Diagrams showing crankshaft torsional vibration at different RPMs for aluminium and cast iron pistons.
| Identifier | ExFiles\Box 174\2\ img251 | |
| Date | 11th July 1934 | |
| Top row: 1300 1700 2600 3500 Ex 1736 11/7/34 4000 R.P.M. ALUMINUM PISTONS No DAMPER Bottom row: 1300 1700 2600 3500 Ex 1736 11/7/34 4000 R.P.M. CAST IRON Pistons No DAMPER | ||
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).