A

David

Darling

Reentry Flight Demonstrator (RFD)

RFD (Reentry Flight Demonstrator) was two spacecraft, launched on suborbital flights in 1963–64 to test reentry effects on nuclear reactor mock-ups supplied by the United States Atomic Energy Commission (AEC). The tests were carried out at a time when NASA and AEC were engaged in the NERVA (Nuclear Engine for Rocket Vehicle Applications) program.