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).
Issues with the Dubonnet suspension system compared to a wishbone type, based on experiences with Chevrolet.
| Identifier | ExFiles\Box 173\4\ img045 | |
| Date | 17th November 1938 | |
| Pages 2 of 3 in Tracing Office To Hs{Lord Ernest Hives - Chair} Sy WoV E By Hdy{William Hardy} USA BOOK Cadillac 17-11-38 We got here on Friday afternoon and had dinner with Oy. Arranged a visit GM on Monday. Oy has been working for 12 months on Dubonnet suspension on the Chevrolet. He prefers the wishbone type, condemning the last two years' work, and gives as reasons (1) The Dubonnet is not sufficiently rigid & bends on corners causing oversteering which is very difficult to correct. Deflection also gives a rise & fall also in panel. (2) ' only by chance is a D) suspension free from road shocks (3) Wishbone is cheaper to manufacture (4) Dubonnet requires more accurate manufacture (5) Dubonnet frequently causes low speed wobbles. These be eliminated by tuning the engine mounting | ||