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).
Report page detailing improvements in vehicle handling and roll, including a graph of steering angle curves for a Wraith.
| Identifier | ExFiles\Box 9\7\ 07-page102 | |
| Date | 17th December 1937 | |
| -5- A marked improvement is shown but the curves still turn over. This, however, occurs above 0.4 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} instead of below 0.3 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} and is therefore less serious. It was found however, that the angle of roll at 0.4 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} had increased from 4.2° to 6.2°, which is greater than the average American car and is undesirable. The Oldsmobile front roll rod was then fitted by a simple adaption. This was shown on the weigh bridges to increase the front roll rating by 51 lbs/ins. and the effect on the road was to give less impression of roll than the standard Wraith with rear roll rod although the measured rating of this was 66 lbs/ins. This is because rear seat passengers are thrown sideways less on an understeering car, when going into a corner. The actual roll ratings were then 169 lbs/ins. front and 162 lbs/ins. rear as measured on the weigh bridges. Curves were then taken of a Wraith fitted up in this manner and are shown in Fig. 4. FIG. 4 [Graph Text] Y-Axis: UNDERSTEER, N.P., 2°, 1° X-Axis: SIDEWAYS G, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 Title: STEERING ANGLE CURVES FOR WRAITH WITH OLDSMOBILE FRONT ROLL ROD AND NO REAR ROLL ROD Labels: ①, ② Bottom Right: FIG. 4 | ||