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).
Modifying instructions for Phantom III cylinder heads, specifically regarding increased diameter exhaust valve stems.
| Identifier | ExFiles\Box 93\4\ scan0022 | |
| Date | 15th October 1935 | |
| x319 To RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}28/KW.15.10.35. Phantom III. We wish to modify the note sent through with regard to the cylinder heads required by us to Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}3/KW.11.10.35. The exhaust valves to have the increased dia. stems to LeC.4711, otherwise the instructions for them in S/SLV and copper plated on one head still stands. Hs{Lord Ernest Hives - Chair}/L.H.Swindall. | ||