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 Luvax Limited discussing the properties and resistance of rubber when in contact with different oils.
| Identifier | ExFiles\Box 152\1\ scan0069 | |
| Date | 11th January 1933 | |
| -2- Messrs. Rolls Royce Ltd. 11th January 1933. "resisting" it, they are absorbing the oil and increasing in volume. As you know, the definition of "resistance" as adopted by the Air Ministry in Specification 2.F.7. is an increase of weight. Where we use rubber in contact with oil, such as gaskets and shock absorber faces, we find that again it resists the oil for an indefinite period, provided the rubber is not allowed to swell, and that it only comes in contact with vegetable oil. No rubber that we have yet found has any appreciable resistance to mineral oil, that is to say, it increases in volume and then disintegrates after about 100 hours immersion in mineral oil at 65°F. {Mr Friese} Yours faithfully, FOR LUVAX LIMITED, H.W. Pitt. Enclosure:- Gland Ring. | ||