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 various Wraith III units, detailing their components and modifications.
| Identifier | ExFiles\Box 155\2\ scan0269 | |
| Date | 18th November 1938 | |
| -2- WRAITH III NO.3 (24.G.VI.) Obsolete crankcase with loose liner cyl. block. W/M main bearings. Sheepsbridge (original liners). Original type thick section keyed big ends AC.6. Obsolete large valve cylinder head. Chev. type bottom tappets with large cup on rod. Delco ignition distributor. Obsolete type of Fabroil camwheel. WRAITH III NO.4 (RETURNED TO SHOP FOR HOYT'S MAINS) Obsolete type of crankcase which by use of eccentric studs solid cyl. block adapted (.) Chrome). Std. cylinder block with extended water jets. Cylinder head with std. small valve but obsolete construction. Monikrome camshaft (Mid. Cyl. Co.) EB.400 ex B.III No.5 unit. Up-to-date Attwater camwheel. Main bearings W/M (Hoyts) no shims. AC.6 big end bearings obsolete thick section with keyed shims. Delco ignition distributor. WRAITH III NO.5 (28.G.VI.) Obsolete type of crankcase which by use of eccentric studs solid cylinder block adapted. Molybdenum cylinder head std. small valves, but obsolete construction. .030 Klinger cylinder head gasket. Vertical bored tappets with flat faces. Front face of cams machined back leaving .4 cam width. Up-to-date Wraith big ends, but in AC.6. W/M main bearings. Unhardened timing gears with obsolete light Attwater camwheel. WRAITH III NO.6 UNIT (27.G.VI). At present being brought up-to-date. Assembly dependent upon condition. | ||