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 die-cast and sand-cast wheels, measuring rim deflection under increasing loads.
| Identifier | ExFiles\Box 3\1\ 01-page009 | |
| Date | 23th December 1912 | |
| Die cast. lbs. Deflection on the rim. Remarks. 250 .05" 500 .13" 750 .31" 1000 - Broke before the whole of the weight was on. Sand cast. lbs. Deflection on the rim. Remarks. 250 .03" 500 .15" 750 .30" 1000 .59" 1250 - Broke before the whole of the weight was on. Wheels herewith, each deflection is marked on the rim. [Faded text near sketch] Levergised 2 times load of wheel 100 lbs added, [illegible] at a time [Text next to sketch] RAH 23/12/12 I set length for load mentioned above weight presumably (loads mentioned above) | ||