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 to AC-Sphinx Sparking Plug Co. Ltd. regarding revs-per-mile calibration for instruments and a missing speedometer adaptor.
| Identifier | ExFiles\Box 165\2\ img155 | |
| Date | 3rd February 1938 | |
| 6011. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}6/JH. 3rd. February, 1938. The AC-Sphinx Sparking Plug Co.Ltd., Dunstable, Beds. For the attention of Mr. Benion Brown. Dear Sirs, We have now ascertained that the revs-per-mile calibration figure required for the four pairs of instruments which you are making for us is 808. Thus your first figure 798 will be near enough. You delivered to us some time ago two drives one for a speedometer and one for a rev-counter. We find that the speedometer has no adaptor attached. It is only on the car in which special gears to suit your 1022 instrument were fitted that your drive will fit. Will you please send the necessary adaptor and also fit same to any further drives which you make up for the experimental section. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||