Accompanying blueprints for a modified Gearbox Oil Filler Plug for the Wraith III model.
| Identifier | ExFiles\Box 8\11\ 11-page101 | |
| Date | 5th December 1938 | |
| ST {Capt. P. R. Strong} /RS {Sir Henry Royce's Secretary} C. Rm. {William Robotham - Chief Engineer} 628 DA. {Bernard Day - Chassis Design} 9/C.5.12.38 A H F.J. HARDY WRAITH III. SECTION 6030. R.SCH. 5075. Please receive herewith the following blueprints :- G.CD.272 Oil Filler Plug - Gearbox. Wraith III. The above scheme shows the washer (which retains the cork in the oil filler plug) held in position by a spring ring, in place of, as at present, rolling over the metal at the end of the plug to hold the washer. The difficulty experienced GW.1621 was that it when rolling over the metal at the screwed end of the dixtampo plug / broke away, due to hardening. 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).