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).
The 10,000-mile test of various electrical components on a car.
| Identifier | ExFiles\Box 35\1\ scan 066 | |
| Date | 21th April 1920 | |
| X.2656 To R.{Sir Henry Royce} from EFC. c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to En. c. to Da.{Bernard Day - Chassis Design} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Ey. X.3647 - 10,000 MILE TEST OF ELECTRICAL PARTS ON 2 EX. X.3743 We attach copy of Mr. Hives' report to me on the various items of electrical equipment on this car. Our comments on these areas follows :- (1) Battery. See our other report EFC7/T20.4.20. (X 604) (2) C.M.3 Brushes on Starter Motor. We are at once issuing standardisation sheets for the C.M.3 brushes although we understand we have sufficient C.M.1 brushes in stock to complete the first 1,000 chassis. No trouble is at the moment being experienced with the C.M.1 brushes with stronger springs N.1760. (X.2656) (X.368-2) (3) Battery Ignition. The Tungsten or Platinum would burn away owing to the imperfect condenser connection and the consequent misfiring might not have been noticed owing to the magneto being in use at the same time. See our report EFC1/T16.4.20 recommending positive connection between condenser housing and chassis frame. (X.3229-) (X.2894) (X.1186) (X.2572) (4) Ignition Coil. This has been a coil with 16,000 turns. Although this appears to have given no trouble on the 10,000 mile test, we do not recommend this for standardisation at the moment owing to the loss of spark length due to reduced secondary turns, as indicated on Contd. (X.3775) (X.3443) | ||