In the 1930's there was a magazine article that proposed an electro gun tank. It was to be propelled by Archimedes screws.
This is my 1/72nd scale paper mock up of the tank.
In WWI there was a mock up of a tank for the US Army to use in WWI. One source says the Army purchased 50 of them. Here is my paper mock up.
When trying to scratch build a model, I often make use of paper mock ups to determine size and shape and figure out the difficult parts.
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