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).
Objections from A.T. Speedometer Co. to an electrical specification for speedometers.
| Identifier | ExFiles\Box 165\2\ img091 | |
| Date | 9th June 1937 | |
| Rm{William Robotham - Chief Engineer}/Wst. C.B./9/6/37 6065 BY.5/G.9.6.37. LOSL RE: ELECTRICAL SPECIFICATION - SPEEDOMETERS. Referring to Rm{William Robotham - Chief Engineer}/Wst.18/AP.19.5.37. we have submitted this specification to the A.T. Speedometer Co. and they have taken serious objection to Items 3 and 6. Item 3. A.T. Speedometer Co. would/prefer a 6" radius instead of the 4.5. We never use a 4.5 radius, and I would suggest that 6" is more reasonable in this connection, as we should not impose a very much increased rate of curvature than that which would be used in practice. The load, the time and the temperature to be tried out by them before they can give final agreement. This they are doing at the moment. Item 6. A.T. Speedometer Co. consider that an allowance of 2 secs. to move from zero to full scale is unnecessarily short. They point out that a car cannot possibly accelerate at anything like this rate, and they suggest that 5 secs. is allowed for acceleration from zero to full scale reading. I see no particular reason for the particular value of the 2 secs. as against the 5, and would suggest that we met them in this particular point. BY.{R.W. Bailey - Chief Engineer} [Handwritten note in left margin]: What is the figure for the P.III? We do not want to make our accn. seem less than theirs. | ||