Instructions for alterations to the Sequence Starter Motor No. 2 scheme.
| Identifier | ExFiles\Box 64\2\ scan0062 | |
| Date | 18th May 1927 | |
| X2625 To BY {R.W. Bailey - Chief Engineer} /RD. from EFC. {E. Fowler Clarke - Electrical Engineer} c. BY. {R.W. Bailey - Chief Engineer} RHC. {R. H. Coverley - Production Engineer} EFC {E. Fowler Clarke - Electrical Engineer} 4/T18.5.27. SEQUENCE STARTER MOTOR NO.2 SCHEME. In regard to RL/M16.5.27 and EFC {E. Fowler Clarke - Electrical Engineer} 3/T18.5.27, would you please instruct the following alterations :- (1) Main control spring of finer gauge to give 66% present force and with as many turns as will just not go choc-a-bloc, so that the force of the spring does not vary so much between its two extreme positions. (2) Move the pole pieces so that the armature in its full-in position is .25 out-of-centre in place of .125". (3) Instruct for the armature to be machined on the outside and (as appears necessary) instruct new pole pieces, both armature and pole pieces to be machined tapered to give the present air gap when the armature reaches its most inward position (.125" off centre), but to give .050" air gap when the armature is in the most outward position. We wish in the first instance to try the effect of these alterations, i.e. before instructing certain others referred to in Mr. Royce's note. In regard to the alteration of the armature, I think it will be found that this can be done on the present armature without touching the windings, though it appears that new pole pieces will be necessary. EFC. {E. Fowler Clarke - Electrical Engineer} | ||
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).