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 notice for the Phantom III regarding cylinder head oil drainage.
| Identifier | ExFiles\Box 93\4\ scan0113 | |
| Date | 22th March 1937 | |
| 319. Piles. Swdt BY.{R.W. Bailey - Chief Engineer} c. Rm.{William Robotham - Chief Engineer} HPS.{Horace Percy Smith - Experimental Factory Mgr} E/JNR.{Charles L. Jenner}1/HP.22.3.37. Phantom III - Cylinder Head Oil Drainage. We send you herewith LeC.5589 showing a modification to the seating of the inlet valve spring. This consists of increasing the diameter of the recessing to 1.9 diameter, with the object of assisting the flow of oil to the drain pipes. We understand that existing castings will permit of this alteration, there being sufficient metal. Kindly note that this only applies to the inlet valves. E/JNR.{Charles L. Jenner} | ||