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).
Letter responding to a query about the general arrangement of hydraulic shock absorbers.
| Identifier | ExFiles\Box 151\2\ scan0276 | |
| Date | 29th August 1934 | |
| 1469 Exptl. Dept. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 14/KW. 29th August, 1934. G. {Mr Griffiths - Chief Accountant / Mr Gnapp} MacLeod Ross, Esq., Superintendent of Design, Royal Arsenal, Woolwich, S.E.18. Dear Sir, With reference to the query contained in your letter of the 20th August, attached is our Drawing F.85732 which indicates the general arrangement of one of our Hydraulic Shock Absorbers. It will be observed that these shock absorbers run with a maximum ball pin load of 300 lbs. at 12 1/2" radius. The ball pin load on the damper is varied by oil pressure introduced into a sylphon tube, which in turn increases the load upon the spring loaded shock absorber valve. The oil pressure is varied by a pump which is driven off the car transmission. A governor is used to automatically vary the oil pressure with the speed of the car, and in addition there is an over-riding hand control which can increase the maximum load on the system. All connections are spring loaded to avoid rattles due to wear. Details of the system are contained in the attached prints. We shall be glad to know if you require any further information. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||