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).
Comparison of end thrusts in yoke bushings for the B.III and Packard models, including diagrams and calculations.
| Identifier | ExFiles\Box 127\1\ scan0345 | |
| Date | 23th February 1938 | |
| 1086 23rd. February 1938. COMPARISON OF END THRUSTS IN YOKE BUSHINGS ON B.III AND PACKARD. The distance "a b" is 10.3" on the Packard and 10.0" on the B.III. The distance "c" is 6.425" on the Packard and 5.6" on the B.III. Spring rating. Packard 80 lb/inch at wheel. B.III 145 lb/inch at wheel. Angle of axis of pivot of upper triangle to ℄ of frame Packard 24° B.III 22½° For a movement of 1 inch. Packard. Moments abt. b 80 x 6.425 = end thrust in top lever x 10.3 ∴ Additional end thrust = 49.9 lb. ∴ Horizontal component along bushing = 49.9 Cos 66 lb. = 20.4 lb. cont'd.{John DeLooze - Company Secretary} | ||