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).
On testing and improvements for the Bentley centre radiator mounting to resolve bonnet knocks.
| Identifier | ExFiles\Box 87\1\ scan0039 | |
| Date | 27th June 1933 | |
| To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} c. to By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Les.13/KT.27.6.33. BENTLEY CENTRE RADIATOR MOUNTING LeC.3470. We found that the above scheme, with fairly soft control rubbers either side of the centre point, caused the radiator movement to be actually worse than if it had had no centre mounting. This resulted in bonnet knocks. With no radiator control rubbers the radiator was stationary and the bonnet knocks cured. We have now tested springs EB.818 to replace the rubbers. These are satisfactory on the road. In order to amplify frame jellying we had no load on the front shock dampers and the front tyre pressure reduced to 15 lbs/ sq.in. We shall use these springs for the next 10,000 mile car. For production we suggest that the spring EB.818 should be ordered in small quantities, until we have gained more experience from the next car which is going to France. Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} | ||