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).
Instruction to machine .060' from a 25 HP cylinder head and ensure standard valves are ground in.
| Identifier | ExFiles\Box 27a\1\ Scan170 | |
| Date | 1st December 1934 | |
| x4013 To RHC{R. H. Coverley - Production Engineer}: Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/KW.1.12.34. 25 HP. Cylinder Head. Will you please machine .060" from the face of this cylinder head. Will you please ensure that the valves and valve springs are standard and that they are ground in, as we are proposing to send this head away almost immediately. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||