Many a hapless pilot has crashed, died in flames ; many a plane burst afire in midair. Elmer Ambrose Sperry, famed inventor, of Brooklyn, N. Y., believes the fire menace mastered. His company has developed a Diesel airplane engine. Fuel oil for Diesel engines is non-inflammable.

Refinements on the familiar, far too heavy Diesel engine are reported by Mr. Sperry after years of research. The new motor weighs close to the lightest gasoline engine; is capable of delivering speed and horsepower comparable to good racing motors of the normal type. Experts read the...

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