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).
The road spring characteristics and weights of experimental cars, including the 1.B.30 and Buick Century.
| Identifier | ExFiles\Box 154a\4\ scan0094 | |
| Date | 1st March 1939 | |
| 1306 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.5/JH.1.3.39. ROAD SPRING DETAILS OF EXPERIMENTAL CARS. Below are the Road spring Characteristic and weights of the following cars as requested, 1.B.30., 2.B.30., 8.B.V., Buick Century. ............... 1.B.30. Front springs - English Steel Open coil. Rear springs - Toledo Woodhead with interleaving. Load on each Wheel. + driver. + 4 passengers. N.S.F. 971 lb. 1049 lb. O.S.F. 1110 lb. 1188 lb. N.S.R. 1106 lb. 1316 lb. O.S.R. 1153 lb. 1363 lb. Unsprung wt/front wheel 140 lb. Unsprung wt/rear wheel 215 lb. Load on springs (Measured at wheel). + driver. + 4 passengers. N.S.F. 830 lb. 909 lb. O.S.F. 970 lb. 1048 lb. N.S.R. 891 lb. 1101 lb. O.S.R. 938 lb. 1148 lb. | ||