The aviation pocket-book for 1918; a compendium of modern practice and a collection of useful notes, formulae, rules, tables and data relating to aeronautics (1918)
Matthews, Richard Borlase, 1878- · London : C. Lockwood and son · leaf 245
alvelocity of engine, (c) horse-power of engine, and {d) the permis-sible diameter. The blade shape is influenced by three considerations :— 1. The limits of structural convenience. 2. The interfering or disturbing action which one blade exertsupon the air dealt with by another. 3. The relative… … 17 25-5 34 Radius (OC) A Characteristic Efficiency Curve. Div. IV EFFICIENCY AT VARIOUS SPEEDS 105 For a propeller having average blade sections this reaches amaximum when A is in the neighbourhood of 42. An examinationof characteristic curves of the efficiencies of elements plotted againstradii…
Aeronautics
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