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).
Joggling test results for Phantom III rear axle shafts.
| Identifier | ExFiles\Box 92\5\ scan0115 | |
| Date | 19th April 1937 guessed | |
| Phantom III Rear Axle Shafts. Joggling Tests. Crank 6.00 stroke. Link 34.000 long. Arm 8.875 radius. Axle shaft. Flywheel inertia 1.1 slugs ft² Tests results. Sample: Stiff shaft No.1. Fractured after: 775 mins. at 410 cycles/min. (handwritten) 10 " at 500 " Sample: No.2 Fractured after: 955 mins. at 410 cycles/min. (handwritten) 3 " at 500 " (handwritten) " at 450 " Sample: No.3. Fractured after: 236 min. at 450 cycles/min. Sample: No.4 Fractured after: 267 min. at 450 cycles/min. Sample: Std. shaft No. 1. Fractured after: 2 mins. at 450 cycles/min. 8 mins. at 350 " " 5 mins. at 450 " " Sample: No.2 Fractured after: 47 mins. at 410 cycles/min. N.B. The torque in the stiff shaft at 450 cycles is approximately the same as in the standard shaft at 410 cycles and equals half maximum bottom gear torque. | ||