Future changes to the Wraith exhaust system's corrujoints.
| Identifier | ExFiles\Box 8\8\ 08-page85 | |
| Date | 19th April 1939 | |
| 623 Mx. {John H Maddocks - Chief Proving Officer} c. Rm. {William Robotham - Chief Engineer} c. Ds. (crossed out) c. BY {R.W. Bailey - Chief Engineer} /NS. {Norman Scott} (crossed out) c. RHO (crossed out) WYMAN WRAITH EXHAUST SYSTEM. RE: CORRUJOINTS. I have arranged that in future :- (a). We use flat joint in place of spherical. (b). Use a distance piece to remove the spring washer from direct heat. (c). Reduce the thickness of corrujoint, as suggested by Mx. {John H Maddocks - Chief Proving Officer} to .015 over the actual thickness of the material from which the joints are made. This .015 allowance will be covered if reduced by heat and pressure by the elasticity of longer bolt. (d). Put bolt in from bottom as part of lower assembly. BY. {R.W. Bailey - Chief Engineer} [Handwritten red initials 'Rm {William Robotham - Chief Engineer} ' are written over sections b and c] | ||
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).