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).
Design position report listing modifications and their status for various chassis and engine models.
| Identifier | ExFiles\Box 30\3\ Scan081 | |
| Date | 4th February 1935 guessed | |
| ITEM. (2) DESIGN POSITION. 20/25 HP. CHASSIS - CONTINUED:- Modified carburetter with revised throttle. Completed. Hypoid rear axle - lower gear ratio. Completed. Modification to front apron. Completed. Mud cover for front end of frame side members. In hand. Propeller shaft for hypoid axle (lower axle ratio). In hand. PHANTOM II TANK ENGINE. Panel type air cleaner. In hand. Mods. to water pump and drive. In hand. PHANTOM II CHASSIS. Mud cover for front end of chassis side members. In hand. SPECTRECodename for Phantom III CHASSIS. Single piston quadruple downdraught carburetter. In hand. External mods. to cylinder head to facilitate enamelling. In hand. | ||