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).
Sticking throttle issues in Bentley cars and a proposed spring-based solution.
| Identifier | ExFiles\Box 85\4\ scan0190 | |
| Date | 13th December 1937 | |
| To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} c. Da.{Bernard Day - Chassis Design} Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}2/MH.{M. Huckerby}13.12.37. BENTLEY THROTTLE SPRINGS. All Bentley throttles are prone to sticking so that the idling speed is different every time the accelerator is released. 6.B.IV was bad (See daily report 2/5 Nov.1937). B.56.BN{W.O. Bentley / Mr Barrington} varies between 400 and 600 r.p.m. A new chassis in the test varied between 350 and 500 r.p.m. B.23.AE stuck at 850 r.p.m. while being demonstrated to Jack Barclay on the Skid-pan. He immediately noticed it and said it was one of their most usual troubles. We have rigged up on Ratcliffe's suggestion a spring which pulls in the opposite direction to the engine suction, thereby reducing the load on the throttle bearings. This appears eminently satisfactory and should be followed up with a design scheme and standardised pending further test. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||