Ryan YQM-98 R-Tern

It could take off and land from a runway like a manned aircraft, and operate at high altitudes for up to 24 hours to perform surveillance, communications relay, or atmospheric sampling.

"Compass Cope" was a program initiated by the United States Air Force (USAF) in 1971 to develop an upgraded reconnaissance drone that could take off and land from a runway like a manned aircraft, and operate at high altitudes for up to 24 hours to perform surveillance, communications relay, or atmospheric sampling.

Boeing was originally selected as a sole source for the Compass Cope program, with the USAF awarding the company a contract for two YQM-94A (later YGQM-94A) demonstrator vehicles in 1971.

The YQM-98A's general configuration was similar to that of the Boeing Compass Cope B, resembling a jet sailplane with a twin-fin tail, retractable tricycle landing gear, and an engine in a pod on its back.

[1] However, the Boeing Compass Cope B won the competition in August 1976 on the basis of lower cost, with the company awarded a contract to build preproduction prototypes of the YQM-94B operational UAV.

Signed cover envelope for the first flight of the Compass Cope R. Aug. 17, 1974 - Edwards Air Force Base, California
Preserved YQM-98A on display without its engine at the Pima Air & Space Museum .