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).
Page of engineering calculations for determining material stress.
| Identifier | ExFiles\Box 52\1\ Scan186 | |
| Date | 31th January 1929 guessed | |
| -2- Contd. We now have d = .056" D = .320 W = 11.00 lbw. L = 5.540 inches δ = 1.750" R = W/δ = 7.14 lbw/inch We have also n = (12 x 10^6 x (.056)^4) / (8 x (.320)^3 x 7.14) = 63.1 say 63 (n+1) d = 64 x .056 = 3.580" Stress f = (12 x 10^6 x .056 x 1.750) / (π x (.320)^2 x 63) = 58,000. | ||