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).
Continued page of test procedures for a distributor rotor, covering tension, insulation, and clearance specifications.
| Identifier | ExFiles\Box 70\4\ scan0123 | |
| Date | 27th January 1925 guessed | |
| -3- Contd. This tension should lie between the limits .9 and 1.2 lbs. There should be no readable difference between just making and just breaking contact, this indicating absence of friction at the pivot. (4) The distributor high tension rotor should be placed on a rig, made to receive it, in such a way that the secondary voltage of a coil undergoing its open circuit test shall be applied between the rotor blade and the inside of its bakelite moulding. This, provided the coil satisfactorily passes the test, confirms that the rotor insulation is sound. (5) After the governor test (20 HP. case, see next page) the H.T. rotor shall be examined for registry with the stationary H.T. points, including comparison of the radial clearances with the limits given on the drawing. The distance measured from the leading corner of the rotor to the centre of the mark where the sparks have passed, must lie between the limits .175" to .050". EFC. | ||