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).
Bentley valve stretching during high speed endurance running and the requested modifications.
| Identifier | ExFiles\Box 88\4\ scan0035 | |
| Date | 5th October 1933 | |
| 6254 RHC.{R. H. Coverley - Production Engineer} From Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation} Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation}2/MA.5.10.33. Re. BENTLEY VALVES. During high speed endurance running for piston development, we have found that after considerable running, the valves are inclined to stretch. We are sending the latest head into the shop, where this trouble has occurred. Will you please have these valves inspected, and modify the head to take double valve springs LEC.3297 EB.507-8, also fit a new set of valves to EB.164-5. Hs{Lord Ernest Hives - Chair}/C.T.Salt. | ||