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).
Scheme for improved engine breathing on the 25/30 HP engine, requiring new parts for an experiment.
| Identifier | ExFiles\Box 101\3\ scan0041 | |
| Date | 30th September 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} X50D Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation}22/KW.30.9.36. 25/30 HP. Development. We send you herewith a scheme for improved breathing on the 25/30 HP. engine. These parts are required to obtain the following information - Would it be worth while modifying the present design of cylinder head, to incorporate larger ports. From a production standpoint, the ports are about as large as they can be. Rm.{William Robotham - Chief Engineer} 230. Cylinder Head. Rm.{William Robotham - Chief Engineer} 231. Induction Pipe. These drawings show the bare requirements for this experiment. Will you please produce these parts, also a modified type of inlet C. & A.{Mr Adams} washer to suit. Hs{Lord Ernest Hives - Chair}/C.T.Salt. | ||