Description and Laboratory Tests of a Roots Type Aircraft Engine Supercharger (1926)
NASA Technical Reports Server (NTRS) · leaf 9
igure. Slip speeds were obtained by blocking off entirely the inlet to the supercharger and, observing the speed required to maintain specified pressure ratios up to 2.2 with no discharge, the pressure on the discharge side being atmospheric. The slip speed will be affected considerably by the… … but the effect may be Drive shaft R. P. M. Fig. 8.—Volumetric efficiency appreciable. In order to obtain an indication of the mechanical limitations of the type, tests were made to determine the speed at which the rotor would burst when rotating by itself in free air. An aluminum alloy rotor failed…
NASA Technical Reports Server (NTRS)
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