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).
Two modifications to the B.60 cylinder head.
| Identifier | ExFiles\Box 123\5\ scan0265 | |
| Date | 24th January 1939 | |
| 104H To B?/Ald.{F. Allwood - Experimental Design} Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards}1/JH.24.1.39. B.60 Cylinder head We send you herewith two modifications to the B.60 cylinder head, and we should be glad if you would mark up prints in order that the sketch Fig. I may be produced as soon as possible. These sketches have been produced with a view to utilising existing patterns, and the principle alterations involve lifting the seating of the valve by .125" and modifying the roof of the combustion chamber. The former alteration will involve a new set of valve seats, with a reduced thread depth. Fig.II is a modification to Fig.I which should be detailed (the sketch herewith is probably sufficient) and instructed as soon as tests on the first head are completed. Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} | ||