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).
Fitting and performance of a 4-speed gearbox with right-hand change on a 20 HP car.
| Identifier | ExFiles\Box 6\4\ 04-page020 | |
| Date | 11th December 1924 | |
| X5310 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BJ. c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} HY.{Tom Haldenby - Plant Engineer} c. to Wor.{Arthur Wormald - General Works Manager} Hs{Lord Ernest Hives - Chair}5/LG11.12.24. 4-SPEED BOX WITH RIGHT-HAND CHANGE T4247 FOR 20 HP. We have one of these boxes fitted on a 20 HP. car. The box has been built up without the servo drive. The silence of the gears is quite satisfactory. There is a slight noise from the continuous gears. We attach herewith a chart which shews the comparative gear ratios. It will be seen that the 3rd. speed gearing on the 4-speed box is very close to the second speed on the present 3-speed box so that under ordinary average conditions in a district where one uses the top and second speed, there is no noticeable advantage. There is an appreciable advantage when it comes to [handwritten: a hill] which demands the 1st. speed on the present gear. The car fitted with this box has been sent to WW. for R.{Sir Henry Royce} to examine. Hs.{Lord Ernest Hives - Chair} | ||