MATHEMATICS FOR THE AVIATION TRADES by JAMES NAIDICH Chairman,
Department of Mafhe mati r. v, Manhattan High School of Aviation
Trades MrGKAW-IIILL HOOK COMPANY, INC. N JO W Y O K K AND LONDON
MATHEMATICS FOR THK AVI VTION TRADES COPYRIGHT, 19I2, BY THK BOOK
TOMPVNY, INC. PRINTED IX THE UNITED STATES OF AMERICA AIL rights
referred. Tin a book, or parts thereof, may not be reproduced in
any form without perm nation of the publishers. PREFACE This book
has been written for students in trade and technical schools who
intend to become aviation mechanics. The text has been planned to
satisfy the demand on the part of instructors and employers that
mechanics engaged in precision work have a thorough knowledge of
the funda mentals of arithmetic applied to their trade. No mechanic
can work intelligently from blueprints or use measuring tools, such
as the steel rule or micrometer, without a knowl edge of these
fundamentals. Each new topic is presented as a job, thus stressing
the practical aspect of the text. Most jobs can be covered in one
lesson. However, the interests and ability of the group will in the
last analysis determine the rate of progress. Part I is entitled A
Review of Fundamentals for the Airplane Mechanic. The author has
found through actual experience that mechanics and trade-school
students often have an inadequate knowledge of a great many of the
points covered in this part of the book. This review will serve to
consolidate the students information, to reteach what he may have
forgotten, to review what he knows, and to provide drill in order
to establish firmly the basic essentials. Fractions, decimals,
perimeter, area, angles, construc tion, and graphic representation
arecovered rapidly but systematically. For the work in this section
two tools are needed. First, a steel rule graduated in
thirty-seconds and sixty - fourths is indispensable. It is
advisable to have, in addition, an ordinary ruler graduated in
eighths and sixteenths. Second, measurement of angles makes a
protractor necessary. vi Preface Parts II, III, and IV deal with
specific aspects of the work that an aviation mechanic may
encounter. The airplane and its wing, the strength of aircraft
materials, and the math ematics associated with the aircraft engine
are treated as separate units. All the mathematical background
required for this work is covered in the first part of the book.
Part V contains 100 review examples taken from airplane shop
blueprints, aircraft-engine instruction booklets, air plane supply
catalogues, aircraft directories, and other trade literature. The
airplane and its engine are treated as a unit, and various items
learned in other parts of the text are coordinated here. Related
trade information is closely interwoven with the mathematics
involved. Throughout the text real aircraft data are used. Wherever
possible, photographs and tracings of the airplanes mentioned are
shown so that the student realizes he is dealing with subject
matter valuable not only as drill but worth remembering as trade
information in his elected vocation. This book obviously does not
present all the mathematics required by future aeronautical
engineers. All mathe matical material which could not be adequately
handled by elementary arithmetic was omitted. The author believes,
however, that the student who masters the material included in this
text will have a solid foundation of the type ofmathematics needed
by the aviation mechanic. Grateful acknowledgment is made to Elliot
V. Noska, principal of the Manhattan High School of Aviation Trades
for his encouragement and many constructive suggestions, and to the
members of the faculty for their assistance in the preparation of
this text. The author is also especially indebted to Aviation
magazine for permission to use numerous photographs of airplanes
and airplane parts throughout the text. JAMES NAIDICH. NEW YORK.
CONTENTS PAOH PREFACE v FOREWORD BY ELLIOT V...
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