The Wraith III gear change mechanism, specifically scheme GCD.331.
| Identifier | ExFiles\Box 8\11\ 11-page110 | |
| Date | 20th January 1938 | |
| To BY {R.W. Bailey - Chief Engineer} /NS. {Norman Scott} c. to HPS. {Horace Percy Smith - Experimental Factory Mgr} 628? Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} 11/JH.20.1.38. WRAITH III - GEAR CHANGE MECHANISM TO SCHEME GCD.331. Considering the modifications at present being made to the fully isolated change speed lever, owing to its being unsatisfactory on 26.G.VI. will By {R.W. Bailey - Chief Engineer} /NS. {Norman Scott} please say if it is worth while detailing the scheme to GCD.331 in its present form. Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} | ||
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).