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 building up the EAC.I. 'D' type chassis, number 9.EX.
| Identifier | ExFiles\Box 71\3\ scan0180 | |
| Date | 13th October 1925 | |
| To Hs{Lord Ernest Hives - Chair} from RHC.{R. H. Coverley - Production Engineer} X8920 RHC{R. H. Coverley - Production Engineer}4/BE. 13.10.25. RE EAC.I. We are building up EAC.I. "D" type Chassis to the following specification:- Chassis Number will be 9.EX. 1. FRAME Original EAC.I. Frame to N.Schemes 1373-5-6 & LeC 1676 with Goshawk type Rear Axle Control and Gear Box Members modified as mentioned in No. 8. 2. RADIATOR EAC.I. type Radiator with Horizontal Integral Shutters and Goshawk type mounting to N.S. 1445. 3. FRONT AXLE EAC.I. Front Axle which has 7½° angle of Pivot ( instead of present standard 6°). Spring Seats on this Axle are narrower in centres than present standard. Brake Gear & Operating Mech: has been modified to conform to present standard. 4. REAR AXLE Original EAC.I. Rear Axle complete to N.S.'s 1360 & 1396. 5. FRONT SPRINGS We are using 48" Front Springs with EAC.III fixing, Shackle at front and box bracket at rear. 6. REAR SPRINGS 72" Rear Springs in accordance with N.Scheme 1421. 7. STEERING COLUMN Latest type of Steering Column with Universal mounting for Steering Nut and fixed to frame same as present standard. 8. ENGINE Originally the instructions for this Chassis were for the Engine to be mounted on Subframe, but owing to the design for Rear Suspension not being completed we are using a "V" Series Engine. The Rear Suspension is the same as present practice. The Pressed Steel Crossmember at the front has been modified and made box shape to take "V" Series Cross Bar Front Suspension. Line of transmission remains the same. 9. GEAR BOX The original instruction was for a 3 speed Gear Box to LeC 1677-9. Whilst the details for the Box were finished the design for Servo and Engine coupling was never completed. We have therefore adapted an EAC.II Gear Box with -contd- | ||