Future Aircraft Technology Enhancements

The Future Aircraft Technology Enhancements (FATE) program is a program to develop new technologies. It is being run by the Air Force Research Laboratory (AFRL) and the Defense Advanced Research Projects Agency (DARPA). The X-39 aircraft designation is reserved for use with FATE by the USAF.

References

Battle Of The X-Planes
Future Aircraft Technology

USAF / Joint Service experimental aircraft (X-plane) designations since 1941

1–25	X-1 X-2 X-3 X-4 X-5 X-6 X-7 X-8 X-9 X-10 X-11 X-12 X-13 X-14 X-15 X-16 X-17 X-18 X-19 X-20 X-21 X-22 X-23 X-24A / B X-25

26–50	X-26 X-27 X-28 X-29 X-30 X-31 X-32 X-33 X-34 X-35 X-36 X-37 X-38 X-39 X-40 X-41 X-42 X-43 X-44 X-45 X-46 X-47A / B / C X-48 X-49 X-50

50–	X-51 X-52¹ X-53 X-54 X-55 X-56

See also	D-558-1 D-558-2 M2-F1 M2-F2 M2-F3 HL-10 AD-1

¹ Not assigned.