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).
Laboratory analysis of the material composition of a broken steering wheel.
| Identifier | ExFiles\Box 154\3\ scan0136 | |
| Date | 11th July 1922 guessed | |
| Hs.{Lord Ernest Hives - Chair} X4557 H13/EF17722 Laboratory Re Broken Steering Wheel. Analysis:- Copper----------2.52% Zinc------------7.30% Iron------------0.75% Manganese-------Trace Magnesium-------0.06% A sand cast would naturally be soft when of the above composition HC H1. | ||