Note: This engine is located in the Presidential Gallery on a controlled-access portion of Wright-Patterson Air Force Base. Click here for requirements to visit this gallery.
The T-31 engine was the first American turboprop engine to power an aircraft. It made its initial flight in the Consolidated Vultee XP-81 on Dec. 21, 1945. The T-31 was mounted in the nose; a J-33 turbojet engine mounted in the rear fuselage provided added thrust. The T-31 was also used on the Navy XF2R-1, similarly powered by a turboprop/turbojet engine combination. The engine was to have been flown experimentally on a Curtiss XC-113 (a converted C-46), but the experiment was abandoned after the XC-113 was involved in a ground accident. Only 28 T-31s were built; none were used in production aircraft, but improved production turboprop engines were developed from the technology pioneered by the T-31.
TECHNICAL NOTES: Model: T-31-GE-3 Weight: 1,980 lbs. Maximum hp: 2,300 (design) Maximum engine rpm: 13,000 Maximum propeller rpm: 1,145