Boeing L-15 Scout.
https://s3-us-west-1.amazonaws.com/h...l_15_scout.jpg
More:
https://www.airspacemag.com/airspace...out-180973135/
https://en.wikipedia.org/wiki/Boeing_L-15_Scout
Previously:
https://www.homemadetools.net/forum/...213#post126424
https://www.homemadetools.net/forum/...3523#post99315
https://www.homemadetools.net/forum/...637#post102089
