52! « o i-3 CO O V With constant With variable ; With constant pitch propeller 0 pitch propeller pitch propeller " variable " " H- O P H … .0 ; 1.4 1.8 2.2 Speed/stalling speed Total useful work 63.2% & 73.2f0 g.4 HF. speed curves & power balance sheet, single engined tra,ctor biplane (land M/C) with vee air-cooled geared engine,Effect of variable pitch propeller. 0Q
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