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 about how to overcome noise from 20-HP radiator shutters when fully open at high engine revs.
| Identifier | ExFiles\Box 105\1\ scan0047 | |
| Date | 28th February 1929 | |
| Sèvres F/W "Hm{Capt. W. Hallam - Head Repairs}" [crossed out] copy "Hs{Lord Ernest Hives - Chair}" X5250. Re: 20-HP Shutters Ps5/RJ.30/II/29. X5250 X3499 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. [STAMP: RECEIVED NOV 2] HS{Lord Ernest Hives - Chair} | ||