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).
Test results for a sand-cast, unannealed aluminium steering wheel, showing load versus deflection data and fracture analysis.
| Identifier | ExFiles\Box 3\1\ 01-page015 | |
| Date | 31th January 1913 guessed | |
| -4- Sand cast wheel in aluminium, unanealed. | Load at rim of steering wheel | Deflection measured at circumference of rims. | |---|---| | 250 lbs. | .03" | | 500 " | .15" | | 750 " | .30" | | 1000 " | .59" | | 1250 " | fracture. | The boss of the wheel fractured immediately before the whole of the 1250 lbs load was applied. The fracture occured in the same place, i.e. in the corner of the keyway and the bolts were badly distorted and the boss deflected from the circular. The fracture was not at all short and could not really be considered christaline. The material did not appear to be in such good condition as in the die cast wheels. It should be noted that the | ||