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Effect of the NACA Injection Impeller on the Mixture Distribution of a Double-row Radial Aircraft EngineFor the normal range of engine power the impeller provided marked improvement over the standard spray-bar injection system. Mixture distribution at cruising was excellent, maximum cylinder temperatures were reduced about 30 degrees F, and general temperature distribution was improved. The uniform mixture distribution restored the normal response of cylinder temperature to mixture enrichment and it reduced the possibility of carburetor icing, while no serious loss in supercharger pressure rise resulted from injection of fuel near the impeller outlet. The injection impeller also furnished a convenient means of adding water to the charge mixture for internal cooling.
Document ID
19930081758
Document Type
Other - NACA Technical Note
Authors
Marble, Frank E. (National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Ritter, William K. (National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Miller, Mahlon A. (National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Date Acquired
August 16, 2013
Publication Date
May 1, 1946
Subject Category
Aerodynamics
Report/Patent Number
NACA-TN-1069
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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