Aeroplane Propeller String Balance

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An illustration of weighing the propeller of the aeroplane to ensure it is balanced with the opposite side.

Source

H. Barber The Aeroplane Speaks (New York, NY: Robert M. McBride & Co, 1917)

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Full Resolution TIFF

2400×887, 232.7 KiB

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1024×378, 38.2 KiB

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640×236, 20.4 KiB

Small

320×118, 7.5 KiB