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).
Dynamo rattle, squeaking brakes, and a valve timing boom on a 20 HP Open Demonstration Car.
| Identifier | ExFiles\Box 53\1\ Scan099 | |
| Date | 2nd February 1923 | |
| To PN. {Mr Northey} from Hs. {Lord Ernest Hives - Chair} c. to BJ. c. to EP. {G. Eric Platford - Chief Quality Engineer} X4545 Hs {Lord Ernest Hives - Chair} 3/LG2.2.23. RE. 20 HP. OPEN DEMONSTRATION CAR, 40G5. X 4545 (crossed out) X 4257 We have passed your memo. ref. PN {Mr Northey} 2/DN31.1.23 re. the above, on to EP. {G. Eric Platford - Chief Quality Engineer} as they are matters which should be taken up with him. I am afraid we cannot remember the 20 HP. chassis numbers. 40G5 I believe is the car with the Hooper open body. We take it that the rattle on this car made by the dynamo drive is exceptional, as we have not had complaints on the other cars. With regard to the squeaking brakes. We are investigating this to the best of our ability, but the difficulty is, to get an example upon which to work. We do occasionally hear a brake squeak but as soon as we try and get down to it to diagnose the fault, it is absolutely impossible to get a noise from it. We agree that the symptoms are - when the squeak can be heard is after the car has been standing all night. We know you will realise the difficulty we have in knowing whether we have made an improvement with a fault which is so difficult to reproduce. We are surprised to hear of the boom at 30 m.p.h. because, what we know as a valve timing boom does not, as a rule, come on until a higher speed. Hs. {Lord Ernest Hives - Chair} | ||