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).
Notes on armature spring settings, pinion clearance, and motor travel modifications.
| Identifier | ExFiles\Box 64\4\ scan0197 | |
| Date | 6th March 1929 guessed | |
| contd :- -2- (9) Main armature spring D.71569 with .125" packing to give a spring plus packing set up length of 3.700" and force of 5.05 lbs. (10) Pinion clearance from wheel disengaged position to be .175" i.e., equal to the damper travel and set of spring reduced to low value by shortening spring. (11) Also contact to be made over last .200" of travel. Item (10) appears to be necessary to eliminate the possibility of bouncing back into gear contact on disengagement. It will call for, in the next motors to be tested, an increase of total armature travel of .075 to .775 making the new travel of the armature relative to the damper equal to the width .600" of the pinion. This note will be followed up by a specification of items which we consider should be incorporated in the next motor for bench test. EPC. | ||