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).
Shock damper settings and their effects on vehicle handling with Michelin 6.2' tyres.
Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan190 | |
Date | 1st September 1926 guessed | |
contd :- -5- V.{VIENNA} SHOCK DAMPER SETTING. Condition of car. Michelin 6.2" tyres. (a) Front. 35 lbs. up - 100 down. Prevents any wobble building up but shocks transmitted to the wheel at critical speed with the worst tyres. Front of car riding rather harsh owing to excessive rebound loading. 55 lbs. up - 100 down. Slightly more effective anti-wobbler, but car riding at the front definitely harsh. 40 lbs. up - 80 down. Regarded as the best compromise Still a very effective anti-wobbler, and car sufficiently damped, but harsh riding at low speeds removed. (b) Rear. 18 lbs. up - 100 down. Back of car does not hold the road well on a bad surface, causing steering to wander. Object-ionable kick in the small of the back in the front seats. 20 lbs. up - 100 down. Road holding vastly improved, but kick in the back still present. 60 lbs. up - 80 down. Best all round results for high speeds on Continental roads. Upward setting probably rather too great for British conditions. General road holding rather with 6.2" or 6.75" tyres very good. Steering selectiveness with 1500 lbs. side steering tube springs, quite satisfactory as long as rear tyre pressures are kept up. contd :- | ||