Photographic comparison of standard and stiffened Phantom III rear axle shafts after joggling rig tests.
| Identifier | ExFiles\Box 92\5\ scan0116 | |
| Date | 20th April 1937 guessed | |
| STANDARD SHAFT AFTER 47 MINS. AT 450 R.P.M. TYPICAL FRACTURE SHOWING RADIAL CRACKS FROM ROOTS OF SPLINES. STIFFENED SHAFT N.SCH.4938 AFTER 236 MINS. AT 450 R.P.M. PHANTOM III REAR AXLE SHAFTS. JOGGLING RIG TESTS. | ||
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).