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).
Pair of 4 port heads and a pair of deturbulated and modified heads for a Phantom III.
| Identifier | ExFiles\Box 93\4\ scan0091 | |
| Date | 30th November 1936 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} J 919 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}20/AP.30.11.36 PHANTOM III. Will you please put in hand a pair of 4 port heads to E.87735 also a pair deturbulated and modified to Rm.{William Robotham - Chief Engineer}241. RM.{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||