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).
Design investigation and testing plan for four-valve camshaft heads and Pent-House aero engine heads.
| Identifier | ExFiles\Box 82\4\ scan0154 | |
| Date | 16th September 1935 | |
| - sheet 2 - E.2/HP.16.9.35. between cylinder bores which increases the length of the engine approximately 3". (6) E/Tsn. will also make a design investigation into a four valve 2 camshaft head, with one or two central sparking plugs and will try out a scheme for machining a head on this type of cylinder by turning it spherical and machining recesses for the valve heads. With the latter the head should be arranged as a shallow Pent-House with side plugs so as to be suitable for integral cylinder head and block construction, all in cast iron, the valves being withdrawable through the cylinder bore. (7) Wd.{Mr Wood/Mr Whitehead} will make a test of the steel Pent-House and steep aluminium Pent-House aero engine heads for detonation at low speed. E.{Mr Elliott - Chief Engineer} | ||