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).
Feasibility of adapting a four-port head from the Wraith head.
Identifier | ExFiles\Box 134\1\ scan0039 | |
Date | 8th November 1937 | |
-2- Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards}5/MH.{M. Huckerby}8.11.37. arrangement of the exhaust system were adopted. It would appear, therefore, that a four port head can be adapted from the Wraith head without altering anything such as push rod or stud centres, with, however, a slightly modified inlet port, and staggered valves to give good water space between the inlet and exhaust ports, and in view of the gain experienced on the O.H.C. engine with twin manifolds, this construction would probably be worth while. Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} | ||