Burnelli UB-20 prototype airliner from the 1930s. Only one was built.
https://s3-us-west-1.amazonaws.com/h...0_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...1_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...016#post160570
https://www.homemadetools.net/forum/...065#post160731
https://www.homemadetools.net/forum/...117#post145358
https://www.homemadetools.net/forum/...235#post157933
https://www.homemadetools.net/forum/...458#post192932
