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).
Alterations to cylinder heads for better oil drainage and a new experimental head with four inlet ports.
| Identifier | ExFiles\Box 93\4\ scan0020 | |
| Date | 30th September 1935 | |
| BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner} c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} RHG. [Signature] x319 E/JNR.{Charles L. Jenner}1/HP.30.9.35. P.3. Cylinder Heads. URGENT. We send you herewith:- LeC.4711 showing alterations to the above which consist of better oil drainage in the head by sloping the roof. The height of the head joint is raised and the rocker cover is held down at intervals by studs. The drawing also shows the larger diameter stems for the valves. Will you please get the patterns altered as soon as possible. We send you also herewith LeC.4729 showing an experimental cylinder head which has four inlet ports. LeC.4711 herewith. E/JNR.{Charles L. Jenner} [Handwritten in red]: LP{Mr Lappin} Smith Should like your comments [Signature] | ||