A kid-friendly version of this page isn’t written yet — you’re seeing the regular version below. Back to the gallery to find an aircraft with a Kids version.
The Martin X-23A PRIME (SV-5D) is a small lifting-body re-entry vehicle tested by the United States Air Force in the mid-1960s. Unlike ASSET, primarily used for structural and heating research, the X-23A PRIME was developed to study the effects of maneuvering during re-entry of Earth's atmosphere, including cross-range maneuvers up to 617 nmi from the ballistic track.