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).
Status report on the configuration of Wraith III test units No.1 and No.2.
| Identifier | ExFiles\Box 155\2\ scan0268 | |
| Date | 18th November 1938 | |
| 1315 To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} c. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} POSITION OF TESTS BEING CARRIED OUT ON WRAITH III UNITS AND OTHER R.R. UNITS. WRAITH III NO.1 (CYLINDER BORE WEAR TESTS). Obsolete type crankcase with loose liner block. Nos. 1, 2 and 3 liners in sand cast std. RLR. material (A.101). Nos. 4, 5 and 6 " " Ni.Cr.{Mr Cra???ster / Mr Chichester}Md. " (A.103). Monikrome camshaft (Midl.Cyl. Co.) Wraith cam forms. Front face of cams machined back .225 to take vertical flat face tappets. AC.6 big end bearings original keyed thick section. Unhardened timing gears. Original Fabroil camwheel. Obsolete type of large valve head. Delco distributor. WRAITH III NO.2 (UNIT ON RIG, ALLOTTED TO CTS.{C. Trot Salt - Carburation} FOR COLD STARTING). Obsolete type crankcase with loose liner block. Nos. 1, 2 and 3 liners - Sheepbridge Stokes } Centri-cast. Nos. 4, 5 and 6 " - Phosphor chrome Unhardened S/ZN crank and dyno pinions with obsolete Fabroil idler gear. w/k main bearings. Nos.1, 3 and 5 big ends - production thin section with flanges. Nos.2, 4 and 6 " " - " " without " Above in AC.6 material. 3 Con rods with centre hole up rods blanked. .030 Klingerit gasket. 1 - 6 Std. Swedish wire springs. 7 -12 S/CV " " Obsolete large valve cylinder head. Delco distributor. Large rubber dynamo drive blocks SCD.804. | ||