Boeing Vertol BV-347 experimental helicopter - photo

[Altair]

Boeing Vertol BV-347 experimental helicopter from the 1970s.




Previously:

Vertol VZ-2 V/STOL research aircraft - photo
Kamov Ka-22 compound helicopter - photo
Hughes XV-9 research helicopter - photo
Bell HSL-1 helicopter - photo
Hughes HX-17 heavy-lift helicopter - photos

[nova_robotics]

I thought that looked like a Chinkook CH-47.

https://en.wikipedia.org/wiki/Boeing_CH-47_Chinook

The Chinook was originally designed by Vertol, which had begun work in 1957 on a new tandem-rotor helicopter, designated as the Vertol Model 107 or V-107