form. (2) The sections at radii 4 feet, 3J feet, 3 feet, and probably2J feet, should be good aerofoil shapes. (3) The maximum ordinate of each section should be situatedat a distance from the nose of the section of about one-thirdthe chord. (4) Sections at the boss of the propeller should be… … THE AERIAL PROPELLER. 105 (6) That the centres of pressure of the various sectionsshould be so placed with respect to the blade axis that theresultant air pressure on the blade passes through the bladeaxis. Fig. 47 gives a good distribution of the centres of pressureon the several sections of a…
Airplanes
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