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 calculations for material deflexion, comparing Packard and Bentley III models.
| Identifier | ExFiles\Box 100\1\ scan0158 | |
| Date | 27th May 1938 | |
| -5- Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}6/MH.{M. Huckerby}27.5.38. EIy_B = -133 (10 - a)^3 = -133 (1000 - 300a + 30a^2 - a^3) = -133,000 + 40,000a - 4,000a^2 + 133a^3 y_B = 1/E.I. (-133,000 + 40,000a - 4,000a^2 + 133a^3) Total Deflexion = 1/E.I. (-133,000 + 145,000a - 12,250a^2 + 167a^3) 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 D^4) / 64 D varies between 1.25 and 1.50 Take D = 1.35 I = (π x 3.32) / 64 = .163 E = 30 x 10^6 a = 7.15 Total y_B = (-133,000 + 1,035,000 - 625,000 + 61,000) / (.163 x 30 x 10^6) = 338,000 / (4.9 x 10^6) = .069" Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||