1938 NIAI RK-I extending wing fighter plane.
https://s3-us-west-1.amazonaws.com/h...hter_plane.jpg
More: https://en.wikipedia.org/wiki/NIAI_RK-I
Previously:
https://www.homemadetools.net/forum/...536#post136010
https://www.homemadetools.net/forum/...295#post116282
https://www.homemadetools.net/forum/...925#post137521
https://www.homemadetools.net/forum/...735#post136850
https://www.homemadetools.net/forum/...657#post136540
https://www.homemadetools.net/forum/...2642#post76720
