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).
Modification to exhaust ports to improve valve cooling for B.60, B.80, and large bore engines.
| Identifier | ExFiles\Box 123\5\ scan0155 | |
| Date | 10th November 1938 | |
| DE/MS c. Rm.{William Robotham - Chief Engineer} 10HH DA.{Bernard Day - Chassis Design}2/G.10.11.38. Files B.60, B.80 and LARGE BORE. SWDL{Len H. Swindell} Arrange Please receive herewith PD.266 shewing modified exhaust ports to improve the cooling of the valves by making the coolant reach nearer to the top ofthe valve. This can be tried with and without sodium cooled stems, provided that the diameter is the same, that is .375 dia. In regard to when to introduce this modification, it is suggested that after casting two castings for the 8 cylinder, the patterncan then be altered. DA.{Bernard Day - Chassis Design} | ||