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).
Four-port cylinder head experiment for the 25/30 HP engine.
| Identifier | ExFiles\Box 103\4\ scan0185 | |
| Date | 12th November 1936 | |
| 519 - Files - SwDL{Len H. Swindell} EH. C.T.HO. Fm. E/JNR.{Charles L. Jenner}3/HP.12.11.36. 25/30 HP. Cylinder Head. We send you herewith:- LeC.5350 showing a four port cylinder head. LeC.5374 gasket for the above. To achieve our object of increasing the inlet ports we have been obliged to move some of the cylinder studs which will mean that for this experiment a crankcase and cylinder block should be temporarily modified. E/JNR.{Charles L. Jenner} LeC.5350.) LeC.5374 } herewith. | ||