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).
Research and development for the Phantom III chassis, discussing cylinder heads, valves, passages, and cooling systems.
| Identifier | ExFiles\Box 161a\4\ scan0166 | |
| Date | 19th November 1936 | |
| 2917 SWDL{Len H. Swindell}, STEEDMAN, EDWARDS Please note - Rm.{William Robotham - Chief Engineer} Sg.{Arthur F. Sidgreaves - MD} and Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} E.1/HP.19.11.36. c. Rm.{William Robotham - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} BY.{R.W. Bailey - Chief Engineer} Ds. EV.{Ivan Evernden - coachwork} Hdy.{William Hardy} JNR.{Charles L. Jenner} PSN. FILE Research and Development - Chassis. Report on discussion of E.1/HP.5.10.36. Phantom III. Cylinder - Valves and Passages. The four port head is the answer to improving the valves and passages on Phantom III engine, and the continental version of this is fitted with larger valves. Swdl.{Len H. Swindell} When do we get delivery? | E/Psn. is to instruct a modified timing with less overlap to improve slow running, and the intention is to instruct two camshafts for test with different degrees of reduced overlap. The four port head has improved oil drainage compared with present standard. Swdl.{Len H. Swindell} | Past results have indicated that larger valves have required a turbulent head to make up for loss of valve turbulence. Rm.{William Robotham - Chief Engineer} now reports that larger valves are quite satisfactory with de-turbulated head, and that slow running and smoothness improved. The experiment running a Bentley head without middle studs has shown leakage between the combustion chambers. This does not rule out a four stud head but shows that there is a critical pitch line spacing which must not be exceeded in designing a four stud head. Design to consider. Swdl.{Len H. Swindell} Is this detailed yet? | Phantom III Cooling System. The design work for taking all the cooling water fr the front end of cylinder head and eliminating water rails is instructed. | ||