CRA (Composite Research Aircraft) Competition of 1960s

[hesham]

For this contest,

the Hughes H-485,Bell T-37 and Lockheed,but no other contenders are known.


American Aviation 1966.

 

[hesham]

Hi,

when I check in my files,I found an old Info about Boeing Vertol,which
involved in this competition,but which design ?.

https://www.secretprojects.co.uk/th...-boeing-helicopters-model-numbers.4671/page-2