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 instructions for the Phantom III Four Port Head Air Silencer.
| Identifier | ExFiles\Box 152\3\ scan0199 | |
| Date | 4th October 1937 | |
| E. {Mr Elliott - Chief Engineer} Dept. c. Rm. {William Robotham - Chief Engineer} c. Tool Planning. 1297. DA. {Bernard Day - Chassis Design} 1/G.4.10.37. WYMAN O.K Gray PHANTOM 111. FOUR PORT HEAD - AIR SILENCER. Referring to Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} 1/AP.21.9.37. will you please delete the air silencer stays, and remove the bosses from the induction pipes. The number of rivets E.18305 round the end plate to be increased from 8 to 16. The Stiffener E.88076 should also be removed from the silencer. DA. {Bernard Day - Chassis Design} | ||