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).
Pros and cons of fitting a larger battery and starter motor, and agreeing to a new armature construction method.
| Identifier | ExFiles\Box 38\5\ Scan223 | |
| Date | 16th May 1922 | |
| To EFE. from DA.{Bernard Day - Chassis Design} ORIGINAL X 3398 DA{Bernard Day - Chassis Design}1/M16.5.22. cp to HS.{Lord Ernest Hives - Chair} ✓ X 4130. X 3398 RECEIVED MAY 17 1922 X 4132. 40/50 - LARGER BATTERY & STARTER MOTOR WOUND 2 COILS IN SERIES & 2 IN PARALLEL. With reference to the Standardisation Sheets which you have sent me in the above connection, I regret that I find I am unable to sign them, because there does not seem to be sufficient evidence that a larger battery is required, and since the proposed modification of the field winding calls for a larger battery, it does'nt seem possible to agree to that either. It is quite certain of course that a larger battery would give better service and that a motor which effectively used more electrical HP. would spin the engine faster and that this would be an advantage in starting; but the increase in weight of 20 lbs. in the battery and an increase in cost (because though you say the battery is to be supplied for the same price, it is evident that they would reduce the cost of the present battery if asked to do so) does not seem to be justified at present by existing difficulties in starting. With reference to the new method of building up the armature and the solid pole pieces, I agree to this and have signed the standardisation sheet. DA.{Bernard Day - Chassis Design} | ||