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).
List of cancelled experiments relating to engine crankcases and pistons.
| Identifier | ExFiles\Box 37\2\ scan 151 | |
| Date | 5th June 1918 | |
| X.3/83 EFC/AT5.6.18. The following experiments may now be cancelled.- X.2705.- [Struck through text] Lightened top half of crankcase incorporating X.2728.- Crankcase main bearings in aluminium with easily machined bridge pieces, also X.2729.- Bottom Half. X.2783.- Pistons E.9076 in Levett metal. X.2980B. Pistons with 5 rings to Lec.808 - Supersheet E.14381. X.3177.- Pistons with 93% alumin: 7% copper. X.3183.- Pistons with 93% alumin: 7% copper & .5% magnesium. EFC. | ||