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).
Test result memo detailing engine timing adjustments to reduce torque reaction vibrations.
| Identifier | ExFiles\Box 14\5\ Scan241 | |
| Date | 25th September 1931 guessed | |
| Files. X7005 X7770 24-GX+ Original timing, degrees from standard - No.1 cyl. I.O. I.C. E.O. E.C. 1°L. O.K. 1°L. O.K. Made one tooth later approx. 7½° for the attention of Mr.Robotham. This is the result of a successful test to reduce torque reaction vibrations by altering the timing one tooth later. Rm.{William Robotham - Chief Engineer} | ||