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).
Requesting a valve modification to resolve an issue with brake thumps.
| Identifier | ExFiles\Box 32\2\ Scan085 | |
| Date | 13th October 1933 | |
| Xr559. 204 To RHC{R. H. Coverley - Production Engineer}: from Hs{Lord Ernest Hives - Chair}/Gry{Shadwell Grylls}: Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}1/KT.13.10.33. BRAKE THUMPS: Will you please make a valve to the accompanying Hs.{Lord Ernest Hives - Chair}1166. We find that with a .015 hole in the piston as at present, thereis insufficient damping for thumps, but too much on the return thus preventing the brake coming off. We think that with a .010 hole and this valve we may overcome the trouble. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||