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 condition of various experimental electrical units after a 10,000-mile test.
| Identifier | ExFiles\Box 179\2\ img150 | |
| Date | 1st January 1932 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/wst. c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. E.{Mr Elliott - Chief Engineer} De. c. FW. FN. c. SP.{Mr Spinney} MX.{John H Maddocks - Chief Proving Officer} ORIGINAL Hs{Lord Ernest Hives - Chair}/wst.2/AEM.1.1.32. X6083 19-GIV ELECTRICAL EQUIPMENT. The condition of the various experimental units after a 10,000 mile test was as follows :- (a) Dynamo with British Carbon brushes. The dynamo was quite O.K. and the brushes showed no signs of distress, but standardisation of these brushes has been held over until we can ascertain the performance of a cheaper grade for comparison. (b) Ignition distributor. This, with the exception of the contact points, was found to be in good condition. The lever pivot was found to have remained well lubricated. The bad condition of the tungsten contact points has been attributed, as reported elsewhere, to the excessive cooling of the ballast resistance. (c) Ignition coil. This was examined and tested O.K. GMH. reports that this coil does not misfire under load when very hot as was the case previously on 19-GIV with a standard coil. (d) Instrument Board. The Boyce clock failed due to the contact pivot wearing. This clock had previously been on test continuously for 18 months, but we have sent the clock to the makers for a report. The Watford speedometer failed due to the main worm drive spindle shearing. Messrs. Norths have now strengthened this piece. (e) Lucas Alto horn and windscreen wiper. The Lucas H.F. horn placed on the front cross member has been pronounced the best ever for moving traffic at high speeds, but the tone disc bolted to the diaphragm has cracked and we have taken up the matter with Messrs. Lucas. The windscreen wiper which was the first one to be fitted to any car, proved to be very quiet but failed to wipe the screen at high speeds. We have also discussed this wiper with the makers with a view to getting various improvements effected. Hs{Lord Ernest Hives - Chair}/wst. | ||