A DOUBLE BOOK - TWO FULL BOOKS IN ONE:
BOOK 1
Propellers: The First, and Final Explanation - isbn 9780962023927
The most complex subject in aerodynamics reduced to understandable insight.
The professional, incisive, understandable logic of propellers. The explanation that has so very long been so badly needed by aeronautical engineers, propeller designers, and pilots - the users. That should have been available at least half a century ago. The longest, most fundamental hole in aerodynamics.
BOOK 2
The Logic of Flight: The Thinking Man's Way to Fly - isbn 9780962023910
Intelligent, efficient flight featuring max speed / $.