VZ-3RY (AF 56-6941, NASA 235, NASA 705) Vertiplane - Level flight 25 knots, flaps deflection 60 degrees. Flight investigation o f the flying qualities of a deflected slipstream VTOL aircraft. Note: Used in publication in Flight Research at Ames; 57 Years of Development and Validation of Aeronautical Technology NASA SP-1998-3300 fig. 115

Research engineer, Harry Henninger of the Ryan Aeronautical Company, with the deflected slipstream model VZ-3RY Vertiplane.

Ryan VZ-3RY over Ames in slow-speed flight. Smooth airflow over entire wing is indicated by tufts when wing had been modified to incorporate leading-edge slats. Tests showed that it could be flown at speeds as low as 6 knots when out of ground effect (which increases lift). April 1963 published in NASA SP-2002-4525 Memoirs of a Flight test Engineer (Seth Anderson)