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Analysis of cylinder-pressure-indicator diagrams showing effects of mixture strength and spark timing / by Harold C. Gerrish and Fred Voss.
- Format:
- Book
- Government document
- Author/Creator:
- Gerrish, Harold C., author.
- Voss, Fred, author.
- Series:
- Technical note (United States. National Advisory Committee for Aeronautics) ; 772.
- Technical notes / National Advisory Committee for Aeronautics ; No. 772
- Language:
- English
- Subjects (All):
- Internal combustion engines--Cylinders.
- Internal combustion engines.
- Internal combustion engines--Indicators.
- Physical Description:
- 1 online resource (7 pages, 6 unnumbered pages) : illustrations
- Place of Publication:
- Washington [D.C.] : National Advisory Committee for Aeronautics, 1940.
- Summary:
- An investigation was made to determine the effect of mixture strength and of normal as well as optimum spark timing on the performance characteristics of an engine. A single-cylinder test unit utilizing an air-cooled cylinder and a carburetor and operating with gasoline having an octane rating of 92 was used. The investigation covered a range of fuel-air ratios from 0.053 to 0.118. Indicator diagrams and engine performance data were taken for each change in engine conditions.
- Examination of the indicator diagrams shows that for fuel-air ratios less than and greater than 0.082 the rate and amount of effective fuel burned decreased. For a fuel-air ratio of 0.118 the combustion efficiency was only 58 percent. Advancing the spark timing increased the rate of pressure rise. This effect was more pronounced with leaner mixtures.
- Notes:
- Title from title screen (viewed June 7, 2019).
- "August 1940."
- "Langley Memorial Aeronautical Laboratory."
- No Federal Depository Library Program (FDLP) item number.
- Includes bibliographical references (page 7).
- Print version record.
- Other Format:
- Print version: Gerrish, Harold C. Analysis of cylinder-pressure-indicator diagrams showing effects of mixture strength and spark timing /
- OCLC:
- 1104148338
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