The continued use of the original four-port cylinder head for the Phantom III 'D' Series.
| Identifier | ExFiles\Box 93\4\ scan0125 | |
| Date | 5th October 1937 | |
| E. {Mr Elliott - Chief Engineer} Dept. G. {Mr Griffiths - Chief Accountant / Mr Gnapp} Rm. {William Robotham - Chief Engineer} C.C. S. R.H.G. O. {Mr Oldham} I.R. 319. DA. {Bernard Day - Chassis Design} 7/G.5.10.37. PHANTOM 111 "D" SERIES - CYLINDER HEAD WITH FOUR INLET PORTS. In view of Rm. {William Robotham - Chief Engineer} 7/R.4.10.37. will you please instruct Works to carry on hand to mouth, with the original four-port head until such time as the tests on the new head are considered to have given a satisfactory result. The work on the new head should, of course, be continued at full speed. DA. {Bernard Day - Chassis Design} | ||
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).