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Airplane with 2 wings stacked on top of each other.

28 votes

Why do older airplanes have a wing on both the top and the bottom of the aircraft?

In the early days, it really looks as if people hadn't really worked out what worked best Horatio Frederick Phillips, 1904 Multiplane. Longest flight 50 feet (15 metres) Gianni Caproni, Ca.60. 1921 …
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