Boeing Vertol BV-347 experimental helicopter - photo

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

https://diqn32j8nouaz.cloudfront.net...7_fullsize.jpg


Previously:

https://www.homemadetools.net/forum/...207#post161279
https://www.homemadetools.net/forum/...381#post181482
https://www.homemadetools.net/forum/...138#post168777
https://www.homemadetools.net/forum/...690#post159457
https://www.homemadetools.net/forum/...617#post159170

I thought that looked like a Chinkook CH-47.

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

Quote:

---

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

---