Aeroplanes

Aeroplanes

by J. S. Zerbe

Scanned by Charles Keller with OmniPage Professional OCR software

AEROPLANES

This work is not intended to set forth the exploits of aviators
nor to give a history of the Art. It is a book of instructions
intended to point out the theories of flying, as given by the
pioneers, the practical application of power to the various
flying structures; how they are built, the different methods of
controlling them; the advantages and disadvantages of the types
now in use; and suggestions as to the directions in which
improvements are required.

It distinctly points out wherein mechanical flight differs
from bird flight, and what are the relations of shape, form, size
and weight. It treats of kites, gliders and model aeroplanes,
and has an Interesting chapter on the aeroplane and its uses In
the great war. All the illustrations have been specially prepared
for the work.

Every Boy’s Mechanical Library

AEROPLANES

BY

J. S. ZERBE, M. E.

Author of Automobiles—Motors

COPYRIGHT, 1915, BY

CUPPLES & LEON COMPANY

NY

CONTENTS

INTRODUCTORY
CHAPTER I. THEORIES AND FACTS ABOUT FLYING

The “Science” of Aviation. Machine Types. Shape

or Form not Essential. A Stone as a Flying Machine.

Power the Great Element. Gravity as Power. Mass

and Element in Flying. Momentum a Factor. Resistance.

How Resistance Affects Shape. Mass and Resistance.

The Early Tendency to Eliminate Momentum.

Light Machines Unstable. The Application of

Power. The Supporting Surfaces. Area not the Essential

Thing. The Law of Gravity. Gravity. Indestructibility

of Gravitation. Distance Reduces Gravitational

Pull. How Motion Antagonizes Gravity. A

Tangent. Tangential Motion Represents Centrifugal

Pull. Equalizing the Two Motions. Lift and Drift.

Normal Pressure. Head Resistance. Measuring Lift

and Drift. Pressure at Different Angles. Difference

Between Lift and Drift in Motion. Tables of Lift and

Drift. Why Tables of Lift and Drift are Wrong.

Langley’s Law. Moving Planes vs. Winds. Momentum

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