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).
Page from a test procedure manual detailing motor tests, specifically the Teazer Torque Test and the Load Test.
| Identifier | ExFiles\Box 60\2\ Scan049 | |
| Date | 20th March 1931 guessed | |
| -5- at random, allowing the armature to return fully to its normal position each time. Provided the pinion does not jam on the engaging corners, it must slide into mesh far enough for the armature operated contacts to close every time. (8) TEAZER TORQUE TEST. With S2 off, a light brake shall be placed upon the brake drum and a potential of 10.0 ± .1 volts shall be applied to the motor teazer terminal. The motor pinion will then engage the wheel and according to the magnitude of the brake will turn or not turn that wheel. The brake shall now be adjusted until the motor will turn the wheel as slowly as possible but continuously without stopping. Allow the motor to do this for 5 minutes, and during the last minute observe the brake torque, which torque should exceed 20 lbs-ins, if the motor has satisfactorily passed tests (4) and (6) and has a good magnetic circuit in the in gear position. At the same time the teazer current (indicated by A) ought to lie between the limits 13.0 and 15.0 amperes. (9) LOAD TEST. It is assumed in this test that the motor has previously satisfactorily passed the light test. | ||