Report on Test of Propeller Shaft Revolution Indicator System, Instantaneous Type, Manufactured and Submitted by the Electric Tachometer Corporation, Philadelphia, Pa.
Abstract
The submitted system, shown by Plate 1, was interconnected electrically and tested for conformance with specifications, references (b) and (c). Due to development of trouble in No. 1 master instrument, the endurance test was extended from 500 hours to 864 hours. The shaft transmitters were driven ahead at a speed corresponding to shaft speeds of 400 r.p.m. One hour in every 24 hours, the direction of rotation of both shafts was reversed. Particular attention was given the master indicator transmitters and repeater indicators to note whether the error was within the accuracy requirements. Over the entire period of the test, the synchronous motors of the master transmitter indicators were supplied with current from the frequency control unit (Drawing 2109F). The usual inspection of the equipment for conformance with the specifications, relative to design and materials, was made.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 12, 1936
- Accession Number
- AD1150345
Entities
People
- J. R. Coomes
- J. S. Bryant
- W. B. Roberts
Organizations
- United States Naval Research Laboratory