See the Caproni Transaero from 1921, with eight engines and nine wings it’s right from the time you are talking about - putting engines on a fixed wing solid pl

See the Caproni Transaero from 1921, with eight engines and nine wings it’s right from the time you are talking about - putting engines on a fixed wing solid plane body is possible but sufficient understanding of flight is still missing. https://youtube.com/watch?v=uYn6fyGNg7c https://youtube.com/watch?v=uYn6fyGNg7c