Instructions for comparative bore wear tests on a Wraith III unit and exhaust system investigation on a No. 2 Bed unit.
| Identifier | ExFiles\Box 155\2\ scan0204 | |
| Date | 2nd March 1938 | |
| -3- WRAITH III NO.1. This unit is being fitted with special cylinder liners (Phosphur Chrome v Sheepbridge) for comparative bore wear tests etc. on rig. Investigate and report on piston failures on Wraith No. 2 unit during its endurance. NO. 2 BED. B.23 UNIT. Rm {William Robotham - Chief Engineer} /Les. Continue investigation of exhaust system. Report to date is required. Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} | ||
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).