The S & C Series
No. 39

NATURAL STABILITY IN AEROPLANES
W. LeMAITRE
1s 6d Net
NATURAL STABILITY
NATURAL STABILITY
AND
THE PARACHUTE PRINCIPLE
IN AEROPLANES
BY
W. LeMAITRE
Hon. Sec., Aeroplanes Building and Flying Safety
WITH 34 ILLUSTRATIONS
LONDON
E. & F. N. SPON, Ltd., 57 HAYMARKET
New York
SPON & CHAMBERLAIN, 123 LIBERTY STREET
1911
CONTENTS
  PAGE
 Frontispieceiv
 Prefaceix
CHAPTER
I.The Importance of Stability11
II.Speed as a Means of Stability14
III.The Low Centre of Gravity17
IV.Short Span and Area28
V.Variable Speed and the Parachute Principle36
VI.The Design which Fulfils the Conditions39
PREFACE
Since there is nothing new under the sun, it is useless to pretendthat there is anything new in the design here advocated or thetheories advanced. Both are rather the result of a commonsenseconsideration of the different points of all flying machines, naturaland artificial, and an endeavour to select from the great number ofgood points those which seem most likely to blend together into apractical machine. The conclusions reached are the result of a quiteindependent investigation, carried on over three years by means ofnumberless experiments, and the writer has endeavoured to make nosingle statement which he cannot by some experiment amply prove.
[Pg 11]
NATURAL STABILITY IN AEROPLANES
CHAPTER I.
THE IMPORTANCE OF STABILITY.
In considering                        
...
                        
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