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).
Table showing weight savings by comparing axle components between models EAC. 7 and 40/50.
| Identifier | ExFiles\Box 71\2\ scan0192 | |
| Date | 2nd November 1927 guessed | |
| WEIGHT SAVING INDEPENDENT OF TYPE OF AXLE CONTROL. ITEM. EAC. 7. 40/50. WT. SAVING. Camshafts and camshaft mounting with brake carrier plates and brake shoes. (EAC. 7. spring pads omitted.++) 59++ 108.9 49.9 Differential and crown wheel assembly. 47 49.75 2.75 Brake drums. 52 61 9 Axle tubes. 54 59 5 Driving shafts. 30 29.75 .25 Spring carrier bracket not included on EAC. 7. with carrier plates. 14.9++ 66.9 14.9 52.0 Amount saved previously tabulated. 27.7 79.9 Total axle wts. of everything behind the gearbox. 487.3 563.6 76.0+ ++ This weight on EAC. 7. is transferred from the frame to the axle together with 8 lbs. of spring clips. + The discrepancy of 3.7 lbs. we consider may be due to experimental cumulative errors in weighing. contd :- | ||