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).
Specification list for the Wraith III model, detailing parts not yet released for production and their current status.
| Identifier | ExFiles\Box 6\6\ 06-page289 | |
| Date | 21th August 1937 | |
| Rm.{William Robotham - Chief Engineer} 600 DA.{Bernard Day - Chassis Design}6/G.21.8.37. WRAITH 111 - SPECIFICATION. PARTS NOT YET RELEASED FOR PRODUCTION. (1). Threaded Shackles - Rear End of Rear Springs. Design required. (2). Bell Crank Lever on Front Yoke Piece. To be examined. (3). Rear Engine Suspension. Type not finally decided on. (4). Engine Controls. Revision for high engine mounting. (5). Petrol Pump. Question of mechanical or electrical pump and position. (6). Ignition Control. Question of retaining or deleting hand control or octane selector. Whether on column or instrument board. Require reconsideration on account of movement. (7). Front Jack Brackets. Nuts have had to be reduced to accommodate Ph.111 jacks. (8). Rear Spring Pad. Revised fixing of shock damper ball end. (9). Steering Column. Clearance of lubrication fitting with crankcase. (10). Petrol system, including filter. Design required. Not decided on. (11). Front Brake Shoes. C.I. Drums. Shoes to have tipping shoes. Design in progress. (12). Propeller shaft. Resonance. Investigation in progress. (13). Side spare wheel carrier. Tieing to Dash. Design required. (14). Gear Box. Bronze cones instead of C.I. Spiral oilways. Spigot bearing like P.111. Coarse or Fine Pitch Gears. (15). Gear Change Mechanism - Larger Shaft. Design in progress. (16). Spring Drive. Certain improvements innumerated in Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} 15/19.8.37. to be incorporated. (17). Cylinder Head. The boss carrying rocker shaft may be modified. Experiments in progress. (18). Silencer and Exhaust System. Not yet decided on. DA.{Bernard Day - Chassis Design} | ||