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).
The manufacture of plain exhaust manifolds for a Phantom III for testing purposes.
| Identifier | ExFiles\Box 93\1\ scan0050 | |
| Date | 12th November 1936 | |
| 323 To HPS{Horace Percy Smith - Experimental Factory Mgr}, from Rm{William Robotham - Chief Engineer}/Whym Rm{William Robotham - Chief Engineer}/Whym.9/AP.12.11.36. Phantom III. Exhaust System. Will you please instruct for 2 pair of plain exhaust manifolds i.e. without ribs for test purposes. We would like one to be exact to LeC.4544 with a wall thickness of .250" and the other one to have a wall thickness of .150", the metal to be left off the inside of the pipe thus increasing the inside diameter of the manifold by .200" Rm{William Robotham - Chief Engineer}/Whym. | ||