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 providing a quotation and recommendations for gaskets, discussing material thickness and water sealing.
| Identifier | ExFiles\Box 132\4\ scan0083 | |
| Date | 20th August 1937 | |
| ( COPY. ) CHURCH STREET CHISWICK LONDON.W.4. 20th August 1937. REF. E.1283 Messrs. Rolls-Royce Ltd., DERBY. ------- Dear Sirs, With reference to our conversation, we have pleasure in enclosing a quotation for supplying the Gaskets E.88842 with a copper washer .004" thick between the top layer of copper and the eyelet flanges. We cannot, however, recommend this as being the most efficient way of avoiding water leakage for a variety of reasons which are difficult to deal with adequately in a letter. If it is a question of obtaining a rather better water seal, we would suggest that the eyelets be left proud, as you will find from the gasket which is being sent to you on Monday. If the gaskets are made, as is normally the case, with a copper base .009" thick and a copper top .004" thick, the overall thickness before compression around the cylinder openings is .022" plus the thickness of asbestos, whereas around the waterways it is .051" plus the thickness of asbestos (thickness of the copper eyelets .009".) In practice the eyelets around the smaller holes compress rather deeper into the asbestos, therefore the difference in thickness is not so marked, but if you are desirous of creating a rather greater thickness around the waterways, then we would suggest the use of eyelets .012" Continued. | ||