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).
Calculation of spring stiffness and time of complete swing for two different mass-spring system configurations.
| Identifier | ExFiles\Box 43\2\ Scan195 | |
| Date | 28th September 1937 guessed | |
| Case I DEFLECTION UNDER LOAD. SPRING STIFFNESS (RATING) = W/d TIME OF COMPLETE SWING = 2π * sqrt(disp / acc) = 2π * sqrt(x / ((W*x/d) / (W/g))) = 2π * sqrt(d/g) Case II DEFLECTION UNDER LOAD. SPRING STIFFNESS (RATING) = W / 2d TIME OF COMPLETE SWING = 2π * sqrt(disp / acc) = 2π * sqrt(x / (Wx/2d)) [struck through] = 2π * sqrt((x/2) / ((Wx/d) / (W/g))) = 2π * sqrt(d / 2g) i.e. TIME = .707 of time in Case I | ||