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 19EX at water temperatures of 60°C and 70°C.
| Identifier | WestWitteringFiles\V\October1930-February1931\ Scan042 | |
| Date | 5th November 1930 | |
| RM{William Robotham - Chief Engineer}: Acceleration Tests on 19EX. At water temp of 60°C. 10-30 MPH | 5.16 secs. 20-30 . | 5. . 30-40 . | 5.05 . 40-50 . | 5.95 . average taken both ways. At Water Temp of 70°C 10-30 MPH | 4.95 secs. 20-30 . | 4.45 . 30-40 | 4.95 . 40-50 | 5.9 . average taken both ways. F.{Mr Friese} Dodd. | ||