US Navy Type Specification TS-145 (Observation Airplane)

[Stargazer]

The Spangenberg Index lists a series of aircraft proposals for an HO class (observation) competition that apparently spawned no offspring (all documents are dated November 1956):

Aero Design & Engineering TP-2000
Beechcraft PD-109
Bell D-196
Fairchild M-249
Goodyear GA-34
North American NA-250
Northrop N-180
Piasecki PA-67
Ryan 73
Thieblot TA-17
Vertol 90
Wilford VOW - Mk V (VOW-5)

Until now the NA-250 was an unfortunate gap in the NAA charge number listing... no more.

 

[Stargazer]

Forgot the Wilford VOW - Mk V (VOW-5) which apparently was also submitted to the same spec.

 

[Stargazer]

The Ryan Model 73 was also apparently submitted to the TS-145 specification.

 

[hesham]

And from the book; Aerospace Technologies of Bell Aircraft Company : a Pictorial History