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).
Advantages of pistons with low-set rings.
| Identifier | Morton\M11\ img202 | |
| Date | 11th September 1919 | |
| TO EH. from R.{Sir Henry Royce} Copy to CJ " " BN.{W.O. Bentley / Mr Barrington} " " EFC. ORIGINAL D R7/G27/8/19. 2 X.2748 RE PISTONS. RECEIVED 11 SEP 1919 With reference to the pistons with rings low down, it was intended that the piston above the ring should fit the cylinder as closely as possible. The object of the low position of the ring was that they were protected from the heat, and not so liable to get gummed in the grooves, would better keep the oil from working into the combustion chamber, would hold the gas better, and would wear in their grooves less. In fact, there will be many advantages, providing that they are found to have no serious disadvantage. R.{Sir Henry Royce} | ||