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 an asbestos manufacturer discussing the use of sprayed asbestos to reduce sound vibration ('booming') in car body panels.
| Identifier | ExFiles\Box 138\1\ scan0072 | |
| Date | 13th March 1933 | |
| CONTRACTORS TO THE LORDS OF THE ADMIRALTY, INDIA OFFICE, WAR OFFICE, COLONIAL GOVERNMENTS AND RAILWAY COMPANIES THROUGHOUT THE WORLD. TELEGRAMS: "SPECIAL, LEEDS". CODES: BENTLEYS. A.B.C. 5TH EDITION. WESTERN UNION. DIRECTORS: W.N. ROBERTS, H.{Arthur M. Hanbury - Head Complaints} JONES, S.H.H. BARRATT, A.P. STROHMENGER, TURNER & NEWALL, LTD. LIMPET BRAND TRADE MARK (REGISTERED) TELEPHONE Nos ARMLEY 38005-6. (PRIVATE BRANCH EXCHANGE) J.W. Roberts, Limited. Asbestos Manufacturers. Armley, Leeds, England. NLD/MMB 13th March 1933. Messrs. Rolls-Royce Limited, D E R B Y. For the attention of Mr. Robotham. Dear Sirs, SPRAYED LIMPET ASBESTOS. ----------------- With refrence to your experimental car body which it is your intention to have sprayed with Asbestos in order to investigate the possibility of this process being useful as a means of reducing 'booming' in panels, we shall be glad if you could give us three or four days notice before sending your car, as all our plant at the moment, has been withdrawn from the Works and is being used elsewhere. We should like to take this opportunity of mentioning the very interesting point raised by you during demonstration given last week at Messrs. Barkers in London, when it was noticed that the immediate effect of applying Asbestos was to deaden the sound and to considerably reduce the pitch of the note, to such an extent that it might lead to the possibility of the vibration period being altered sufficiently to bring it below the threshold of audibility, somewhere in the region of 30 cycles per second which unfortunately does appear to affect the nervous system. This point was of course, raised more as [Handwritten note in left margin]: LID.{A. J. Lidsey} Proc Note | ||