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).
Extract regarding fitting an electrical speed indicator and a consumption tank to a car for testing.
| Identifier | ExFiles\Box 34\2\ Scan038 | |
| Date | 4th June 1918 | |
| R.R. 255 M (100 T) (S.C. 536. 15-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1547. X. 2238. Extract from EH1/AT.4.6.18. RE 7 C.A. CAR [Handwritten and crossed out text] X.652 X.1807 We are also fitting to this car one of the electrical speed indicators made for the aero engine. We consider it is useful when testing a car to see at a glance the engine revs. There is a change over switch so that it will either read direct or one to two. There is also a consumption tank with a gauge on the car which can be filled from the main tank, so that accurate consumption tests can be taken. | ||