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).
Series of graphs illustrating the effects of a crankshaft balancer on torsional harmonic vibrations under various tuning conditions.
| Identifier | ExFiles\Box 125\1\ scan0307 | |
| Date | 12th February 1936 | |
| TORSIONAL AMPLITUDE, 1, SIXTH HARMONIC, THIRD HARMONIC, BARE SHAFT, PROPERLY TUNED BALANCER, 2, SPRINGS TOO WEAK, 3, SPRINGS TOO STIFF, 4, CORRECT FREQUENCY, EXCESSIVE DAMPING, 5, CORRECT FREQUENCY, INSUFFICIENT DAMPING, SCHMIDT, EUGENE DIETZGEN CO., NO. 346-20 EDCO EFFICIENCY 20 X 20 PER INCH | ||