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).
Internal order request for diabolo rubbers for the 20 HP model with specific deflection requirements.
| Identifier | ExFiles\Box 104\1\ scan0090 | |
| Date | 30th August 1930 | |
| O.O. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/MJ.30.8.30. Will you please order the following diabolo rubbers for the 20 HP. - Two doz. Rubbers to F.57075 to deflect .1" under a load of 150 lbs. approx. Two doz. Rubbers to F.57075 only over all length to be 1.250 to give .200 deflection under a load of 400 lbs. approx. We want the rubbers as quickly as possible and in consequence are prepared to give Messrs. Dunlops a certain amount of latitude on the hardness of the rubber. Having tested them we may tell them more exactly what we require. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||