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).
Tests and issues with the gearbox, servo motor, propeller shaft, and rear axle.
| Identifier | ExFiles\Box 5a\2\ 02-page346 | |
| Date | 18th December 1930 guessed | |
| -7- GEAR BOX & ACTUATING GEAR to LOP G.54070 - G.53463 N.S.2977. - 2937 & 3104 - 3129. The Gear Box is free from any serious oil leaks. It has not been necessary at this mileage to replenish the level of the oil. The first, second, and third gears are not up to standard quality for quietness. The side shaft is good and quite up to standard. The rear support of the gear box in conjunction with the engine suspension we consider an improvement. Experimental Tests are being carried out with this arrangement. At the present moment the design is such that to remove the gear box, the cross member supporting the gear box has to be removed. This is a costly procedure and would entail serious recurrent expense for the Firm when put into production. SERVO MOTOR MECHANISM to LOP G.54015 - N.S. 3077. (1) Incorporating Damper for Brake Gear - G.L.402. (2) Friction Linings G.54241 (Cotton "A") fixed to Pressure Plate by staples. There was at the start of the test a period of Servo Gear rattle on the retard at a speed of 40-38 mph. This has now almost disappeared and would not be a complaint. The Servo has been efficient and given no trouble. We dismantled it to observe the condition of the fabrics and lubrication. The lubrication was ample. The driving pins were free and were not rusty. The condition of the rear fabric was poor. It had deteriorated by the weaving of the fabric working loose at a point where it is held by a staple. It would appear to be where the weaving of the fabric is cut short, by cutting out the circle from a straight woven fabric. A circular woven fabric if it could be procured would circumvent this failure? The front fabric was quite O.K. with no sign of pulling away from the staples. The damper has prevented any servo clanks being heard when released. PROP: SHAFT to LOP G.53436. MECHANICS JOINTS E.S.2589. The increased size of the propellor shaft has eliminated the vibrations at high speed and is an improvement. The mechanics joints have given no trouble. The front and rear did not require any oil at 5000 miles. The universal feel perfectly free with no undue slack, no wear having developed. A slight amount of oil has been flung out of the front sliding joint. REAR AXLE to LOP G.53920 Bx 41 RATIO New parts as listed on the above LOP for withdrawal of Pinion and Housing. (1) N.S.2917. 850 offset Hypoid Gears. (2) N.S.3142. G.L.429 Centralised Lubrication. The axle quietness is not considered to be as good as our standard production of the 25HP. When the axle is cold or only warm, no exception | ||