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).
Letter from Silentbloc Limited regarding the rubber hardness of anti-vibration mountings supplied for testing.
| Identifier | ExFiles\Box 117\1\ scan0316 | |
| Date | 28th February 1939 | |
| DIRECTORS: T. B. ANDRE, H.{Arthur M. Hanbury - Head Complaints} VEZEY STRONG, V.{VIENNA} A.{Mr Adams} TRIER, W. L. HARRIS SILENTBLOC LIMITED TELEPHONE PARK 9821 (4 LINES) TELEGRAMS SILENTBLOC, NOTTARCH, LONDON VICTORIA GARDENS LADBROKE ROAD NOTTING HILL GATE LONDON, W. 11. Messrs. Rolls Royce Ltd., DERBY. 28th Feb/1939. SWJ/JL. ROY.{Sir Henry Royce}LES.7/ER. Dear Sirs, We were interested to hear the results of your tests on the Silentbloc anti-vibration Mountings with rubbers of Shore Hardness 70-75 which we recently supplied. There will be no difficulty in supplying further units made with rubber of hardness 65-70 but, since our standard hardness is 51-55 and not 60 as mentioned in your letter, it might be desirable from the point of view of noise reduction to use a slightly softer quality, say 60-65. For any given quantity there is no difference in price between mountings made with the various qualities of rubber mentioned above. Yours faithfully, SILENTBLOC LIMITED, S. W. JELLEY. CHIEF ENGINEER. | ||