From this report,

V-tail Cobra.
 

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From Air Force 1957,

I can't ID these two projects ?.
The first one resembles the D-181:
1704802803275.png

The second one could be an early variation of the D-188 program, which used deflected stream (contrary to the D-188B which used tilt-rotors instead). I have an undefined Bell VTOL project with the same fuselage configuration but deflection in wingtip pods (the one in your image probably used deflection under the fuselage).

1704802999010.png
 
The second one could be an early variation of the D-188 program, which used deflected stream (contrary to the D-188B which used tilt-rotors instead). I have an undefined Bell VTOL project with the same fuselage configuration but deflection in wingtip pods (the one in your image probably used deflection under the fuselage).

Thanks,and may that's right,or it was earlier project ?.
 
If I recall correctly the original requirement that led to the CH-47 was an ability to move the Honest John missile around the battlefield.
 
The FAA database contains interesting reference to Bell models as follows:
  • APT70 — electric (N314AR, c/n 007, and one deregistered); that's their new unmanned cargo drone
  • Cavalon — 4 Cycle gyroplane (N4594B, c/n V00327); originally a German product from Autogyro GmbH; located at Texas A&M Engineering Experiment Station
Also:
  • AAPPT — 2 Cycle (deregistered); unidentified
  • PITS-Junior — electric (deregistered); unidentified
  • PITS-Senior — electric (deregistered); unidentified
  • PITS-Slave 2 — electric (deregistered); unidentified
  • SFV — Turbo-jet (deregistered); unidentified
  • SFV2 — Turbo-jet (deregistered); unidentified
Does any of those ring a bell with you? It sure doesn't with me!
 

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