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).
Experimental trials for car 129-GN, focusing on reducing excessive drumming, booming, and steering-wheel vibration.
| Identifier | ExFiles\Box 18\3\ Scan276 | |
| Date | 2nd October 1931 | |
| x7960. RECEIVED 1931 OCT 3 WT.6/WT2.10.31. 17x634 Pg...from PN.{Mr Northey} Copy to Hs.{Lord Ernest Hives - Chair} 129-GN. Trials. Mr. Leslie from the Experimental Dept. spent most of the day on this car yesterday with a view to trying to reduce the excessive drumming and booming, especially at the back, primarily at between 15 and 32 m.p.h. I had complained also that the torque-reaction vibration felt on the steering-wheel was excessive. On testing this car this morning, subsequent to Mr. Leslie doing all that he could, I was able to agree that the booming at the back had been considerably reduced, to the extent that I feel that we are now justified in using the car, but at the same time the vibration on the steering wheel at the speeds referred to is undoubtedly a bit worse. Fortunately, this unpleasant characteristic is not known to a large majority of people who are given runs on this car, that is, a very few would wish to drive it when on a trial run. I have given the driver special instructions in relation to the driving of this car in order to make the best of what is not a very good job. PN.{Mr Northey} | ||