Aerotecnica AC-12 light helicopter from Spain. Twelve were built for the Spanish Air Force in the 1950s.
https://s3-us-west-1.amazonaws.com/h...r_fullsize.jpg
0:21 video:
https://www.youtube.com/watch?v=JUWcmakUuHQ
Previously:
https://www.homemadetools.net/forum/...052#post214139
https://www.homemadetools.net/forum/...506#post212226
https://www.homemadetools.net/forum/...384#post204560
https://www.homemadetools.net/forum/...138#post168777
https://www.homemadetools.net/forum/...995#post213949
