ARC-1985-AC85-0209-5

YO-3A parked on ramp

Jun 27, 1997

NASA's ultra-quiet YO-3A acoustics research aircraft taxis out from the ramp at the Dryden Flight Research Center before a pilot checkout flight

Oct 29, 2004

NASA's converted YO-3A observation plane, now used for acoustics research, touches down at Edwards Air Force Base following a pilot checkout flight

Oct 29, 2004

The slow-speed wooden propeller and long wings are evident as NASA's YO-3A acoustics research aircraft performs a low-level flyover at Edwards Air Force Base

Oct 29, 2004