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A PRACTICAL COURSE OF INSTRUCTION IN THE PRINCIPLES, OVERHAULING, AND CARE OF AIRPLANE MOTORS.

By GEO. E. A. HALLETT, A. M. E., Signal Corps, Aviation School, San Diego, Cal.

INTRODUCTION.

Object of this Course.-In the case of student flyers, it is to give them a practical knowledge of airplane motors sufficient to enable them to diagnose motor trouble when on cross-country flights and to make rapid and practical repairs if possible, or, in any event, to be able to send an intelligent message for parts, etc., and to explain to mechanicians nature of trouble and its remedy.

In the case of the mechanician, the object will be to make an airplane motor man out of an automobile mechanic or machinist. Parts of it should be useful to give to automobile factories to help them train aviation mechanicians. The course consists of: (1) A series of lectures, beginning with principles and covering a wide range of practical work as well as bench and block work. (2) A bench course, of overhauling unserviceable motors (preferably airplane motors: methods explained later). (3) Block course of installing motor on a test block or in a fuselage; placing propeller, cranking, handling switch and throttle to start motor, carburetor adjustment, "trouble-shooting," emergency repairs, inspection or "prevention of trouble." (4) If time permits, a study course in some good gas-engine book.

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