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).
Observations on the performance of a 20/25 HP experimental car with a green body.
| Identifier | ExFiles\Box 5\1\ 01-page176 | |
| Date | 31th August 1933 | |
| LID{A. J. Lidsey} x3770. See over To "Hs{Lord Ernest Hives - Chair}" DERBY Sèvres H.S./ET.31.8.33 Re: 20/25 HP. EXPERIMENTAL CAR GREEN BODY (number unknown) Since my return to Paris and after having again tried our CHW.76 demonstration car, I should like to make the following observations: ENGINE The experimental car is not so powerful, nor is its maximum speed so great, although I believe our demonstration car has a much heavier body. Detonations are much in evidence when using ordinary commercial petrol. Possibly the engine requires decarbonizing and tuning up. There is a bad rattle from the timing gear, which is worse than our demonstration car. The noise from the carburetter is a great improvement on our demonstration car. The petrol consumption is very good. It worked out at between 20 and 21 miles to the gallon. The slow speed running is poor, probably because the engine requires tuning up. The maximum speed I obtained was 75 m.p.h. on the speedometer. On two occasions I had to replace the dynamo charge control fuse. Charging generally seemed to be very erratic. STEERING The steering is distinctly fidgety between 50 and 55 m.p.h. It is not so good as the steering on our demonstration car. GEAR BOX Gear rattle can be observed on third and fourth gear, and after the oil is hot, this becomes distinctly unpleasant. CLUTCH The clutch was very good and I never observed any sign of slipping such as was experienced on our demonstration car. | ||