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Improving the Performance of Multi-engined Airplanes by Means of Idling Propellers : the "free-wheel" Propeller (1930)
NASA Technical Reports Server (NTRS) · leaf 19
1I.A.C.A. Technical Memorandum No*561 Figs.l,& 2 1.2 1.0 .8 .6 .2 0 -.2 -.4 ,6o_4o _2o Oo 2° ^° 6° 8° 10° 12° 14° 16° 18° 20° 22°i .24 0, .20 .16 .12 .04 .08 0 ,1 Polar of profile I.(Angle of attack measured from zero lift position.) Fig … •_6c-4° -2° 0° 2° *° 6° 8° 10° 12°14° 16° 18° 20°22° 1 0 .04 .08 .12 .16 .20 .24 C, Fig.2 Polar of profile II. (Angle of attack measured from zero lift postion.NASA Technical Reports Server (NTRS)
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