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 on camshaft materials, machining processes for cast iron engines, and plans for future testing.
| Identifier | ExFiles\Box 148\2\ scan0014 | |
| Date | 18th October 1938 | |
| -2- Rm{William Robotham - Chief Engineer}10/R.18.10.38. We do not want to stop experiments on cast iron camshafts, but should like sufficient steel shafts to be made to cover all engines. This will avoid hold ups. If these are brought up to the point where cams are unmachined, we can instruct them as and when we finalise the timing. We should also like to try the 3rd cast iron camshaft, which you tell us exists, with the bronze pump drive, which you have machined. Briefly, now that we have had a preliminary run and the cost figures, we should like to increase our instructions of cast iron engines from three to six, with one set of spares, with the following exceptions:- (1) Only four cylinder head to be completed. (2) Valve seats should not be machined at all, except on the first three engines, as instructed. (3) Camshafts should be brought up to the cam form machining only. We shall, in the immediate future, wish to try out the cast iron engine on the road in a B.III. Will you, therefore, please prepare a set of engine mounting parts as per the attached note. Now that we have got main engine results which justify proceeding with the High Power head, we are particularly anxious to get the single cylinder parts instructed in By/Ald{F. Allwood - Experimental Design}16/G.5.10.38. through. Working on the single to try out modifications saves making six off each part and so eases the shop machining capacity. Rm.{William Robotham - Chief Engineer} | ||