Strip theory method of calculation for airscrews on high-speed aeroplanes

Show simple item record Lock, C. N. H. Pankhurst, R. C. 2015-11-04T12:26:10Z 2015-11-04T12:26:10Z 1945-10
dc.description.abstract The report describes a simplified 8-point strip theory method of calculating the free-air performance of a propeller up to tip Mach numbers near the velocity of sound. It is based on the assumptions of R. & M. 1674 and 1849 together with the further simplifying assumption that the curve is straight (valid below the stall) and that the curve also is straight (valid for J > 1.0). The report includes tables of parameters which are required in the calculations as functions of J, r, and N for eight standard radii (r, = 0.3, 0.45, 0.6, 0.7, 0.8, 0.9, 0.95, 0.975) for the range of values of J from 1.0 t o 7.0; these are of universal application. In addition, tables of section data for various section shapes are required; these are given for Clark Y sections over a range of thickness in R. & M. 2036; they were derived, by methods described in R. & M. 2020, from overall measurements of thrust and torque on full scale propellers at low values of J in the Royal Aircraft Establishment 24-ft. tunnel and are subject to revision in the light of subsequent experimental research. en_US
dc.language.iso en en_US
dc.publisher H. M. Stationery Office en_US
dc.relation.ispartofseries ARC/RM;2035
dc.title Strip theory method of calculation for airscrews on high-speed aeroplanes en_US
dc.type Technical Report en_US

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