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).
High-speed wobbles for car 98-NK under different tyre and suspension configurations.
| Identifier | ExFiles\Box 29\1\ Scan145 | |
| Date | 20th October 1925 | |
| R.R. 493A (50x) (D.B. 175 25-9-24) J.H.D. 457 REF. Hs{Lord Ernest Hives - Chair}/RB.{R. Bowen}20.10.25. EXPERIMENTAL REPORT. Expl. No. HIGH SPEED WOBBLES - 98-NK CAR. Very stiff front springs - low geared steering. Standard 33 X 5 high pressure tyres at 45 lbs/sq.in. Slight wobble starts at 68 m.p.h. but does not build up. Ditto - at 35 lbs/sq.in. Period 68 - 69 - 68 m.p.h. does not build up and intensity only slight. Slight tendency to wobble at 75 m.p.h. 33 X 6.7 balloon tyres at 20 lbs/sq.in. Period 52 - 70 - 48 m.p.h. Intensity violent and worst at about 60 m.p.h. Ditto - with standard shock absorbers at 50 lbs. Very slight tendency to wobble at 70 m.p.h. but hardly distinguishable from road shocks. Road shocks with these springs in spite of low geared steering, are not nearly so bad as anticipated, Hs{Lord Ernest Hives - Chair}/R.Bolton. 17.10.25. | ||