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).
Modifications to a Phantom III deturbulated cylinder head by removing lips.
| Identifier | ExFiles\Box 93\4\ scan0075 | |
| Date | 26th October 1936 | |
| 3/8 Swett. Rodes BY.{R.W. Bailey - Chief Engineer} c. Rm.{William Robotham - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} E/JNR.{Charles L. Jenner}4/HP.26.10.36. P.III Deturbulated Cylinder Head. We send you herewith LeC.5343 and LeC.5348 showing the lips removed from the combustion space both for the standard head and the 4-port head. Removing the lips reduces the compression ratio to 5.84 to 1. This should be tried first experimentally, and if it is desired to restore the original compression ratio the height of the chamber must be lowered. The drawings deal with both these modifications. LeC.5343 and LeC.5348 herewith. E/JNR.{Charles L. Jenner} | ||