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).
'sweetness of running' in engines, focusing on balance and compression.
| Identifier | ExFiles\Box 19\7\ Scan015 | |
| Date | 22th September 1910 | |
| [Handwritten: L Guard book] R.{Sir Henry Royce} 2554 (100M) (P 355. 18.8.10) E.P. 7252. 22nd Sept. 1910 Re Engines. XY90 C.J. 22/9/10 R5/D22910 Referring to the sweetness of our old engines, we need not worry much over this except by getting the high compression ones altered as soon as possible. The sweetness of running depends upon 1. Good balance. (always good but this has been still improving) 2. Low compression. (This was raised to get more power and in raising it, evidently more than was wise, we made manifest the third requirement viz.- 3. The compression ought to be exactly alike. The higher the compression the more difficult this is to get right, as any small variation is exaggerated. The faults have now been removed in the cars we are turning out, but referring to 1400 onward, we are getting in a bigger | ||