https://www.gutenberg.org/files/63077/6 ... 3077-h.htmExcellent historical resource.
Morgan
=====HOW TO BUILD A 20-FOOT
BI-PLANE GLIDER
A Practical Handbook on the Construction of a Bi-plane
Gliding Machine, Enabling an Intelligent Reader
to Make His First Step in the Field of Aviation;
With a Comprehensive
Understanding of the Principles Involved.
BY
ALFRED POWELL MORGAN
Editor Mechanical and Electrical Department of the
“Boy's Magazine.”
NEW EDITION, REVISED
NEW YORK
SPON & CHAMBERLAIN, 123 LIBERTY ST.
LONDON
E. & F. N. SPON, LIMITED, 57 HAYMARKET, S.W.
1912