Tests on a Bentley head regarding detonation, plug failures, and oil pressure after fitting a new gear pump.
| Identifier | ExFiles\Box 144\3\ scan0147 | |
| Date | 19th January 1937 | |
| -2- Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} 11/AP.19.1.37. (d) Repeat (a) (b) and (c) on 5.B.IV. which has a standard Bentley head. of In the above tests the heads the carbon should not be cleaned off as the detonation trouble is a complaint after the car has had extensive running. The idea of the test is to try to avoid using Ethyl on account of plug failures. 1.B.IV. A large capacity Helical gear pump Lec.4288 has been fitted to the above car in order to note any failure of oil pressure after braking. Rm {William Robotham - Chief Engineer} /GWH. {George W. Hancock - Head Chateauroux} has complained of this on 6.B.IV. Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} | ||
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).