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Alterations and tests of the "Farnboro" engine indicator / by John H. Collins, Jr.
- Format:
- Book
- Government document
- Author/Creator:
- Collins, John H., author.
- Series:
- Technical note (United States. National Advisory Committee for Aeronautics) ; 348.
- Technical notes / National Advisory Committee for Aeronautics ; No. 348
- Language:
- English
- Subjects (All):
- Internal combustion engines--Indicators.
- Internal combustion engines.
- Recording instruments--Testing.
- Recording instruments.
- Physical Description:
- 1 online resource (14 pages, 5 unnumbered pages) : illustrations
- Place of Publication:
- Washington [D.C.] : National Advisory Committee for Aeronautics, 1930.
- Summary:
- The "Farnboro" electric indicator was tested as received from the manufacturers, and modifications made to the instrument to improve its operation. The original design of disk valve was altered so as to reduce the mass, travel, and seat area. Changes were made to the recording mechanism, which included a new method of locating the top center position on the record. The effect of friction on the motion of the point while taking motoring and power cards was eliminated by providging a means of putting pressure lines on a record.
- The modified indicator gives a complete record of the average cyclic variation in pressure per crank degree for any set of engine operating conditions which can be held constant for the period of time required to build up the composite card. The value of the record for accurate quantitative measurement is still questioned, although the maximum indicated pressure recorded on the monitoring the power card checks the readings of the balanced diaphragm type of maximum cylinder pressure indicator.
- Notes:
- Title from title screen (viewed June 7, 2019).
- "September, 1930."
- "Langley Memorial Aeronautical Laboratory."
- No Federal Depository Library Program (FDLP) item number.
- Includes bibliographical references (page 14).
- Print version record.
- Other Format:
- Print version: Collins, John H. Alterations and tests of the "Farnboro" engine indicator /
- OCLC:
- 1104148308
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