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).
Specification of test and inspection for a 20 HP starter motor with a Bijur Bendix friction drive scheme.
| Identifier | ExFiles\Box 40\5\ Scan127 | |
| Date | 30th May 1923 | |
| X3587. 30.5.23. X.5781 sm. R.R. 20 HP. STARTER MOTOR BIJUR BENDIX X.3587. DRIVE WITH FRICTION DRIVE SCHEME. SPECIFICATION OF TEST & INSPECTION. (a) First the large test gear wheel into which the bendix pinion engages should be locked against rotation. Marks should be made on the elements of the friction drive which will afterwards indicate that relative motion has occurred. The motor should now be switched on and it should be noted that after engagement, the motor armature spindle still turns slowly, proving that the friction drive is working and allows a certain amount of slipping. On no account allow this condition to exist longer than is sufficient to prove the point, as the friction drive will not stand much slipping. (b) Now unlock the large gear wheel and load up with the friction brake to such a load that the motor takes 110 amperes to turn it steadily. It should then be ascertained, after running in this condition for one minute, that there is no sign of the friction drive heating. i.e. it is essential that during this test the friction drive should not have slipped appreciably. (c) Now check the bendix gear mechanism to ensure that it is quite free on the thread. (d) Make an inspection that the distance from the front face of the pinion cage to the body of the motor is still within the limits specified by the drawing. EFC. | ||