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 steering wheel effort with Standard Dunlop Fort Tyres & Dunlop Fort 90 Tyres on a 25 HP chassis.
| Identifier | ExFiles\Box 157\1\ scan0150 | |
| Date | 22th November 1934 | |
| +4050 22.11.34. Comparison of Steering Wheel Effort with Standard Dunlop Fort Tyres & Dunlop Fort 90 Tyres on 25 HP. We have measured the effort required to turn the steering wheel of a 25 HP. chassis with the car stationary on dry concrete when fitted with (1) Standard Dunlop Fort Tyres and (2) Dunlop Fort 90 Tyres. The conditions were as follows :- (1) Standard 25 HP. Chassis. (2) Car stationary on dry concrete. (3) Effort measured with wheels in straight ahead position. (4) Tyre pressure 35 lbs/sq.in. in both cases. (5) Size of tyres 6 x 19 in both cases. (6) Both sets of tyres approximately new. The results were as follows :- Standard Dunlop Tyres. Effort at Wheel = 48-51 lbs. at 7.50" = 360-380 lbs.ins. Dunlop 90 Tyres. Effort at Wheel = 47-50 lbs. at 7.50" = 350-370 lbs.ins. From the above there is no difference in the steering effort with the two types of tyre. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||