Wednesday, April 27, 2022

McDonnell Aircraft Model 18H

McDonnell Model 18H Tandem Engine Fighter General Arrangement Sep-9-44 A copy of the 3-view drawing and other info on the proposed McDonnell Aircraft Model 18H aircraft. This was to be a Army tandem engine fighter with one GE TG-100-I-40 Turbojet and one Pratt Whitney R-2800C engine. Dated 9 September 1944. Credit: Mark Nankivil

Note: The I-40 was a single-shaft turbojet which used a double-inlet, single-stage, centrifugal-flow compressor, fourteen straight-through combustors and a single-stage axial-flow turbine. The engine had a maximum speed of 11,500 r.p.m. and produced 4,000 pounds of thrust (17.79 kilonewtons). The I-40 was 48 inches (1.22 meters) in diameter and weighed 1,820 pounds (826 kilograms). The I-40 would be produced by Allison Division of General Motors as the J33 series.

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