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 the Air Department regarding the suitability testing of an electrical speed indicator outfit for aero engines.
| Identifier | ExFiles\Box 33\5\ Scan005 | |
| Date | 20th June 1915 | |
| B.D. 2932/1915 Wt.V. 546 6.8-19. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2460. X.1807 AIR DEPARTMENT, ADMIRALTY, LONDON, S.W. 20th June 1915. Gentlemen: X.1807 - ELECTRICAL SPEED INDICATORS X.2125 X.1782. A small magneto generator and Weston Voltmeter have been obtained, and it is desired to test this outfit for general suitability for Aero Engines. The magneto, with wiring and driving belt, have been forwarded direct to Derby, but the Weston Voltmeter has been sent to Mr. Royce at St.{Capt. P. R. Strong} Margaret's Bay as I understand he expressed his wish to see the instrument. Will you please undertake whatever tests may be necessary, and report results to the Air Dept. Yours truly, (Sgd) W. Briggs. Director, Air Dept. [Watermark: MADE AT CROYDON] Messrs. Rolls-Royce Ltd., 15, Conduit Street, Regent St.{Capt. P. R. Strong} W. (Voltmeter recd. from R.{Sir Henry Royce} 23.6.15 & handed to EH). | ||