From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Report cover page regarding the investigation of gearbox noise and vibration spectra, with an attached cover letter.
| Identifier | ExFiles\Box 163\7\ img320 | |
| Date | 19th October 1934 | |
| Top Letter: ...electrostatic voltmeter; alternatively, the wave shape of a fraction of the supply voltage could be recorded by means of a cathode ray oscillograph. We should, if you consider it desirable, be pleased to discuss the matter verbally with you. Yours faithfully, E.{Mr Elliott - Chief Engineer} Davis. for Director. Handwritten Note: The other tests are at present on loan and will be forwarded when available. Library Main Body (mirrored text from underlying report): NOISE FROM GEARS. AERO ENGINE DEPT. REPORT NO. G.C. 54 SUMMARY OF THE INVESTIGATION OF THE SPECTRA OF THE NOISE OF GEARBOXES, AND THE VIBRATION ON THE GEARBOXES. REPORT NO. G.C. 54. 19TH. OCTOBER 1934. SUMMARY OF THE INVESTIGATION OF SPECTRA OF GEARBOX NOISE AND VIBRATION. REFERENCE TO PREVIOUS REPORT. (B) THE MEASUREMENT OF HIGH FREQUENCY VIBRATION. METHOD OF TEST ADOPTED. DATA. A.O.D. REPORT ... REPORT NO. G.C.23. (1) NOTE ON THE MEASUREMENT OF THE PEAK INTENSITY OF THE SOUND EMITTED. THE FOLLOWING DETAILS:- CONTRIBUTION OF THE VARIOUS PARTS OF THE ENGINE. THERE ARE TO MEASURE OVER THE SURFACE VIBRATING ON THE CRANKCASE. A MODIFIED SET OF GEARS CONSTITUTING THE NECESSARY DRIVE & REDUCTION TO ENABLE THESE & ASTERN MOTION. Copied by:- on receipt of some fresh paper DEC. 1945. DERBY F-G-C-P-2029-A Handwritten: B6 | ||