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).
Requirements and arrangement for a gearbox test rig.
| Identifier | ExFiles\Box 143\1\ scan0130 | |
| Date | 9th January 1936 | |
| x1299 To EJJ. Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}6/KN.{D. G. McKechnie - Sales}9.1.36. Gearbox Test Rig. We attach hereto a print of Rm.{William Robotham - Chief Engineer}39, showing the arrangement of the gearbox test rig which we suggest. The difference between this and our previous scheme is that the motors are smaller to reduce cost. In order to be able to do endurance testing on this rig it will be necessary to have a 4/1 reduction gear between the motor and the gearbox under test, and a 4/1 increasing gear at the generator end. These 4/1 gears must also be capable of working as a straight through drive for the purpose of silence testing. Our difficulty is that we do not know whether suitable reduction gears are available. The reduction gear at the motor end should be capable of dealing with 50 H.P. at 3,000 r.p.m. on the high speed shaft, while that at the generator end must deal with 50 H.P. at 1,000 r.p.m. on the high speed shaft. The control gear should be arranged so that the generator can be used as a motor and the motor as a generator. The capacity of the motor and generator should be :- Continuously rated @ 50 H.P. @ 3,000 r.p.m. Capable of giving 50 H.P. at 4,000 r.p.m. for short periods. Speed range 1000 - 4000 r.p.m. at full torque. " " 500 - 4000 r.p.m. at light loads. Will you please let us know whether it will be possible to obtain the necessary reduction gears. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||