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).
Comparison of mean way acceleration times for vehicles 25-EX, 19-EX, and 27-EX.
| Identifier | ExFiles\Box 113\2\ scan0180 | |
| Date | 8th August 1933 | |
| X1725 8.8.33 P.II. ACCELERATIONS. 25-EX. 5-1 c/r.{Sir Henry Royce} old type camshaft, 11x41 axle, old type carburetter. Complete car wt. 48¾ cwt. 19-EX. 5¼-1 c/r.{Sir Henry Royce} new type 114º camshaft. 12x41 axle. Semi expanding carburetter. Car wt. 49½ cwt. 27-EX. 48¾ cwt. 11 x 41 axle. 5¼ c/r.{Sir Henry Royce} 114º camshaft. Semi expanding carb. | SPEEDS. | MEAN WAY ACCELERATIONS. | | | |---|---|---|---| | | 19-EX. | 25-EX. | 27-EX. | | 10-20 | 5.1 | 4.1 | 8.8 | | 20-30 | 4.9 | 4.3 | | | 30-40 | 4.8 | 4.5 | 10.8 | | 40-50 | 6.0 | 5.7 | | | 50-60 | 7.8 | 6.4 | 17.2 | | 60-70 | 10.4 | 8.6 | | Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||