The correct answer is the McDonnell XHJD-1 Whirlaway. Designed to carry up to ten occupants but normally flown as a two-seater with up to 816kg of test instrumentation, the Whirlaway was fitted with twin side-by-side rotors mounted on pylons extending outboard of the engine nacelles. The nacelles, each housing a 450hp Pratt & Whitney R-985-AN-14B seven-cylinder radial engine, were attached to short wings which supported approximately 10 per cent of the gross weight during cruise and as much as 30 per cent of the weight in power-off autorotation, with consequent substantial improvement in overall performance efficiency. Furthermore, this feature, combined with the ability to transmit power from either engine to both rotors by transmissions and gear boxes, enabled the XHJH-1 to maintain level flight at full gross weight on the power of only one engine.
The correct answer was submitted by jeaton1, intruder38, skybolt2003 and Viper Has The Lead. The standings: jeaton1 is first with 8 correct, intruder38 is second with 6 correct, and skybolt2003 is third with 5 correct… Question #9 will post shortly and thanks to all who participate!
Brian [C):-)]