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).
Report comparing a Lockhead brake system to a mechanical system, noting leakage, weight, and efficiency.
| Identifier | ExFiles\Box 120\3\ scan0023 | |
| Date | 11th August 1932 guessed | |
| -2- the highest temperatures were recorded. There was considerably less trouble from leakage of brake fluid at the shoes than there was of oil from the hub. They found that the Lockhead saved weight, had a higher initial efficiency than the mechanical system and maintained this efficiency well. HS{Lord Ernest Hives - Chair}/Ba. | ||