NASA NTRS · 19930081467
The N.A.C.A. Optical Engine Indicator
Abstract
An optically recording engine-pressure indicator of simple and rugged construction has been developed for use in high-pressure and high temperature combustion research. This instrument is of the diaphragm type and has a natural frequency of about 10,000 cycles per second.
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Tozier, Robert E. 1938-01-01. The N.A.C.A. Optical Engine Indicator. https://ntrs.nasa.gov/citations/19930081467
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