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).
Comparative diagram analyzing different axle and steering pivot arrangements in order of steering heaviness.
| Identifier | ExFiles\Box 95\1\ scan0430 | |
| Date | 19th August 1937 guessed | |
| E.A.C. V SERIES SILVER GHOST T SERIES EXPT. AXLE WITH WIRE WHEELS. V SERIES PIVOTS. NEW AXLE NEW PIVOTS C2 SERIES EXPT AXLE WITH DISC WHEELS V SERIES PIVOTS. ① 6° .616 ② 5° .554 ③ VERT. 3.5" ④ 2.5° ⑤ VERT 1.0" CENTRE POINT AXLES IN ORDER OF HEAVINESS OF THE STEERING HEAVIEST ON THE LEFT. (1 & 2) THESE ARE VERY MUCH HEAVIER THAN THE OTHER THREE. (3) PRESUMABLY THIS ARRANGEMENT SUFFERS SOMEWHAT FROM "CROSSWINDING" OF THE PIVOT DUE TO LARGE AMOUNT OF OFF-CENTRE. (4 & 5) THERE IS VERY LITTLE TO CHOSE BETWEEN THESE TWO AXLES FOR LIGHTNESS. POSSIBLY THE CENTRE POINT STEERING MAKES (5) THE VERTICAL PIVOT AXLE FEEL A LITTLE HEAVIER THAT IT OTHERWISE WOULD. | ||