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).
Advising the adoption of coil springs over leaf springs in future suspension designs.
| Identifier | ExFiles\Box 154a\4\ scan0121 | |
| Date | 3rd July 1939 | |
| 1306 To Da {Bernard Day - Chassis Design} /Ev. {Ivan Evernden - coachwork} from Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} c. Da {Bernard Day - Chassis Design} /DB. {Donald Bastow - Suspensions} c. Les. {Ivan A. Leslie} Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} 15/MH. {M. Huckerby} 3.7.39. COIL SPRINGS - SUSPENSION. Owing to the vastly superior life of coil over leaf springs the Americans are adopting "black bar" springs and reducing the stress by 10%, thus saving cost. It would be advisable in future designs to leave room for such springs. Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} | ||