QH-50 Dash anti-submarine helicopter.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...helicopter.jpg
More: https://en.wikipedia.org/wiki/Gyrodyne_QH-50_DASH
Previously:
https://www.homemadetools.net/forum/...209#post141732
https://www.homemadetools.net/forum/...2209#post75951
https://www.homemadetools.net/forum/...4385#post79850
https://www.homemadetools.net/forum/...934#post137540
https://www.homemadetools.net/forum/...364#post135219
https://www.homemadetools.net/forum/...209#post130545
