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).
Coil spring and material stress for the Myth front suspension.
| Identifier | ExFiles\Box 110\3\ scan0022 | |
| Date | 6th December 1940 | |
| In. Re. Susem Ev{Ivan Evernden - coachwork}/DB.{Donald Bastow - Suspensions} C. to Ev.{Ivan Evernden - coachwork} & Rm{William Robotham - Chief Engineer}/IH. 1030 Ev{Ivan Evernden - coachwork}/DB.{Donald Bastow - Suspensions}S/27.6.12.40. 746 FRONT SUSPENSION MYTH. FL.428, attached to this memo, shows the coil spring for the Myth front suspension, suitable for a sponge load of 600 lbs. at the wheel and having a rating corresponding to a static deflection of 5.5", assuming that the various bushes in the suspension linkage have a rating of 23 lb/in, at the wheel. The low maximum stress, i.e. 96,000 lbs/in2 approx., corrected, implies that the material can be inferior to that used on the B.V springs. It also implies that the weight of the spring is on the high side and a later scheme will show a higher stressed spring which can be used if weight reduction is desired. Ev{Ivan Evernden - coachwork}/DB.{Donald Bastow - Suspensions} Original of FL.428 to Rm{William Robotham - Chief Engineer}/IH. Prints to Rm{William Robotham - Chief Engineer}/IH., Ev.{Ivan Evernden - coachwork} & Ashby. | ||