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).
Report discussing the selection of springs, semi-balloon tyres, and shock damper oil based on performance requirements and trial results.
| Identifier | ExFiles\Box 148\5\ scan0015 | |
| Date | 4th June 1926 guessed | |
| contd :- -4- the springs likely to be the best for all round purposes. (d) With reference to (d). We agree that it would be unwise to adopt semi-balloon tyres until we have had more experience with them. The next 10,000 miles trial car should give us the information we require. Tests on bodied cars with these tyres would certainly be of value. We should not issue a standardisation sheet until these tests are made. (e) With reference to (e). We are tied down as to the oil which we can use in the shock dampers owing to the fact that the oil must remain fluid in the coldest weather, otherwise in cold weather the car would ride like a truck. Again we are limited as to the springs that we can use in the dampers if low speed riding comfort is to be maintained. Tests in France to select these two items would be quite valueless because the best results under Continental conditions would almost certainly give impossible riding for Sales trials round London in the Winter. Our final selection for the arrangement of these dampers is dictated by the requirements of :- (a) High speed wobbles. (b) Low speed riding comfort. (c) Low temperature conditions. (d) Oil retaining requirements. (f) With reference to (f). As will be gathered from previous remarks, the degree of immunity from high speed wobbles is dictated by the low speed riding comfort required. With reference to the request XXX for hydraulic shock dampers and standard friction dampers. This request came from CWB. We only quoted this as an instance of a Sales contd :- | ||