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).
Page showing steering angle curves for a Wraith without a roll rod under various conditions.
| Identifier | ExFiles\Box 9\7\ 07-page100 | |
| Date | 17th December 1937 | |
| -4- The Wraith curve shown in Fig. 1 and Olley's curves shown in Fig.2 indicate exactly the same trouble and cause. This was proved by taking a further set of steering angle curves of the Wraith with no roll rod. These are shown in Fig.3 (1) with tyre pressures 30 lbs/sq.in. rear 25 lbs/sq.in. front. (2) with 30 lbs/sq.in. front and rear. (3) As (2) but with 600 lbs. ballast in rear of car. FIG 3 [Graph Text] Title: STEERING ANGLE CURVES FOR WRAITH WITHOUT ROLL ROD Y-Axis: UNDERSTEER / OVERSTEER X-Axis: SIDEWAYS G Bottom Right Label: Fig. 3 | ||