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).
Preparations for road and bench testing three different engine heads with a specific compression ratio.
| Identifier | ExFiles\Box 17\6\ Scan011 | |
| Date | 10th December 1926 guessed | |
| Contd :- -7- [strikethrough]Further general information[/strikethrough] we are preparing for road test three heads - the standard cast iron, the original alum. and the alum. one with the larger deflecting surfaces - and arranging for each to have the same compression ratio of about 4.65 to 1. We shall also continue bench tests with the latter mentioned head and intend trying this type with one deflecting side removed. Hs{Lord Ernest Hives - Chair}/A.{Mr Adams} C. Lovesey. | ||