Modification to the Wraith III rear brakes, involving the substitution of fitting bolts.
| Identifier | ExFiles\Box 7\7\ X 606 Brakes-page065 | |
| Date | 11th August 1937 | |
| SECRET. 601 Copy to Mr Dev Rm. {William Robotham - Chief Engineer} Exptl. W'shop File MARTINDALE E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} 1/M.11.8.37. WRAITH III. REAR BRAKES. We send herewith N.Sch.5163 showing 6 - .312 parallel fitting bolts substituted for the 10 - .250 bolts at present instructed for the Wraith. The brake drums are not now to be easily detachable from the hubs and in consequence the nuts can be secured by centre punching and there need be no stop plate or shoulder on the hub. We understand that the hubs and drums for the car now being prepared for 10,000 mile test are not yet drilled for the bolts, so this modification can be applied to this car without difficulty. Att: N.Sch.5163. E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} | ||
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).