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).
Road spring and suspension load data for a Humber Super Snipe.
| Identifier | ExFiles\Box 126\2\ scan0110 | |
| Date | 3rd April 1939 | |
| 1069 and 1305 To Da.{Bernard Day - Chassis Design} from RM{William Robotham - Chief Engineer}/FWK. c. to Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} c. to Da{Bernard Day - Chassis Design}/DB.{Donald Bastow - Suspensions} Rm{William Robotham - Chief Engineer}/FWK.1/JH.3.4.39. Humber Super Snipe. Below are the road spring data obtained from the above car :- Front Suspension. Transverse leaf spring. independent. Rear Suspension. Semi eliptic, leather gaiters, shot gun lubrication. Load on each wheel. + driver. + 4 passengers. O.S.F. 909 lb. 942 lb. N.S.F. 854 lb. 905 lb. O.S.R. 908 lb. 1061 lb. N.S.R. 938 lb. 1135 lb. ................ Unsprung wt/front wheel = 110 lb. (Approx). Unsprung wt/rear wheel = 180 lb. (Approx). Loads on each spring. + driver. + 4 passengers. O.S.F. 799 lb. 832 lb. N.S.F. 744 lb. 795 lb. O.S.R. 728 lb. 881 lb. N.S.R. 758 lb. 955 lb. | ||