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).
Letter from Vauxhall Motors discussing the properties of oil for hypoid gears.
| Identifier | ExFiles\Box 127\4\ scan0075 | |
| Date | 1st September 1937 guessed | |
| 3. All others examined have given figures well below this, some going down to 6000 lbs. The oil produced in this country contains no corrosive substances in a free state but in order to produce good results with hypoid gears the American EP{G. Eric Platford - Chief Quality Engineer} oils have traces of free Sulphur. When these oils are used, no phosphor bronze should contact with them. Yours faithfully, for VAUXHALL MOTORS LIMITED. K.S. WISE. Asst. Passenger Chassis Engineer. | ||