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 modifications for the 6.EX. car model, detailing 23 changes and their origins.
| Identifier | ExFiles\Box 76\4\ scan0118 | |
| Date | 19th January 1923 guessed | |
| LIST OF MODIFICATIONS ON 6.EX. CAR. ORIGIN. (1) Exhaust gas heated throttle with valve in exhaust. R.R. (2) Shock Absorbers. Hartford. (3) Autovac with tank of ample dimensions with suitable fittings to main tank. R.R. (4) Petrol level gauge on tank, of a simple and effective design. R.R. (5) Petrol filler cap on petrol tank - Goshawk type. R.R. (6) Set-up buffers to longitudinal steering tube. R.R. (7) RR Battery ignition comprising coil, ballast resistance, make and break mechanism, condenser, and ignition governor. R.R. (8) RR locked switch box for battery and magneto ignition and lighting of car, including socket connections for inspection lamp, and switch for instrument board light. R.R. (9) Earthed single wire system of wiring. R.R. (10) System of conduits and fittings for the wiring. R.R. (11) Distribution Board. R.R. (12) Automatic dynamo switch. R.R. (13) RR Dynamo. R.R. (14) Breather for the crankchamber connected to the carburetter intake. R.R. (15) RR type Klaxon horn button. R.R. (16) Junction boxes for detachable connection of wiring to ignition and klaxon. R.R. (17) Side spare wheel carrier. R.R. (18) Bonnet handles. R.R. (19) Enots lubricators. Del co. (20) Spring gaiters. (21) Dipping head lamps. (22) Latest design of starter carburetter with control brought to instrument board near driver. R.R. (23) Thermometer. Cambridge. | ||