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).
Engine cooling system issues including corrosion, cost analysis, and a test plant.
| Identifier | ExFiles\Box 150\2\ scan0294 | |
| Date | 15th January 1940 | |
| - 3 - Continued:- 2. Corrosion inhibitors should be used with caution or the tendency may be to exaggerate the trouble if the water used in the cooling system is already at fault. 3. Air leaks of all form and description must be avoided. 4. Local boiling causing desposits of carbonates must not be allowed. 5. Electrolytic action between dissimilar metals is aggravated by an acid tendency in the coolant. Arranged in electrolytic order are copper, brass, lead, tin, iron, solder, zinc and aluminium. The further the metals are apart in this list, the greater the electrolytic action and it will be observed that copper and aluminium form very active couples, as so also iron and aluminium. 6. Special emphasis is laid on a necessity for regular routine cleaning of cooling systems. 7. Rust preventives or inhibitors are recommended. These in most cases deposit a light film of soluble mineral oil covering the metal walls and avoiding direct contact between coolant and metal. IV. COST ANALYSES. For the purpose of obtaining comparative cost figures with the fin and tube radiators Marstons were requested to supply a cost analyses of the Bentley V radiator unit. It was promised that these figures will be obtained shortly. V. {VIENNA} JOHN MARSTON'S TEST PLANT. Experimental test plant rigged up for the purpose of testing oil coolers and matrix blocks has been completed and was inspected. The attached memo giving description of the plant during its first test supplies most of the essential information. General impressions were that the plant would be very accurate and results can probably be relied upon. Rm {William Robotham - Chief Engineer} /Ed. {J. L. Edwards} 4 | ||