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 from a Test Department report regarding piston rattles and the status of chassis with various piston types.
| Identifier | ExFiles\Box 77\3\ scan0063 | |
| Date | 22th March 1920 | |
| X3732. Extract from Bn{W.O. Bentley / Mr Barrington}1/W22.3.20. X.2748. RE PISTON RATTLES. X.3732. The Test Dept. reported that 33 chassis had been delivered and were now fitted with the old-type non-split aluminium pistons which have also of course a fine clearance on the top band. In anycase these pistons will be changed for the latest split type and the large clearance will at the same time be embodied: 14 chassis have been delivered and are at present fitted with old-type split aluminium pistons, which also have the fine clearances on the top band. About 75 chassis have been delivered with pistons having our latest recommendations regarding increased clearances on the top band. In addition there are 130 chassis on test and 250 engines built and building in the shops with the pistons in the same state. | ||