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 decision to use chilled cast phosphor bronze for the bushes in the Phantom III and Bentley overdrive gearboxes.
| Identifier | ExFiles\Box 94\2\ scan0304 | |
| Date | 1st January 1937 | |
| HY{Tom Haldenby - Plant Engineer}/CRL.{C. R. Lisson} RMC. c. BY/HST c. Rm.{William Robotham - Chief Engineer} c. Da.{Bernard Day - Chassis Design} c. BY/HD.{Mr Hayward/Mr Huddy} 328 BY.3/G.S.1.37. GEARBOX - PHANTOM III. Will you kindly note I have decided to go back to bronze on the Phantom III box for the bushes inside the synchromesh helical gears. We are making arrangements to supply more oil, as this is undoubtedly the cause of the wear of the bushes originally. There is a danger of seizing up with the hardened steel bushes, and when this occurs it is a complete breakdown, so far as the customer is concerned. This cannot occur with the bronze bush. The Bentley overdrive box will be treated in a similar way. The material is chilled cast phosphor bronze. BY.{R.W. Bailey - Chief Engineer} | ||