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 discussing test results for an instrument, comparing M.P.H. and R.P.M. figures.
| Identifier | ExFiles\Box 59\2\ Scan168 | |
| Date | 9th July 1932 guessed | |
| -2- These figures agree very well with the figures you obtained at your works. We are at a loss to explain why this instrument has improved, our last test figures being as follows:- 10 M.P.H. 140 R.P.M. 20 " 275 " 30 " 410 " 40 " 540 " 50 " 670 " 60 " 804 " 70 " 949 " 80 " 1070 " Although this instrument is only 1.4% fast at 60 M.P.H., according to your figures, we do not propose to return this instrument again and are now fitting it to the chassis. Yours faithfully, FOR ROLLS ROYCE LIMITED. | ||