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).
Weight comparison of two different types of crankshafts.
| Identifier | ExFiles\Box 88\3\ scan0137 | |
| Date | 22th March 1935 | |
| X258 22.3.35. Crankshaft Weights. lbs. ozs. Narrow Pin Type, Ex.1408 47 6 Standard Bentley, EB.1083 45 6 Difference in weight = 2 0 | ||