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).
Note on Hartford Shock Absorbers, comparing the double type intended for racing cars with the single type.
| Identifier | ExFiles\Box 51\4\ Scan058 | |
| Date | 1st July 1922 | |
| Wa. {Mr Wallis} Paris. from Hs. {Lord Ernest Hives - Chair} Y4426 Hs {Lord Ernest Hives - Chair} 2/LG1.7.22. HARTFORD SHOCK ABSORBERS. We have received your note re. the above. The double Hartford Shock Absorber is intended for racing cars where they wish to have a tremendous amount of friction on the springs. The only advantage in them over the single type is that the pressure per unit area is less on the friction surfaces, but it does not help us very much because the joints are not increased proportionately. Hs. {Lord Ernest Hives - Chair} | ||