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).
Customer complaints about a knocking sound in Phantom engines at low speeds.
| Identifier | ExFiles\Box 47\2\ Scan024 | |
| Date | 23th November 1927 | |
| [Handwritten top right] X4117 [Stamp] RECEIVED NOV 25 1927 [Typed top left] S. Wor.{Arthur Wormald - General Works Manager} Er. Ly. He. Ex. Lt. [Typed top right] Hm{Capt. W. Hallam - Head Repairs}8/EW23.11.27. Re Phantom Engines. A Number of Phantom Owners are complaining of a knock in their engine, which can be heard at a speed of about 20 miles an hour with the engine pulling lightly and the throttle partially opened. There has been a great amount of experimental work carried out to try and find the cause of the knock, but up to now we have not been successful. The question which has to be settled at the moment is - what we are to do with the cars about which we have received complaints ? At the present time, we have Miss Cooper's and another car at the Works on which we are trying to over come the trouble, and we have been asked to take in one or two other cars. I would therefore suggest that until we can satisfactorily cure this complaint, we should try to persuade customers to run their cars and that we promise to deal with them immediately we know definitely how to cure the knock. In the meantime, we want all the possible assistance of the Experimental Dept. and the Test Dept. to overcome this trouble. Hm.{Capt. W. Hallam - Head Repairs} [Handwritten Signature] MO | ||