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 arrangements and their effect on steering heaviness.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan203 | |
| Date | 22th September 1926 guessed | |
| E.A.C. V SERIES. SILVER GHOST T SERIES EXPT AXLE WITH WIRE WHEELS V SERIES PIVOTS NEW AXLE WITH NEW PIVOTS C2 SERIES EXPT AXLE WITH DISC WHEELS V SERIES PIVOTS Diagram 1: 6°, .616 Diagram 2: 5°, .554 Diagram 3: VERT, 3.5" Diagram 4: 2.5°, 1.0" Diagram 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. | ||