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).
Testing of Ricardo and Zephyr type pistons in different materials.
| Identifier | ExFiles\Box 77\3\ scan0205 | |
| Date | 1st January 1920 | |
| Contd. X.2974' -2- R6/G6.1.20. It might also be advisable to test a set of Ricardo pistons in both aluminium and cast iron, made in accordance with our most recent knowledge. I am inclined to think, however, that some form of collapsable piston in case of sudden or rapid expansion by heat is very desirable, and if this is so, the Zephyr type seems to be the least hopeful, leaving the trunk of Ricardo type with the treatment recently indicated, as being the most likely to give satisfaction. [Stamp] 1904 MADE AT CROXLEY. R.{Sir Henry Royce} [Footer, upside down] R.R. 235 A (100 T) (S.F. 846 6-8-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2400. | ||