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).
Vehicle wobble intensity tests comparing different tyres and dampers.
Identifier | ExFiles\Box 17\3\ Scan029 | |
Date | 16th August 1926 guessed | |
GENERAL CONDITIONS. Standard S.S.Tube, 3500 S.S.Springs, solid cross steering tube; parallel wheels, shock dampers 75 & 35Lbs, tyres, pressure 35 LbsSq.I. Wheels balanced. Any deviation from this in test specified. A.{Mr Adams}-COMPARISON of TYRES. Wobble Intensity. (I). Dunlop 33x6"Triple stud Well worn. Period 65-58 M.P.H. Spasmodic only. Does not build up (II). Same as (I). Tyres perfectly new. (III). Michelin 33x6.75"Tyres. New tread. Wobble period 67-62 M.P.H. (IV). Standard S.S. CORD tyres at 45 Lbs/Sq.I. No wobble. B.-COMPARISON of DAMPERS. Dunlop 33x6" Triple stud well worn tyres at 35 Lbs per Sq.I. (I). No Dampers. (XY) (II). Standard dampers. 75&35 Lbs. (III). Dampers 150 Lbs and 35 Lbs. (XY). This represents a genuine continuous high speed wobble that builds up. | ||