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).
Request to produce a modified turbulent type cylinder head for a Large Bore 25 HP engine.
| Identifier | ExFiles\Box 103\4\ scan0155 | |
| Date | 24th February 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} x579 Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}25/KW.24.2.36. Large Bore 25 HP. Will you please produce a turbulent type of cylinder head E.60660, modified to LcC.5002, in which the turbulent lip is machined away. We wish to recover the compression ratio again to 6 : 1 and this can be obtained by maching .040" off the joint face. The cylinder head capacity should be 128 c.c's. This head to be fitted with :- Ex.21131 Inlet Valves (S/SLU) - .310 stems. Ex.21132 Exh. " (KE-965)- .342 stems. E.60824 Inlet Valve Wedges. E.60420 Standard Valve Springs. Hs{Lord Ernest Hives - Chair}/L.H.Swindall. | ||