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).
Analysis of material deposits on a returned steel bush and a discussion of related testing procedures.
| Identifier | ExFiles\Box 145\1\ scan0216 | |
| Date | 13th July 1937 guessed | |
| VW. 21159 No. 2. V.O.Co., Ltd., to Rolls-Royce Ltd., Derby The steel bush which was returned has been very closely examined, and we understand by verbal information from you that it had been used in one or more previous tests. This bush on analysis seemed to have a double layer of material, but these were both so thin that accurate analysis was difficult. The layer of material next to the bush seemed to be a mixture of iron oxide and some material which was like boiled oil, and which our chemists believe it to be. The upper layer was of an oily nature, containing a type of compound, such as is used in EP{G. Eric Platford - Chief Quality Engineer} lubricants, and we are led to assume that the lower layer of material is therefore probably the remains of deposit from some previous test. We assume that you are acquainted with the details of the Cornell testing machine on which the above tests were recorded, but we should be glad to write you details if desired. We would say in regard to this machine that it is the usual practice to increase the load on the specimen at a given rate up to 1,500 lbs. total, and if the Vee blocks do not seize on the test piece within one hour's running, and the wear figure does not exceed 200 notches on the loading device, the result is regarded as satisfactory. Yours faithfully, VACUUM OIL COMPANY LIMITED C. Jones Chief Engineer. OTJ/AH | ||