In the rarefied air of great heights, engine power and plane speed drop rapidly, yet the most effective fighting must be done at altitudes of 15,000 feet. Lifting somewhat the veil of mystery which shrouds its work, the British Royal Air Force gives news of tiny monoplanes, no bigger than a Mummert flivver, equipped with 320 horsepower and capable of 150 miles an hour with full military equipment at the greatest heights.
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