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).
Extract detailing alterations to the 500 40/50 chassis regarding aluminium pistons.
| Identifier | ExFiles\Box 35\2\ scan 038 | |
| Date | 17th December 1918 | |
| X.2748. Extract from EH1/LG17.12.18. Alterations to 500 40/50 Chassis. (2) Aluminium pistons of the die cast type with the gudgeon pin centres made to suit the standard length connecting rod. | ||