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).
Steering effort tests comparing a 40/50 model, an R.R. model, and a Delage car.
| Identifier | ExFiles\Box 38\1\ Scan114 | |
| Date | 13th January 1923 guessed | |
| contd:- -3- We fixed on to the steering wheel of each car a pulley (12.5" radius) around which we passed a wire and hung on weights. The 40/50 with the ball thrust took 4.5 ozs., the Delage 14 ozs. The 40/50 with the plain thrust, about 15 ozs. We also measured the effort required to turn the front wheels. We did this by disconnecting the side steering rod from the arm on the pivot and fixing to this arm a wire rope passing over a pulley on to which we hung weights. We then pushed the car along a smooth concrete floor. We added weights sufficient to slightly deflect the steering and also to give full lock. We found that with the same tyre pressures and the same backward lean, there was very little difference between the R.R. and the Delage cars, but owing to the Delage having more backward lean than us, actually, it took more power to turn the wheel. The R.R. with 60 lbs. tyre pressure .25" lean, no friction on pivots, it took 165 lbs. to deflect the steering and 622 lbs. to obtain full lock. The Delage with 60 lbs. tyre pressure .500" lean, it took 162 lbs. to deflect the steering and 1000 lbs. to obtain full lock. Hs.{Lord Ernest Hives - Chair} | ||