Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
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Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
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Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
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Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned. The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
TTBW-90-lt-blue-windows-with-gray-back
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
TTBW-90-lt-blue-windows-with-gray-3-4-bottom-left
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
TTBW-90-lt-blue-windows-with-gray-Head-On
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
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Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
TTBW-90-lt-blue-windows-with-gray-aerial
Notice anything different about the wings on this airliner? This conceptual truss-braced wing narrowbody is an aircraft with a 170ft span folding wing. By utilizing trusses, the aircraft can have longer, thinner wings with greater aspect ratios. This, in turn, translates into less drag and 5-10% less fuel burned.  The Transonic Truss-Braced Wing aircraft originated from a joint effort by NASA and Boeing to develop subsonic commercial transport concepts – meeting NASA-defined metrics in terms of reduced noise, emissions, and fuel consumption. The design is currently undergoing wind tunnel testing and other studies by NASA researchers.
An artist’s concept of the transonic truss-braced wing aircraft configuration in flight over a forest of trees.
An artist’s concept of the transonic truss-braced wing aircraft configuration in flight over a forest of trees.
Instrumentation of the wing and strut that comprise the Mock Truss-Braced Wing 10-foot model are complete at NASA’s Armstrong Flight Research Center in Edwards, California.
NASA Prepares for Mock Truss-Braced Wing Tests
Engineering technician Jeff Howell removes thin pieces of tape from fiber used for a bonding process on the Mock Truss-Braced Wing 10-foot model at NASA’s Armstrong Flight Research Center in Edwards, California.
NASA Prepares for Mock Truss-Braced Wing Tests
An epoxy is applied to adhere the fiber optic sensor installation on the Mock Truss-Braced Wing 10-foot model at NASA’s Armstrong Flight Research Center in Edwards, California.
NASA Prepares for Mock Truss-Braced Wing Tests
Engineering technician Jeff Howell removes tape from the Mock Truss-Braced Wing 10-foot model at NASA’s Armstrong Flight Research Center in Edwards, California. The tape was used to limit the amount of epoxy on the model wing during the process to secure the fiber optic strain sensors to the wing.
NASA Prepares for Mock Truss-Braced Wing Tests
Engineering technician Jeff Howell mounts conventional strain gauges to the Mock Truss-Braced Wing 10-foot model at NASA’s Armstrong Flight Research Center in Edwards, California. The conventional system data will be compared the Fiber Optic Sensing System developed at the center on the same wing to see how well the testing methods match.
NASA Prepares for Mock Truss-Braced Wing Tests
Truss-Braced Wind Model installed in the Ames 11x11 Foot Wind Tunnel for testing. The Truss-Braced model is part of the Subsonic Ultra Green Aircraft Research Project (SUGAR)
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A red light confirms that the fiber of the Fiber Optic Sensing System installed on the Mock Truss-Braced Wing 10-foot model works as intended at NASA’s Armstrong Flight Research Center in Edwards, California. The fiber, which is about the thickness of a human hair, is part of a system that can provide strain information researchers can use to determine the model’s durability.
NASA Prepares for Mock Truss-Braced Wing Tests
Truss-braced wind model installed in the Ames 11x11 Foot Wind Tunnel for testing as part of the Subsonic Ultra Green Aircraft Research Project (SUGAR)
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Truss-braced wind model installed in the Ames 11x11 Foot Wind Tunnel for testing as part of the Subsonic Ultra Green Aircraft Research Project (SUGAR) Shown here with test engineer Greg Gatlin, Langley Research Center.
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Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. The infrastructure, in blue, holds the wing and truss and enables the test. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. The test team makes observations between tests. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
Matthew Sanchez attaches the strut and the wing to ensure they fit together as intended for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. A view from above shows the test structure, the wing, and the strut. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Competes Efficient Wing Model Tests
Matthew Sanchez consults with Andrew Holguin on the strut for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
German Escobar works on milling the strut frame assembly for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Matthew Sanchez assembles wing ribs for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
A milling machine drills holes in the strut frame assembly for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Matthew Sanchez prepares a sheet of aluminum that will be cut into the outer layer of the strut for the 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. Frank Pena, test director, checks the mock wing. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
Matthew Sanchez assembles wing ribs to the 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Matthew Sanchez attaches the strut and the wing to ensure they fit together as intended for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Jose Vasquez verifies a jury strut adaptor created for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Aaron Rumsey and Beto Hinojos carefully add weight to a 6-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Model Wing
A jury strut adaptor is created for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Matthew Sanchez, left, consults with Sal Navarro on assembling wing ribs to the 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
NASA will demonstrate high-risk, high-payoff technology advancements critical for U.S. aerospace manufacturers to bring to market innovative, cost-effective, and sustainable products and services demanded by airlines and customers.
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Frank Pena and Benjamin Park watch as data streams in from tests on a 6-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California.
NASA Armstrong Tests Model Wing
A machine cuts, rotates, and turns a block of aluminum to make a forward wing strut fastener for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. From left, ground vibration test director Ben Park, Natalie Spivey, and Samson Truong, prepare for a vibration test. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Competes Efficient Wing Model Tests
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. Charlie Eloff, left, and Lucas Oramas add weight to the test wing to apply stress used to determine its limits. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
Matthew Sanchez places the strut and the wing side-by-side before assembling them for a check to ensure they fit together as intended for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. Weights are hung from the wing to apply stress used to determine its limits. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
Jose Vasquez programed a machine to cut, rotate and turn a block of steel to form a jury strut adaptor for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. Weights are added to the wingtip to apply stress used to determine its limits. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
A block of aluminum is transformed by a machine programmed to cut, rotate, and turn it to make a forward wing strut fastener for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Matthew Sanchez uses a water jet to cut aluminum for the outer layer of the strut for the 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. From left, test director Frank Pena and Ray Sadler watch as Lucas Oramas, left, and Charlie Eloff add weight to the test wing to apply stress used to determine its limits. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. Ben Park, NASA mock wing ground vibration test director, taps the wing structure with an instrumented hammer in key locations and sensors monitor the results. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Competes Efficient Wing Model Tests
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. Jonathan Lopez, from left, and Jeff Howell watch test data as it is collected. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Tests Efficient Wing Model
Jose Vasquez uses a machine to cut, rotate and turn a block of aluminum to make a forward wing strut fastener for a 10-foot model of the Transonic Truss-Braced Wing at NASA’s Armstrong Flight Research Center, in Edwards, California. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Builds Model Wing
Researchers test a 10-foot Mock Truss-Braced Wing at NASA’s Armstrong Flight Research Center in Edwards, California. Samson Truong, from left, and Ben Park, NASA mock wing ground vibration test director, prepare for a vibration test. The aircraft concept involves a wing braced on an aircraft using diagonal struts that also add lift and could result in significantly improved aerodynamics.
NASA Armstrong Competes Efficient Wing Model Tests
A model of an aircraft with a Transsonic Truss-Braced Wing is seen during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
NASA Administrator Bill Nelson holds a model of an aircraft with a Transonic Truss-Braced Wing during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
NASA Administrator Bill Nelson holds a model of an aircraft with a Transonic Truss-Braced Wing during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Boeing’s MD-90 aircraft flies from Victorville California to Palmdale, California on August 15, 2023. This aircraft will be NASA’s future Sustainable Flight Demonstrator. Modifications to the aircraft will include changes to the fuselage and most notably the use of a transonic truss-braced wing.
Boeing MD-90 flies from Victorville, California to Palmdale, California where it will begin modifications as part of NASA Sustainable Flight Demonstrator
Boeing’s MD-90 aircraft flies from Victorville California to Palmdale, California on August 15, 2023. This aircraft will be NASA’s future Sustainable Flight Demonstrator. Modifications to the aircraft will include changes to the fuselage and most notably the use of a transonic truss-braced wing.
Boeing MD-90 flies from Victorville, California to Palmdale, California where it will begin modifications as part of NASA Sustainable Flight Demonstrator
Boeing’s MD-90 aircraft flies from Victorville California to Palmdale, California on August 15, 2023. This aircraft will be NASA’s future Sustainable Flight Demonstrator. Modifications to the aircraft will include changes to the fuselage and most notably the use of a transonic truss-braced wing.
Boeing MD-90 flies from Victorville, California to Palmdale, California where it will begin modifications as part of NASA Sustainable Flight Demonstrator
Boeing’s MD-90 aircraft flies from Victorville California to Palmdale, California on August 15, 2023. This aircraft will be NASA’s future Sustainable Flight Demonstrator. Modifications to the aircraft will include changes to the fuselage and most notably the use of a transonic truss-braced wing.
Boeing MD-90 flies from Victorville, California to Palmdale, California where it will begin modifications as part of NASA Sustainable Flight Demonstrator
Boeing’s MD-90 aircraft flies from Victorville California to Palmdale, California on August 15, 2023. This aircraft will be NASA’s future Sustainable Flight Demonstrator. Modifications to the aircraft will include changes to the fuselage and most notably the use of a transonic truss-braced wing.
Boeing MD-90 flies from Victorville, California to Palmdale, California where it will begin modifications as part of NASA Sustainable Flight Demonstrator
Boeing’s MD-90 aircraft flies from Victorville California to Palmdale, California on August 15, 2023. This aircraft will be NASA’s future Sustainable Flight Demonstrator. Modifications to the aircraft will include changes to the fuselage and most notably the use of a transonic truss-braced wing.
Boeing MD-90 flies from Victorville, California to Palmdale, California where it will begin modifications as part of NASA Sustainable Flight Demonstrator
Ice accretion is shown on the leading edge of the next-generation Transonic Truss-Braced Wing design at NASA Glenn's Icing Research Center. This critical research will help understand icing effects for future, high-lift, ultra-efficient aircraft. Photo Credit: (NASA/Jordan Salkin)
TTBW Wing-Truss Junction Model at the Icing Research Tunnel
Thomas Ozoroski, an Icing Researcher, is shown documenting ice accretion on the leading edge of the next-generation Transonic Truss-Braced Wing design at NASA Glenn's Icing Research Center. This critical research will help understand icing effects for future, high-lift, ultra-efficient aircraft. Photo Credit: (NASA/Jordan Salkin)
TTBW Wing-Truss Junction Model at the Icing Research Tunnel
Boeing’s MD-90 aircraft flies from Victorville California to Palmdale, California on August 15, 2023. This aircraft will be NASA’s future Sustainable Flight Demonstrator. Modifications to the aircraft will include changes to the fuselage and most notably the use of a transonic truss-braced wing.
Boeing MD-90 flies from Victorville, California to Palmdale, California where it will begin modifications as part of NASA Sustainable Flight Demonstrator
NASA Deputy Administrator Pam Melroy delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, answers a question from a member of the media during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Sydney Hamilton, structures manager for transonic truss braced wing at The Boeing Company, left, and Tony Castilleja Jr., senior manager for space at The Boeing Company, are seen during an Artemis Generation Roundtable for Black Space Week, Tuesday, June 20, 2023, at the Eisenhower Executive Office Building in Washington. As part of Black Space Week, the National Space Council and NASA collaborated with Black In Astro to host students for a discussion on the future of space exploration and equity. Photo Credit: (NASA/Joel Kowsky)
Artemis Generation Roundtable
NASA Administrator Bill Nelson delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Zaid Sabri and Thomas Ozoroski, Icing Researchers, are shown documenting ice accretion on the leading edge of the next-generation Transonic Truss-Braced Wing design at NASA Glenn's Icing Research Center. This critical research will help understand icing effects for future, high-lift, ultra-efficient aircraft. Photo Credit: (NASA/Jordan Salkin)
TTBW Wing-Truss Junction Model at the Icing Research Tunnel
NASA Administrator Bill Nelson delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
NASA Deputy Administrator Pam Melroy delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Todd Citron, chief technology officer, The Boeing Company, answers a question from a member of the media during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
NASA Administrator Bill Nelson, left, Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, center, and Todd Citron, chief technology officer, The Boeing Company, right, are seen following a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Brent Cobleigh, program manager for the Sustainable Flight Demonstrator at NASA's Armstrong Flight Research Center, center, answers a question from a member of the media during a news conference along with NASA Deputy Administrator Pam Melroy, left, and Todd Citron, chief technology officer, The Boeing Company, right, on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Jackie McGuinness, NASA’s Press Secretary, left, NASA Administrator Bill Nelson, Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, NASA Deputy Administrator Pam Melroy, Brent Cobleigh, program manager for the Sustainable Flight Demonstrator at NASA's Armstrong Flight Research Center, and Todd Citron, chief technology officer, The Boeing Company, are seen as they take questions from members of the media during a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Todd Citron, chief technology officer, The Boeing Company, left, delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project as NASA Administrator Bill Nelson, second from left, Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, NASA Deputy Administrator Pam Melroy, and Brent Cobleigh, program manager for the Sustainable Flight Demonstrator at NASA's Armstrong Flight Research Center, look on, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
NASA Deputy Administrator Pam Melroy, center, is seen with Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, NASA Administrator Bill Nelson, Todd Citron, chief technology officer, The Boeing Company, and Brent Cobleigh, program manager for the Sustainable Flight Demonstrator at NASA's Armstrong Flight Research Center, following a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
Todd Citron, chief technology officer, The Boeing Company, left, delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project as NASA Administrator Bill Nelson, second from left, Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, NASA Deputy Administrator Pam Melroy, and Brent Cobleigh, program manager for the Sustainable Flight Demonstrator at NASA's Armstrong Flight Research Center, look on, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC.  Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)
Sustainable Flight Demonstrator Project Announcement
KENNEDY SPACE CENTER, FLA. --  Rollback of the rotating service structure, or RSS, begins on Launch Pad 39A, revealing Space Shuttle Atlantis, bathed in lights. Rollback is one of the milestones in preparation for the launch of mission STS-117 on June 8 and started at 10:56 p.m. EDT. The RSS provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure.  Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation.  Photo credit: NASA/Kim Shiflett
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KENNEDY SPACE CENTER, FLA. --  After rollback of the rotating service structure, or RSS, on Launch Pad 39A, Space Shuttle Atlantis stands bathed in lights. Rollback is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. and was complete at 11:34 p.m EDT. The RSS provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure.  Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation.  Photo credit: NASA/Kim Shiflett
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KENNEDY SPACE CENTER, FLA. -- Following sunrise on a cloudy Florida day, Space Shuttle Atlantis awaits launch atop a mobile launch platform at Launch Pad 39A. Rollback of the pad's rotating service structure, or RSS, is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. EDT June 7 and was complete at 11:34 p.m. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure. Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. Photo credit: NASA/Ken Thornsley
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KENNEDY SPACE CENTER, FLA. -- The sun rises on a cloudy Florida day to reveal Space Shuttle Atlantis awaiting launch atop a mobile launch platform at Launch Pad 39A. Rollback of the pad's rotating service structure, or RSS, is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. EDT June 7 and was complete at 11:34 p.m. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure. Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. Photo credit: NASA/Ken Thornsley
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KENNEDY SPACE CENTER, FLA. -- Cameras are prepared to record the launch of Space Shuttle Atlantis from Launch Pad 39A following sunrise on a cloudy Florida day. Rollback of the pad's rotating service structure, or RSS, is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. EDT June 7 and was complete at 11:34 p.m. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure. Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. Photo credit: NASA/Ken Thornsley
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KENNEDY SPACE CENTER, FLA. -- The lightning mast on Launch Pad 39A stands ready to protect Space Shuttle Atlantis from potential thunderstorms following sunrise on a cloudy Florida day. Rollback of the pad's rotating service structure, or RSS, is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. EDT June 7 and was complete at 11:34 p.m. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure. Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. Photo credit: NASA/Ken Thornsley
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KENNEDY SPACE CENTER, FLA. --  At Launch Pad 39A, Space Shuttle Atlantis stands bathed in lights atop a mobile launch platform as technicians in the control booth roll the rotating service structure, or RSS, away from the orbiter. Rollback is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. and was complete at 11:34 p.m EDT. The RSS provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure.  Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation.  Photo credit: NASA/Kim Shiflett
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KENNEDY SPACE CENTER, FLA. -- Cameras are prepared to record the launch of Space Shuttle Atlantis from Launch Pad 39A by Theaphlias B. Terrell, operations manager of Bionetics Photoservice, following sunrise on a cloudy Florida day. Rollback of the pad's rotating service structure, or RSS, is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. EDT June 7 and was complete at 11:34 p.m. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure. Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. Photo credit: NASA/Ken Thornsley
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KENNEDY SPACE CENTER, FLA. -- On a cloudy Florida day, Space Shuttle Atlantis awaits launch atop a mobile launch platform at Launch Pad 39A. At the right of the pad is the 290-foot tall, 300,000-gallon water tank that is part of the sound suppression system during launches. In the foreground, photographers position themselves on the crawlerway, in hopes of capturing a unique prelaunch image. Rollback of the pad's rotating service structure, or RSS, is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. EDT June 7 and was complete at 11:34 p.m. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure. Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. Photo credit: NASA/Ken Thornsley
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KENNEDY SPACE CENTER, FLA. --  Following rollback of the rotating service structure, or RSS, on Launch Pad 39A, Space Shuttle Atlantis stands bathed in lights atop a mobile launch platform. Rollback is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. and was complete at 11:34 p.m EDT. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure.  Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation.  Photo credit: NASA/Kim Shiflett
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KENNEDY SPACE CENTER, FLA. -- The sun rises on a cloudy Florida day to reveal Space Shuttle Atlantis awaiting launch atop a mobile launch platform at Launch Pad 39A. At the right of the pad is the 300,000-gallon water tank that is part of the sound suppression system during launches. Rollback of the pad's rotating service structure, or RSS, is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. EDT June 7 and was complete at 11:34 p.m. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure. Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. Photo credit: NASA/Ken Thornsley
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KENNEDY SPACE CENTER, FLA. -- On a cloudy Florida day, Space Shuttle Atlantis awaits launch atop a mobile launch platform at Launch Pad 39A. At the right of the pad is the 290-foot tall, 300,000-gallon water tank that is part of the sound suppression system during launches. In the foreground is the crawlerway. a 130-foot-wide roadway with a 5-percent grade leading to the top of the launch pad. Rollback of the pad's rotating service structure, or RSS, is one of the milestones in preparation for the launch of mission STS-117 on June 8. Rollback started at 10:56 p.m. EDT June 7 and was complete at 11:34 p.m. The RSS, the massive structure to the left of the shuttle, provides protected access to the orbiter for changeout and servicing of payloads at the pad. The structure is supported by a rotating bridge that pivots about a vertical axis on the side of the pad's flame trench. The hinge column rests on the pad surface and is braced to the fixed service structure. Support for the outer end of the bridge is provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crosses the flame trench on a permanent bridge. The RSS is 102 feet long, 50 feet wide and 130 feet high. The structure has orbiter access platforms at five levels to provide access to the payload bay while the orbiter is being serviced in the RSS. Each platform has independent extendable planks that can be arranged to conform to a payload's configuration. This mission is the 118th shuttle flight and the 21st U.S. flight to the International Space Station and will deliver and install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. Photo credit: NASA/Ken Thornsley
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