Science: Compound Endurance

The Wright Aeronautical Corp. described this week its "Turbo-Cyclone 18 Compound Engine," designed for the utmost fuel economy. It has a conventional piston engine in front and three small turbines driven by the exhaust gases. The turbines add 20% more power, but use no extra fuel.

When operating in the Navy's Lockheed P2V-4 Neptune, the "18s" should enable the long-range patrol bomber to fly around the world at the 55th parallel (latitude of Belfast and Omsk) without refueling.

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