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).
Instructions regarding modifications to B.80 conventional engine patterns, including an alternative high-power top and expansion allowances.
| Identifier | ExFiles\Box 123\5\ scan0311 | |
| Date | 21th February 1939 | |
| 104H HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm.{William Robotham - Chief Engineer} c. Sft{Mr Swift}/EW. Rml/R.21.2.39. We shall be glad if you will now instruct the B.80 Conventional engine patterns. With regard to the alternative high power engine top to be available for this crankcase, we shall be glad if you will not instruct this for the time being, as we are making some modifications which we wish to be incorporated in the final pattern. crankcase X We should like the/patterns to be made with an expansion allowance intermediate between cast iron and aluminium so that we can get a cast off in either material. We understand that this is possible as Leylands have just done this with their new experimental 'Cub' engine. Rm.{William Robotham - Chief Engineer} x The conventional head will always be cast iron. | ||