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Aviation History
1959
1959 - 1265.PDF
Flight, 1 May 1959 The Superiority of E.A.T.O.35 a few pints of this Oil put payloads up by tons .. ESSO AVIATION TURBO OIL 35 —the pioneer among synthetic engine oils, was introduced nearly 10 years ago. It has enabled engine builders and aircraft constructors to develop their projected designs. It is still essential to the full and unrestricted operation of British turboprop and turbojet-engined aircraft. DESIGN FREEDOM: E.A.T.O. 35 has given engine builders freedom of design, enabled them to produce com- pact engines of low weight, developing such power at tem- peratures and stresses that — prior to its availability — would have been unthinkable. PERFORMANCE: E.A.T.O.35 is the only lubri- cant that fulfils every require- ment in all British turboprop and turbojet engines under all operational conditions in all British aircraft. Essential pro- perties are maintained through- out its life, and E.A.T.O.35 is fully capable of withstanding maximum design temperatures. ECONOMY: E.A.T.O.35 has the lowest operational cost of all engine oils in airline use. It has solved the problems attending the storage of several oil grades, and has eliminated many other organisational problems in airline operation. It has extraordinary life in civil operation because it suffers little degradation in normal use. The repeated reclamation by filtering of used E.A.T.O.35 — carried out by approved specialist firms — still further increases the economy of its employment. AVAILABILITY: Stocks of E.A.T.O.35 are maintained at all the major airports used by operators of turbine-engined aircraft. This oil has been a consistent earner of foreign currency for Great Britain over a number of years, and it has been a factor in the sale of British aero engines oversea. pre-eminent in lubrication The Superiority of E.A.T.O.35 Progress is a serious game of leapfrog. Competition is the urge in a Free World. For maximum economy of operation, aircraft must fly higher and fly faster. The first leap away from traditional means of flying higher and faster was the development of the gas turbine. To produce even more power from a given weight of engine, designers, engineers, metallurgists, aerodynamicists and fuel combustion technologists acted in concert. E.E.L.3 led the breakaway Higher power, higher stresses, and wider tempera- ture extremes imposed their conflicting demands on engine lubricants. Esso European Laboratories led the breakaway from the traditional mineral oils. The first synthetic lubricant for aviation gas turbines was E.E.L.3 — familiarly known as "Eeloil" in a world where familiarity is bred from respect. World aviation respected E.E.L.3 when it was introduced in 1947, and all aircraft with British turbine engines throughout the Free World are now operated almost exclusively on its successor: Esso Aviation Turbo Oil 35. No other oil has comparable performance E.A.T.O.35 has kept its pre-eminence for over 10 years, as the only oil that complies with every conflicting demand of aircraft operation, including sub-zero starting on polar airfields and resistance to high temperatures conducted back to turbine bearings. E.A.T.O.35 has been, and still remains, the only lubricant that reconciles low viscosity, good pumpa- bility and lubrication at temperatures down to -40°, with low volatility and adequate lubrication at temperatures exceeding 250°C. No other oil has comparable performance. E.A.T.O.35 is unique among lubricants employed in aero engines because consumption is negligible, and the used oil suffers little degradation: hence it is reclaimable by simple filtration. Under these circumstances, aircraft designers and constructors have been safely able to allow for the minimum lubricant weight penalty and minimum replenish- ment cost. For example: 7s. 6d. is the average oil cost per 1,000 miles of operating a de Havilland Comet 4. Each of its Rolls-Royce Avon engines contains a mere 11 pints in the oil system. Famous aircraft Esso offer grateful thanks to all concerned in the aircraft industry. Without their willing co-operation, the development of this superior oil would have been impossible. A four-colour plate showing world-famous aircraft that operate on E.A.T.O.35 is presented on the inside pages of this folded insert as an acknowledgment of collaboration with the industry and of joint progress. Esso are proud to have drawn freely from a common fund of goodwill which has promoted the advancement of aeronautical science. Flight in the 21st century is already the concern off Esso technologists Esso Petroleum Company Limited. 36 Queen Anne"s Gate, London S.W.I Aviation Technical Service, Telephone: RELiance 1261
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