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).
The procedures for a light test and an armature return test for a motor.
| Identifier | ExFiles\Box 62\1\ scan0184 | |
| Date | 24th October 1933 guessed | |
| -3- (4) LIGHT TEST. Connect the teaser terminal (T) to a supply at 18 volts through a switch and the main terminal (M) to a supply at 6 volts. The motor shall be run light on the main circuit for a period of 15 mins. with a terminal P.D. across the main terminal and the camse lying between the limits 5.6 to 6.0 volts. At the end of this run the motor current must not exceed 29 amperes thus ensuring that the mechanical friction of the motor is sufficiently small. Every two or three minutes, but not within the last three minutes of the run, operate the teaser switch several times in quick succession in order to oscillate the armature in its bearings. (5) ARMATURE RETURN TEST. This test consists in suitably gripping the pinion nut successively in each 60° position in its rotaion, pulling out the armature to its full distance, letting it back gently to a pulled out distance of only .200, and then letting it go. In each of the six cases, it should restore itself to its full back position and thus confirm the satisfactoriness of the damper fxictional forces involved in the motor bearings and damper piston. | ||