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dc.creatorUnited States. Army. Air Service. Engineering Division.en_US
dc.date.accessioned2017-11-09T19:22:37Z
dc.date.available2017-11-09T19:22:37Z
dc.date.created1920-08-30en_US
dc.identifier.urihttp://hdl.handle.net/11200/49068
dc.descriptionThe most serious difficulty in theoretical analyses of airplane performance arises from a lack of reliable data on the variation of the horsepower of the propulsive system with altitude. An empirical-theoretical solution of this problem has been given in McCook Field Serial No. 1221 and should serve as a close approximation. In this report an engine-propeller factor is derived which expresses the ration of the horsepower available from the propulsive system at any altitude to the horsepower obtained from the engine at the ground with a propeller of 100 per cent efficiency. The factor curve gives a picture of the drop off in propulsive efficiency with altitude. In this document, curves for the Liberty "12" and the Hispano-Suiza "300" engines are given.en_US
dc.formatPDFen_US
dc.publisherWashington, D.C. : Chief of Air Serviceen_US
dc.relation.ispartofseriesAir Service information circular (Aviation) ; v. 1, no. 92en_US
dc.relation.ispartofseriesMcCook Field report ; Serial no. 1324en_US
dc.subjectAeronautics--Researchen_US
dc.subjectAeronautics--Systems engineeringen_US
dc.subjectHorsepoweren_US
dc.subjectAirplanes--Performanceen_US
dc.subjectAirplanes--Motors--Testingen_US
dc.subjectAirplanes--Design and constructionen_US
dc.titleVariation of horsepower with altitude (airplane section, s & a branch)en_US
dc.typeTexten_US


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