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).
Experimental work on A.T. speedometers, detailing a temperature-related fault that has since been resolved by the manufacturer.
| Identifier | ExFiles\Box 50\4\ Scan130 | |
| Date | 18th July 1927 | |
| To R. {Sir Henry Royce} from Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} c. to BJ. DA. {Bernard Day - Chassis Design} c. to BY. {R.W. Bailey - Chief Engineer} Wor. {Arthur Wormald - General Works Manager} Y4308 Hs {Lord Ernest Hives - Chair} /Rn {Mr Robinson} 1/LG18.7.27. GROUPED INSTRUMENTS. With reference to R1/M14.7.27. We have done some experimental work on A.T. speedometers and find that their reading xx varies considerably with the atmospheric temperature at which they work. We are taken the matter ya up with the makers and they have almost entirely overcome this fault. We now believe they are as reliable as any that can be obtained. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||