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 data comparing a standard carburettor with a semi-expanding carburettor on a 22-EX vehicle.
| Identifier | ExFiles\Box 149a\2\ scan0025 | |
| Date | 1st July 1932 guessed | |
| -3- 22-EX Standard Carb. Lap Speed Cut out closed 80.2 M.P.H. " " " " Open 83.99 M.P.H. 1/2 mile " " Closed 79.6 M.P.H. " " " Open 82.57 M.P.H. 22-EX R.R. Semi-expanding Carb. Lap Speed Cut Out Closed 83 M.P.H. " " " " Open 84.7 M.P.H. 1/2 mile " " Closed 86.96 M.P.H. " " " Open 85.71 M.P.H. 114º Camshaft W.W. 5.25 C/R.{Sir Henry Royce} P.II Long Type Silencer. Low Rating springs, hydraulics only. Hs{Lord Ernest Hives - Chair}/A.J.Lidsey. | ||