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).
Query regarding noise from the 20 HP model's radiator shutters at 1000 revs.
| Identifier | ExFiles\Box 39\4\ Scan094 | |
| Date | 30th November 1929 | |
| COPY. X3499 Sevres. P/W.Hdn. c. EP.{G. Eric Platford - Chief Quality Engineer} c. HS.{Lord Ernest Hives - Chair} Ps.5/RJ.30.11.29. X.5250 X.3499 RE. 20 HP. SHUTTERS. You have probably heard the noise our radiator shutters make when they are fully open and the engine running at 1000 revs. The noise increases with the engine revs., and is caused by the suction of air over the shutter blades producing vibrations when they are set at a certain angle (fully open). Is there any way of overcoming this?. Ps. | ||