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).
Trying out lightened exhaust valves on a Phantom II to reduce valve noise, requiring altered valve guides.
| Identifier | ExFiles\Box 131\4\ scan0242 | |
| Date | 27th May 1937 | |
| To RHC.{R. H. Coverley - Production Engineer} 1113 Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} - Cricklewood, 27.5.37. Phantom II Valve Gear. We are trying out for valve noise lightened exhaust valves. To do this it is necessary to alter the valve guide to suit. Would you please put through 3 doz. E.85506 guides with the bore to drawing E.80298. This means we require the E.85506 guide but with a smaller bore. We are anxious to try this scheme out as soon as possible, please reply. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||