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Model Tests on the Economy and Effectiveness of Helicopter Propellers (1925)

NASA Technical Reports Server (NTRS) · leaf 30

An illustration from Model Tests on the Economy and Effectiveness of Helicopter Propellers, 1925, leaf 30
c Fig.10 … Angle of tilting Fig.11

NASA Technical Reports Server (NTRS)

Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.

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