Flying Tube

Stipa-Caproni tubular fuselage monoplane

1932

It basically was a flying venturi tube with a 120 h.p. de Havilland Gipsy III engine fitted inside it, while the propeller turned in the front edge of the tube. The crew sat in a bulge on top of the fuselage.

Australian 3/5-scale replica built by Bruce Wolf for Aerotec Pty. Ltd.,
powered by a 75 h.p. Simmonini Vee Twin engine.

Source