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).
Weight saving comparison table for axle components, independent of the type of axle control.
| Identifier | WestWitteringFiles\R\2October1927-November-1927\ 67 | |
| Date | 1st November 1927 guessed | |
| WEIGHT SAVING INDEPENDENT OF TYPE OF AXLE CONTROL. ITEM. EAC.7. 40/50. Wt. SAVING. Camshafts and Camshaft mounting 59++ 108.9 49.9 with brake carrier plates and brake shoes. EAC.7 spring pads ++ omitted. Differential and crown wheel 47 49.75 2.75 assembly. Brake drums. 52 61 9 Axle tubes. 54 59 5 Driving shafts. 30 29.75 .25 ----- 66.9 Spring carrier bracket not included ++ 14.9 on EAC.7. with carrier plates. 14.9 ----- 52.0 Axle tubes - Amount saved previously 27.7 tabulated. ----- 79.9 Total axle wts. of everything 487.3 563.6 76.0+ behind the gearbox. ++ 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 :- | ||