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).
Study on the variation of steering torque based on tire type and pressure.
| Identifier | ExFiles\Box 29\1\ Scan125 | |
| Date | 10th October 1925 guessed | |
| ETUDE SUR LE 8 DAY Variation du Couple de Braquage suivant le type de pneu et la{L. A. Archer} pression (Volant de Cm.50) Voiture de | Charge | Câblé | Confort | OBSERVATIONS : Charge : AV | Dimensions : Pression : Effort | Dimensions : Pression : Effort --- _ture | | | | | Hispano | 1.032 | 895/135 | 3 | 25 K | 905/135 | 2 K | 30 K | Daim | 1.176 | 895/135 | (6 (5 | 50 45 | 905/135 | (3 (4 | 60 48 | | 1.472 | 895/135 | (6.5 (5 | 83 67 | 920/125 | (2.5 (4 | 90 68 | 27 17 | 1.435 | 895/140 | 3.5 | 45 | 905/135 | 2.5 | 45 | 27 17 | 954 | 820/120 | (6 (5 | 30 25 | 830/130 | (1.5 (3 | 35 32 | roulements lisses 27 17 | | 820/120 | (6 (5 | 28 23 | 830/130 | (1.5 (3 | 32 24 | roulements à rouleaux N.W Expl. | 1.030 | 820/120 | (6 (5 | 31 27 | 880/130 | (1.5 (3 | 37 31 | N.W 19 | 854 | | | | 820/120 | (0.750 (1.500 (3. | 42 30 23 | sans freins AV | 728 | | | | 775/145 | (0.875 (1.750 (3.500 | 40 30 24 | -1°- N.W 5 Flt | 770 | 765/105 | (1 (3 (5 | 50 35 28 | 775/145 | (0.750 (1.500 (2.500 | 54 45 30 | avec freins AV P.W 7 Open | 618 | 765/105 | (1.250 (2.500 (5. | 33 26 18 | 730/130 | (0.750 (1.500 (3. | 37 25 19 | sans freins av. | 498 | | | | 730/130 | (0.625 (1.250 (2.500 | 31 24 18 | -1°- ...... | ||