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).
Vehicle testing procedures for chassis, steering components, and hydraulic shock dampers.
| Identifier | ExFiles\Box 148\5\ scan0013 | |
| Date | 21th June 1926 guessed | |
| contd :- -2- Therefore it is frequently desirable to adhere to the same type of body on different chassis during a test, to reduce the varia-bles, thus making sure what mean change has, irrespective of the added complication of different types of body, been produced in the car. The general characteristics of every type of body are well known to the Experimental Dept. It is only be using past experience that tests can be reduced to manageable propor-tions. Open and closed cars (9-PK and 98-NK) were compared with weak side steering tube springs over two years ago. Where such a consideration as the position of the centre of gravity is likely to have a material influence on the result, it is of course best to try two types of car in which this feature varies as widely as possible. (b) With reference to (b). Adding weight to the rear of the car improved its steering at high speeds. Our object was to observe the behaviour of the new steering and side steering tube springs under the worst circumstances for control likely to be encountered by a customer. We therefore consider that as the tests proved satisfactory under these extreme conditions, no useful purpose would be served by improving these conditions and trying a car with more weight on the back. Naturally high speeds are not the only means of testing a steering, but almost every other type of test can be carried out easily and conveniently in proximity to the Works. (c) With reference to C.(1). We have carried out enormous numbers of tests during the developement of the hydraulic shock dampers which have shewn us that :- | ||