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).
The new features of the 4.EX experimental chassis and its planned testing.
| Identifier | ExFiles\Box 78\1\ scan0039 | |
| Date | 27th February 1920 | |
| X.3583 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to En. Hs{Lord Ernest Hives - Chair}2/LG27.2.20. X.3Y64 RE 4.EX CAR. I propose to bring 4.EX chassis (the latest experimental chassis) to West WitteringHenry Royce's home town next week. This chassis is fitted with the following new features - X.3563 1. Thermostat Control. X.3Y54a (crossed out) 2. Cast Iron Pistons - split type. X.3690 (crossed out) 3. Magneto fixed at an angle. X.3699 4. Serrated Magneto Drive. (crossed out) X.8738 5. Pinned tappets. X.3444 6. Double valve springs. X.3943 7. Dunlop wheels - 3 fitted with Firestone and 3 fitted with Stanwell demountable rims. X.3944 J X.3895 8. Straight sided tyres. X.3659 This car is also to have the Earthed Wiring Scheme fitted but owing to modifications this will not be on. We shall run the car down fitted with an ordinary 2-seater test body. Hs.{Lord Ernest Hives - Chair} | ||