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).
Instruction sheet detailing tests on condensers using various paraffin wax impregnations.
| Identifier | ExFiles\Box 52\3\ Scan183 | |
| Date | 29th June 1920 | |
| RR 238 (100 BKS.) (BH57-29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. PC 74 (2) Customer's No. paraffin wax Nº 1609. Standard condenser, first impregnated with a mixture of commercial wax and resin, and then baked. Group 2. Nº 1335. Made up with untreated white paper, and impregnated with commercial paraffin wax. Nº 1577. As 1335, but impregnated with pure wax of melting point 112°F. {Mr Friese} Nº 1600. As 1577, but with wax of melting point 125°F. {Mr Friese} The main point is elicited from the results of these tests — that paraffin wax had the opposite effect on the capacity of a condenser when heated, to varnish, though to a much lesser degree. i.e. instead of an increase in capacity with rise in temperature, there is a slight decrease. Signed Cont'd. {John DeLooze - Company Secretary} This Sheet must be filed on completion of the work | ||