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).
Performance of the synchromesh second speed on the Phantom gearbox.
| Identifier | ExFiles\Box 15\5\ Scan417 | |
| Date | 15th April 1935 | |
| W/S - Cx.{Major Len W. Cox - Advertising Manager} 4728 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}2/KW.15.4.35. Replying to Cx.{Major Len W. Cox - Advertising Manager}4/KW.12.4.35. The synchromesh second speed which is now standardised on the Phantom is a good example of the fact that synchromesh on the lower gears is in no way so impressive as it is on top and third. On the lower gears the synchromesh cones have more work to do and the oil drag in the box is much greater. There is no doubt that these difficulties are much less with a small gearbox, but on the Phantom we are continually up against the problem of the size of the car. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||