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).
Diagram showing the amplitude of torsional oscillation due to harmonics of gas pressure torque at full throttle.
| Identifier | ExFiles\Box 132\1\ scan0012 | |
| Date | 18th April 1927 | |
| TORSIONAL VIBRATIONS :- STD 20 RR WITHOUT DAMPER DIAGRAM SHEWING AMPLITUDE OF OSCILLATION DUE TO HARMONICS OF GAS PRESSURE TORQUE AT FULL THROTTLE. THE STD DAMPER DEALS EFFECTIVELY WITH THESE EXCEPT THE OSCILLATION AT 3300 R.P.M. TORSIONAL DEFLECTION AT END OF CRANKSHAFT DEGREES 'MASTER' VIBRATION HARMONICS OF 6TH GAS TORQUE ENGINE RPM M.P.H 18TH 15TH 12TH 9TH aek | ||