The M2-F1 Lifting Body is seen here testing its ''instant L/D rocket'' on the lakebed at NASA's Flight Research Center (later redesignated the Dryden Flight Research Center), Edwards, California. The M2-F1 was an experimental aircraft. Its outer plywood shell was built by sailplane maker Gus Briegleb, while the internal frame was built at the Flight Research Center. The instant lift-over-drag (L/D) rocket was developed at the Navy facility at China Lake, California