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).
List of design modifications and their completion status for the Spectre chassis.
| Identifier | ExFiles\Box 30\4\ Scan307 | |
| Date | 4th October 1934 guessed | |
| - 3 - ITEM DESIGN POSITION ----------------- ------------------- SPECTRECodename for Phantom III CHASSIS. Alternative short duration camshaft and valve springs to suit. Completed. Filter for auto adjusting tappets - to suit existing engines. Completed. Modifications to central web of crankcase to facilitate In hand. removal of sand. Larger water pump with carbon Thermoflex gland. In hand. Distribution board without cutout. In hand. Vacuum control for ignition distributors. In hand. External modifications to cylinder head to facilitate In hand. enamelling. Lightened valves with spring retaining ring. Completed. Gearbox:- Modification to oil duct feeding reverse gear rear Completed. bearing. Gearbox:- Modification to rear bush for reverse shaft. Completed. Gearbox:- Modification to facilitate assembly and dismantling. Completed. Spring loaded valves in damper governor pump. In hand. Alternative front appearance. In hand. Modified single plate clutch (with sheet metal cover plate). In hand. | ||