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).
Application of an engineering principle to various engine types, including a mock-up.
| Identifier | ExFiles\Box 158\3\ scan0005 | |
| Date | 29th August 1939 | |
| -2- Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}2/MH.{M. Huckerby}29.8.39. Claims for this principle applied to aircraft engines were also made, so that the C.R. could be increased at high altitudes with a reduction in consumption, and Mr. Bradburn considered that it could be easily applied to a sleeve valve engine, but also to a 4 valve O.H.V. engine by fitting the control piston in the side of the head. The fitting to the engine demonstrated was in the nature of a mock up, and although a special head had been cast, the bearing brackets and connecting rods were brass castings with no provision for lubrication, but if the principle is sound, a good design with proper lubrication and enclosed to protect from dirt could easily be produced. Attached is a rough diagrammatic sketch of the arrangement. I think a dash-pot would be required. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||