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).
Acceleration test results for vehicle 18. G. IV, comparing performance with and without an air silencer.
| Identifier | ExFiles\Box 5a\3\ 03-page238 | |
| Date | 25th May 1933 | |
| To Hs.{Lord Ernest Hives - Chair} From G.T.H. X 5440 Hotel de France. Chateauroux Indre. 25.5.33 ACCELERATION TESTS 18. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} IV. (Average for 4 runs) WITHOUT AIR SILENCER M.P.H. TIME 10-20 5 sec 20-30 5.5 " 30-40 7.2 " 40-50 8.9 " 50-60 13.3 " WITH AIR SILENCER FITTED M.P.H. TIME 10-20 4.9 sec 20-30 5.95 " 30-40 6.85 " 40-50 8.15 " 50-60 12.65 " [Signature] | ||