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).
Refuting claims about unacceptable noise levels in a limousine trials car by comparing it to other models.
| Identifier | ExFiles\Box 48\4\ Scan187 | |
| Date | 9th December 1922 | |
| To Da {Bernard Day - Chassis Design} /Ev. {Ivan Evernden - coachwork} from Hs. {Lord Ernest Hives - Chair} c. to Da. {Bernard Day - Chassis Design} c. to Sp. {Mr Spinney} X4238 Hs {Lord Ernest Hives - Chair} 2/LG9.12.22. LIMOUSINE TRIALS CAR. X4238 X3730 With reference to your memo. Da {Bernard Day - Chassis Design} /Ev {Ivan Evernden - coachwork} 2/M5.12.22. We do not agree with the statements you make. We agree, of course, to sit in a car with it stationary and if one does not run the engine, there will be no noise from the body. We say, that bodies should be made with the understanding that the engine is going to be run, - there will be an exhaust noise, there will be an axle noise and other noises which are impossible to avoid. We claim that a similar exhaust system has proved satisfactory on a number of open trials cars - Hooper Landaulet car, Maythorn totally enclosed limousine car - (this car was used for the Amateur Drivers' test and was run by the same people who are criticising the green limousine. There was not a single complaint of exhaust noise or booming on that body and at the present time we can demonstrate clearly that that car, although one would expect it to be the worst type, is infinitely better than the green limousine). We also have a Hooper limousine car which is very much better than the Barker. We do not agree with the method you adopted to prove that it is the exhaust. We have had the green limousine at the Works. It has been tried by everybody at the Works. We went to the trouble of making different exhaust fittings which definitely altered the note in the exhaust. When the car was driven along the road under normal conditions, there was not the least bit of differ-ence in the noise inside the body. contd:- | ||