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).
Letter from S. Smith & Sons regarding the modification of speedometers for blackout conditions.
| Identifier | ExFiles\Box 165\2\ img270 | |
| Date | 18th September 1940 | |
| 105 2nd Drawer TIN CABINET Electrical CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR MINISTRY TELEPHONE: GLADSTONE 3333 (40 LINES) TELEGRAMS: SPEEDOFAC, PHONE, LONDON. CABLES: SPEEDOFAC, LONDON. CODES: MARCONI, COMMERCIAL, BENTLEY'S. BY APPOINTMENT TO THE LATE KING GEORGE V S. Smith & Sons (Motor Accessories) Ltd CRICKLEWOOD WORKS LONDON, N.W.2 BRANCHES AT PARIS MILAN SYDNEY WELLINGTON AGENCIES AND SERVICE STATIONS THROUGHOUT THE BRITISH EMPIRE AND IN ALL THE PRINCIPAL COUNTRIES. SHOWROOMS & DEPOTS 179-185 GT PORTLAND ST LONDON, W.1. 26-33, COX ST LIVERY ST BIRMINGHAM. 14a, JACKSONS ROW DEANSGATE MANCHESTER. 21, DRURY STREET GLASGOW. DUBLIN & BELFAST. Please quote our reference: S.I. SALES DIRECTOR'S OFFICE RM{William Robotham - Chief Engineer}/PC please specify length of each flex required for these speedometers. W.A. Robotham, Esq., Rolls-Royce Ltd., D E R B Y. Dear Robotham, Many thanks for yours of the 15th September, Ref. RM{William Robotham - Chief Engineer}3/Dn. Speedometers. Whilst I appreciate your observations, without wishing to make any excuses there are extenuating circumstances in the case of the instrument No. Z.183 under notice. Thank you for kindly promising to send along some new Speedometers from your Stores - these will be most helpful for our purpose. I will arrange to have them adjusted to suit the gear ratios of your various experimental cars if you will be good enough to furnish me with the necessary data for this purpose. There is one modification I would like to have made to these instruments in view of the present black-out conditions, i.e. to luminize each pointer and the 20 and 30 markings. I have adopted this procedure in the case of the instrument on my own car and find it effective and the only solution to the black-out difficulties. May I offer to treat your own and any of your colleagues' instruments similarly? | ||