1949 Seibel S-4 helicopter.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...r_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...helicopter.jpg
Previously:
https://www.homemadetools.net/forum/...138#post168777
https://www.homemadetools.net/forum/...444#post166276
https://www.homemadetools.net/forum/...207#post161279
https://www.homemadetools.net/forum/...901#post160165
https://www.homemadetools.net/forum/...176#post138386
https://www.homemadetools.net/forum/...690#post159457
https://www.homemadetools.net/forum/...617#post159170
