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).
Speedometer accuracy and acceleration test results for an Essex Terraplane.
| Identifier | ExFiles\Box 113\2\ scan0185 | |
| Date | 30th September 1933 | |
| X1725. To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} 30.9.33. 8451 ESSEX TERRAPLANE. The speedometer has been checked over the mile, and the table shows the various speeds. M.{Mr Moon / Mr Moore} P. H.{Arthur M. Hanbury - Head Complaints} Speedo. Reading. 30. 40. 50. 60. Timed speed. 28.75 38.25 48.25 57.25 Amount reading fast.%. 4.35 4.55 3.63 3.0 Acceleration test in top gear with 2 passengers and full tank of petrol. 10 - 30 MPH. 7 secs. 10 - 40 MPH. 11 secs. 10 - 50 MPH. 15.2 secs. 10 - 60 MPH. 22.4 secs. F.{Mr Friese} Dodd. F.{Mr Friese} Dodd | ||