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 vibration, compression standards, and cylinder correction methods.
| Identifier | ExFiles\Box 19\7\ Scan016 | |
| Date | 22th September 1910 | |
| R.W. 2354 (1000) (P 355. 18.8.10) E.P. 7952. 22nd Sept. 1910 C.J. (2) charge at higher speeds, which means more vibration (crankshaft); but I think 1600, 1601, and 1602 are not quite down as low as the new standard. I don't think they were corrected by the latest process and have not been reduced to the 24 L 1/2 + space The present method, introduced a fortnight ago, insures that the cylinders have no air lock and are corrected before they are put on the engine. I think we can safely go down to 25 cubic inches, i.e. 25 1/2 will be an easily remembered standard. What we are aiming at is a low com- pression at low speeds, which is well main- tained when higher speeds are obtained. We have succeeded in this, but it points out that the low speed standard can and should be reduced. As you say, sweetness we must have. - | ||