Abstract
IN most cases where a solid moves through a fluid, the total force of the fluid on the solid is nearly opposite to the direction of relative motion. There is an exception in the case of a flat body such as an aeroplane wing, with its plane at a small angle to the direction of relative motion. In that case the force is nearly at right angles to the direction of relative motion, and provides the means of keeping the aeroplane up. If, however, the plane is too steeply inclined to the direction of motion, the force is again, as in ordinary cases, nearly against the motion, and we have the condition of ‘stalling’.
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JEFFREYS, H. ‘Digging’ in Rowing. Nature 125, 928 (1930). https://doi.org/10.1038/125928b0
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DOI: https://doi.org/10.1038/125928b0
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