Lockheed M2A2 Terra-Star experimental auxiliary powered howitzer with tri-star wheel arrangement.
https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...1_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...056#post176193
https://www.homemadetools.net/forum/...066#post184216
https://www.homemadetools.net/forum/...961#post152977
https://www.homemadetools.net/forum/...277#post211429
https://www.homemadetools.net/forum/...254#post101110