US VTOL convertible/composite/vectored thrust transport projects, mid 60s.

Jemiba

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Two other Sikorsky projects, one with a stowable, the other with a
tiltable rotor and another picture of the Boeing tilt-wing
(fom Aviation week 18/67, 1/68 and 19/68)
 

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Stargazer2006

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From Army Research and Development (Feb 1961), illustration an article about the Air Force's SR-175 program (which eventually produced the XC-142 prototypes):
 

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hesham

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Was this a Boeing design ?.
 

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Pioneer

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This Sikorsky VTOL transport design looks as if it had a lot of the Dornier Do31 design influence incorporated into a Lockheed C-130 size aircraft!
Any idea of the time frame of this design proposal??

Regards
Pioneer
 

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