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).
The balancing cam used on Bentley & 25 HP timing gears, noting production numbers and reliability.
| Identifier | ExFiles\Box 136\1\ scan0182 | |
| Date | 27th March 1936 | |
| X 1155 To Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}6/JH. 27.3.36. Bentley & 25 HP. Timing Gears. The balancing cam has been fitted to the Bentley since this chassis was first produced. Bentley chassis produced up to introduction of big bore = 1200. No. of cases in which Bentley type balancing cam has worked loose = 1 There is no other serious objection to the Bentley type. The attached sketch shows a comparison of the old Bentley type and the 20/25 type balancing cams. Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||