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 test accelerometer record for a 40/50 chassis on a dry, smooth London Road.
| Identifier | ExFiles\Box 113\2\ scan0136 | |
| Date | 26th April 1928 | |
| ACCELEROMETER RECORD Chassis No. 11AL 40/50 Type of Body. Chassis Date 26-4-28 Total 47 cwt Passengers... M.{Mr Moon / Mr Moore} Maddocks. M.{Mr Moon / Mr Moore} Wyer. Rear Axle ratio 14/52 Road conditions. Dry, smooth, London Road. Performance Test Top Gear 16.2 10 M.P.H. 13.8 10 M.P.H. 15.5. 20 M.P.H. 15.9. 30 M.P.H. 15.5 40 M.P.H. 6.8 6.7 1st 6.1 2nd 5.1 3rd From 10 M.P.H 3.1 40 MPH 3.5 30 MPH 3.9 20 MPH 4.2 10 M.P.H. | ||