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).
The back axle, steering, chassis, and consumption tests of a car.
| Identifier | ExFiles\Box 180\M2\M2.4\ img007 | |
| Date | 23th July 1920 | |
| Contd. -7- BACK AXLE. The control of the back axle on this car is all taken on the rear springs. The rear springs act as torque and radius rods. They are 1/2 elliptic type. The back axle ratio is 3.75 to 1. The diameter of the road wheels is 895 x 135. The back axle was exceptionally good for silence. The tie-rod was used on the back axle. STEERING. X-963 The steering on this car was worm and segment type. On the road it operated very nicely except that it was very heavy on full lock. The steering was self-centering. It was very good steering at high speed. It was noticeable that on all the steering levers the ball end was made solid with the lever; the lever itself was then bent at right-angles. CHASSIS. Weight of chassis - rear 12 cwt. 0 qrs. - front 15 cwt. 2 qrs. This is chassis complete with battery and head lamps which makes it 1 ton. 7 cwt. 2 qrs. The car comes out very heavy consider-ing the HP. obtained from the engine. The chassis has a rather nice appearance chiefly due to the fact that the frame is low. The top of the frame is 22" from the ground. The minimum ground clearance at the undershield end of the flywheel is 7.750". Consumption tests on the road. 16.3 M.P.G. at 20 M.P.H. 18 M.P.G. at 40 M.P.H. Contd. | ||