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).
Comparison of five different axle and pivot configurations, ordered by steering heaviness.
| Identifier | ExFiles\Box 155\1\ scan0065 | |
| Date | 28th January 1933 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° 1.0" 5) VERT 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 "CROSS WINDING" 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. | ||