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).
Performance testing data from Brooklands, including lap times, speeds, and acceleration with different tyre configurations.
| Identifier | ExFiles\Box 13\4\ 04-page002 | |
| Date | 13th July 1932 | |
| Afternoon. 22-EX. 13.7.32. AT BROOKLANDS. S.U. Carb. Air Temp. 19°C. M.P.H‡ Cut-out closed Lap. 118.4secs 84.13 7 x 21 tyres Cut out open Lap. 110 secs. 90.55 "Repeat" Cut-out open Lap. 119 secs. 91.38 7 x 21 tyres ½ mile cut-out closed 21.3 secs. 84.51 " " " Open 19.3 " 93.26 "Repeat" " " Open 19.3 " 93.26 7 x 20 tyres! Cut-out closed lap. 121.3 secs 81.77 " " ½ mile 21 85.71 " " Open Lap - 111 secs 89.74 " " Open ½ mile - 19.6 Secs. 91.84 7 x 20 tyres Acceleration tests. 10 - 20 4.5 secs. 20 - 30 4.7 " 30 - 40 4.9 " 40 - 50 6.4 " 50 - 60 6.8 " 60 - 70 10.5 " more wind than with expanding carb average taken of two track positions. Car rides the track well with Andre damper's working excellently, no rolling and we have not found it necessary to remove any rear mud-guard's. F.Dodd. | ||