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).
Engine preignition issues at a specific compression ratio and proposed testing methods.
| Identifier | ExFiles\Box 19\7\ Scan129 | |
| Date | 28th March 1929 guessed | |
| contd :- -3- At the moment we can say that we cannot operate with a compression ratio of 5.6/1 due to preignition troubles. We are combining experiments and are arranging thermo couples attached to the copper washers under the plugs. Aero plugs will be used to eliminate pre-ignition and the temperature of this particular part of the cyl. head can be recorded. A similar test will be made on the standard cast iron 20 HP. head so that we may observe if there is any appreciable temperature difference between the two engines. Hs{Lord Ernest Hives - Chair}/A.C.Lovsey. | ||