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).
Specifications for gearbox and gear testing rigs and measuring apparatus.
| Identifier | ExFiles\Box 155\3\ scan0019 | |
| Date | 14th August 1935 guessed | |
| -3- The capacity of the electric motor for driving the gearbox rig should be as follows. Capable of giving 150 HP. at 2000 r.p.m. for periods of 45 mins. Capable of giving a torque of 400 lbs.ft. over a speed range of 500-3000 r.p.m. for periods of 5 mins. It should be a swinging frame motor for the purpose of measuring torque. The generator can be a fixed frame machine. (2) The rig for testing the silence of individual pairs of gears has yet to be designed. It should, as far as possible, amplify the noise of the gears and the parallelism of the shafts should be accurately maintained. Provision should be made for driving this rig either by a small electric motor of about 5 HP. or by putting it in place of the gearbox on the gearbox testing rig. (3) The rig for endurance testing gears is required for investigating the strength of various forms of gear teeth and has yet to be designed. It could be driven by a small electric motor. This is less urgent than the questions of silence. (4) The rigs for testing the silence of timing gears will probably already be in existence by the time the test house could be established, and it will merely be a question of transferring them and providing the necessary means of driving them (small electric motor). (6) The miscellaneous measuring apparatus would be required for measuring the parallelism and distortion of shafts etc. A pair of indicating clocks reading to 0.001 will be required very early. At a later date it may be found necessary to have gear tooth measuring apparatus, but it is not possible to anticipate requirements in this direction. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||