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 performance and modifications of the flywheel, clutch, gearbox, and servo motor.
| Identifier | WestWitteringFiles\V\2January1931-April1931\ Scan010 | |
| Date | 30th January 1931 guessed | |
| -10- was good. There has been a slight sticking on the left lock throughout the mileage. We have not had any inclination for the steering to wobble at either low or maximum speeds. FLYWHEEL & CLUTCH to LOP G.54364 - LeC 2830/1 G.L.435. New modified flywheel and clutch, incorporating separate gear ring, revised lightened type, stronger springs, damper plate, automatic lubrication spigot bearing. The clutch was very smooth in operation after the attention at 6,000 miles. It began to slip slightly towards the finish of the test, but this was to be expected as our previous report pointed out. The modifications have been made which prevents any oil being flung on to the fabrics and the clutch will not have this fault when produced. The seizing up of the trunnion sleeve is also being dealt with. The modifications made in respect of the automatic lubrication is quite O.K. and are being incorporated in the design. The setting back of the flywheel bringing the centre of gravity back approx. 1.00" we have not been able to appreciate as the period coincides with the bouncing of the valve springs. Modifications have also been made to prevent the springiness of the back plate. GEAR-BOX & ACTUATING GEAR to LOP G.54070 - U.53463 N.B.2977. 2937. 3104. 3129. The gear-box has been free from any serious oil leaks throughout the mileage. It was not necessary to add any oil. We were of the opinion that the gears were not up to our standard for quietness. The side shaft was very good. The rear support of the gear-box showed no weakness. The functioning of this support combined with the engine mounting gave very satisfactory results. Modifications are being made so that it will not be necessary to remove the crossmember to dismantle the gear-box. The gear-box dismantled was found to be generally in a good condition. The third gear showed slight signs of plucking out but is quite O.K. for the mileage. The Hoffman 150 Ball Race on the first motion shaft was turned down as being noisy, there were no other parts that were not up to standard. As reported on the clutch the reducing of the feed hole to .125" was ample for the automatic lubrication of the clutch spigot. SERVO MOTOR MECHANISM to LOP G.54015 N.B. 3077. (1) Incorporating damper for brake gear G.L.402 (2) Friction linings G.54241 (bottom A) fixed to pressure plates by staples The servo has been efficient throughout the mileage | ||