Chuck Rogers, Trong Bui, and Scott Bartel make preflight checks on the second of two aerospike research rockets on March 31, 2004.

A closeup of one of the Cesaroni Technology, Inc. - constructed aerospike nozzles used in the Dryden Aerospike Rocket Test.

Launch of the first Dryden Aerospike rocket. The Dryden Aerospike Rocket Test provided the first known data from a solid-fueled aerospike rocket in flight.