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).
Graph showing the variation in reading of an A.T. speedometer with temperature rise.
| Identifier | ExFiles\Box 50\4\ Scan112 | |
| Date | 9th May 1927 guessed | |
| VARIATION IN READING OF A.T. SPEEDOMETER WITH TEMP. RISE Y-Axis: M.P.H. SLOW PERCENTAGE ERROR FAST 8, 14% 7, 12% 6, 10% 5, 8% 4, 6% 3, 4% 2, 2% 1, 0 X-Axis: ATMOSPHERIC TEMPERATURE C° 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34 | ||