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).
Request to design softer front springs with associated weight and load calculations for models W.80 and B.80.
| Identifier | ExFiles\Box 154a\4\ scan0116 | |
| Date | 10th June 1939 | |
| 1306 JOHH 666 To Da {Bernard Day - Chassis Design} /DB. {Donald Bastow - Suspensions} from Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} c. By {R.W. Bailey - Chief Engineer} /HEB. {H. Biraben} Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} 1/MH. {M. Huckerby} 10.6.39. SOFTER FRONT SPRINGS - W.80 & B.80. Will you please design springs of 8 1/2" effective deflection for W.80 and B.80, when laden. 30.G.VII (W.80) has the following weights etc:- N.S.F. | O.S.F. Weight on front wheel light: 1064 lbs. | 1149 lbs. Weight on front wheel laden: 1149 lbs. | 1215 lbs. Loads on springs (at wheel) light: 934 lbs. | 1019 lbs. Loads on springs (at wheel) laden: 1019 lbs. | 1085 lbs. Rate per inch, lbs.: 132 | 140 Static Deflection, light: 7.07" | 7.28" Static Deflection, laden: 7.72 | 7.75 Bounce Frequency, light: 70.5 v {VIENNA} /min. Equivalent static deflection: 7.1" 11.B.V. (B.80) has the following weights etc:- N.S.F. | O.S.F. Weight on front wheels, light: 972 | 1106 Weight on front wheels, laden: 1042 | 1138 Loads on springs (at wheel), light: 842 | 976 Loads on springs (at wheel), laden: 912 | 1008 | ||