Laister-Kauffman CG-10 American military transport glider. They were being built for Operation Downfall, the planned invasion of Japan, which was cancelled when Japan surrendered.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...r_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...g10_glider.jpg
More:
https://en.wikipedia.org/wiki/Laister-Kauffman_CG-10
https://en.wikipedia.org/wiki/Operation_Downfall
Previously:
https://www.homemadetools.net/forum/...989#post125173
https://www.homemadetools.net/forum/...490#post135773
https://www.homemadetools.net/forum/...620#post136373