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).
Technical report on the performance and wear of the flywheel, clutch, pedals, engine mounting, gearbox, and hydraulic damper.
| Identifier | ExFiles\Box 82\2\ scan0134 | |
| Date | 1st August 1934 guessed | |
| - 3 - FLY WHEEL AND CLUTCH LOP. GB.1173. NS.{Norman Scott}3948. GL.{G. Linnett}710. Lightened fly wheel and increased friction surfaces to NS.{Norman Scott}3948. External adjustment. Fly wheel modified to NS.{Norman Scott}1416. EX.14659 Friction plate staggered .015 set. EX.14191 VM. material friction linings. EX.14194 Pressure ring. EX.13830 Friction plate. Tubular rivets used to secure linings to plates. No wear of the material can be measured. .005" float on back plate. The clutch has remained free from jaggers and trans-mission rattle throughout the mileage. There has been no slipping during the latter part of the mileage. Wear of the linings has been small. Clutch pedal set to 7.375" from dashboard at beginning is now 7.5625". Under full torque with the flexible mounting of the engine, the pedal comes very close to the floor boards. Clutch trunion has been noisy throughout the mileage. The clutch case made in magnesium does not show any defects. PEDALS WITH MOULDED RUBBER PADS. The rubber is still firmly attached to the pedals; no undue wear has taken place and no comments have been made with regard to control with the foot. The mounting of the pedals has given no trouble. FLEXIBLE REAR ENGINE MOUNTING TO LEC.3909 3937. There has been no further distortion of the rear cross-member during the latter part of the mileage. We have not been able to measure any appreciable drop of the engine in the rear mounting. Taking the torque re-action dampers off has not made any difference to the mounting or smoothness of the engine. GEAR BOX. MAGNESIUM CASTING. LOP. GB.518. NS.{Norman Scott}4095 MODIFICATION TO PREVENT RATTLES. The gears have remained a good standard for quietness. Ease of change has been consistent. No gears have come out of mesh. It has not been necessary to add any oil to the gear box. The magnes-ium casing does not show any distortion or ill effect. There has been no over-run period of rattles. HYDRAULIC DAMPER UNIT ON THE GEAR BOX. The varying loads adjusted by the hand control has been maintained. There has been no failure of pressure from the unit during the latter part of the mileage; loss of oil was negligeable. | ||