In February 1960, Chance Vought and Pratt and Whitney completed an Air Force study under study requirement SR-175 for a VTOL logistics and support transport that was to be operational in the 1965-70 time frame.
The proposed aircraft was to be powered by four P&W JT12A-7 engines (SR-175 ADAM VTOL Military Transport.jpg). General Dimensions: Length 53ft, Span 43ft, Height 19ft 2in. Max gross weight was targeted at 25,100lbs.
The operating cost was pitched as favorably comparable to the Lockheed Electra, Jet Star and Convair 540.
In addition to the targeted VTOL aircraft of the study a STOL version of the ADAM was included (SR-175 ADAM STOL Military Transport Swing Tail.jpg).
