Radio Control Soaring by Dave Hughes Good condition. 268 pages.
This is a brilliant manual form the early seventies on the subject.
Covers more or less everything in huge and exhaustive detail with a
profusion of photos,diagrams and line drawings.

A few headings from the many chapters:- Mechanics of slope soaring /
Rudder only soaring / The pylon race soarer Creative soarer design /
Introduction to thermal soaring / Aero towing / Aerofoil sections etc.

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