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).
Specifications and calculations for a long low rate unenamelled spring.
| Identifier | ExFiles\Box 52\1\ Scan185 | |
| Date | 31th January 1929 guessed | |
| (1) LONG LOW RATE SPRING Y (UNENAMELLED) Maximum load = 11.00 lbw Initial load = 6.00 lbw. Working compression = .700 inches. Rate = 5.00 / .700 = 7.14 lbw/inch (R) Compressed length = 4.000" (L!) Initial length = 4.700" Free length = 5.540" (L) δ = 1.540" Suppose D = .264 + .056 = .320" Then d = 5√((8 x (.320)³ x 7.14 x .4000) / (12 x 10⁶)) = 1/10 5√((8 x (.32)³ x 7.14) / 3) = 1/10 5√.0623 = .0573" Contd. | ||