Mathematical calculations for deflection, comparing Packard and Bentley III models, and analyzing the B.III Yoke.
| Identifier | ExFiles\Box 127\1\ scan0371 | |
| Date | 27th May 1938 | |
| -5- Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} 6/WH.27.5.38. EIyB" = -133 (10 - a)³ = -133 (1000 - 300a + 30a² - a³) = -133,000 + 40,000a - 4,000a² + 133a³ yB = 1/E.I. (-133,000 + 40,000a - 4,000a² + 133a³) Total Deflexion = 1/E.I. (-133,000 + 145,000a - 12,250a² + 167a³) Comparison of Packard and Bentley III. Packard. If a = 3.62, numerator = 239,500 B.III. If a = 7.15, " = 338,000 Deflexion B.III/Packard = 141% Actual Deflexion of B.III Yoke. I = (π x D⁴) / 64 D varies between 1.25 and 1.50 Take D = 1.35 I = (π x 3.32) / 64 = .163 E = 30 x 10⁶ a = 7.15 Total yB = (-133,000 + 1,035,000 - 625,000 + 61,000) / (.163 x 30 x 10⁶) = 338,000 / (4.9 x 10⁶) = .069" Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} | ||
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).