Effect of Northrop and Zap trailing-edge flaps on airplane performance, by deflecting flaps 15-20° on take-off run of Northrop monoplane is reduced by about 30%; weight of Zap installation with operating mechanism is approximately 0.3 to 0.36 lb per sq ft of wing area.
Split trailing-edge flap
Aeroplane
Aeroplane ; 44 , n 9
1933
Article (Journal)
English
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