In the earlier days of aircraft design, there was a lot of copying or seeing how somebody else solved a problem.
I have heard that the USSR had an exact, reversed, copy of the DC 3. The back door was on the other side. Made from photos of the blueprints was the story I heard.
Eventually, I hope to have the older history of the RNZAF on here,
Thanks for your interest.
In Russia there is an AN-2 airplane they are very similar to Wicko GM1
In the earlier days of aircraft design, there was a lot of copying or seeing how somebody else solved a problem.
I have heard that the USSR had an exact, reversed, copy of the DC 3. The back door was on the other side. Made from photos of the blueprints was the story I heard.