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).
Test for cylinder distortion and running an engine without water between the bores to increase displacement.
| Identifier | ExFiles\Box 86\1\ scan0183 | |
| Date | 13th January 1936 | |
| X219 To RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}6/KW.13.1.36. Cylinder Distortion and Water Between the Bores. We want to carry out a test to see whether we can run satisfactorily without water between the bores, as this would enable us to increase existing engine displacements without adding to their length. Confirming our conversation, we shall be glad if you will look into the amount of increase that we can get from the present large bore spread centres Bentley engine if we dispense with water between the bores. The suggestion is that we should treat this engine in exactly the same way as we did the 3 1/4" bore original units; i.e., leave the water tubes and cylinder studs where they are and run a cutter down the outside of the bore casting where it bumps into them. If possible we should like to get up to 3.750, and we hand you herewith a gasket off an American engine, showing the limits to which they go in cutting down the space between the bores. We shall be very glad if you could push this job along. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||