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).
Explaining why piston rings on Cast Iron Pistons are not carried as far down as on aluminium pistons.
| Identifier | ExFiles\Box 77\3\ scan0224 | |
| Date | 9th January 1920 | |
| To R.{Sir Henry Royce} from Da.{Bernard Day - Chassis Design} c. to Bn.{W.O. Bentley / Mr Barrington} Da{Bernard Day - Chassis Design}9/EF9.1.20. In sending you the drawings of Cast Iron Pistons we ought to have added that we do not carry the Rings so far down as is done in the aluminium Pistons because it adds to the weight of the Piston as one cannot take the metal out behind and above the rings. Da.{Bernard Day - Chassis Design} | ||