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).
Use of stronger versus weaker selector rod springs in the Phantom III gearbox.
| Identifier | ExFiles\Box 94\2\ scan0005 | |
| Date | 5th June 1936 | |
| X328 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} c. Da.{Bernard Day - Chassis Design} E/HDY.{William Hardy}2/HP.5.6.36. Phantom III Gearbox. Selector Rod Springs. The stronger selector rod springs referred to by me yesterday are numbered G.56309. These were fitted until 25.11.35, when I asked that they should be replaced by the present weaker springs G.82221 as at that time we had not heard of any cases of gears coming out of mesh. The stronger spring gives 10.5 lbs load on the ball against 7.5 for the weaker spring. The present 20/25 and Bentley boxes are fitted with 10.5 lbs springs although before the 20/25 box had synchromesh mechanism it had the 7.5 lb spring. I suggest that we replace the stronger springs on boxes giving trouble in order to find out whether they make any difference. E/HDY.{William Hardy} | ||