Request to add red radial lines to a Bentley speedometer dial to indicate maximum speeds in each gear.
| Identifier | ExFiles\Box 165\2\ img086 | |
| Date | 4th June 1937 | |
| To HPS {Horace Percy Smith - Experimental Factory Mgr} /CEP. c.c. to Wst/CAP. 6051 Rm {William Robotham - Chief Engineer} /Wst.11/JH.4.6.37. Will you please forward to the A.T. speedometer Co. Bentley speedometer No.R.419, with the request that they draw on the dial a radial line in red, at each of the speeds indicated below and label them respectively 1st, 2nd, 3rd, and top. Top 3rd. 2nd. 1st. 95.5 75.6 54.5 34.5 These road speeds in the corresponding gear, occur at the maximum engine revs of 4,500 r.p.m. and will therefore serve to show the driver (without a rev-counter) when he has reached maximum engine speed. Rm {William Robotham - Chief Engineer} /Wst. | ||
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).