S. Howard Gregory and I have our 914 Le Rhone rotary powered Lincoln leachey pusher biplane completely re- tored and flying. ... at the agt;ame time would likely increase form Jrag because of less favorable body lines unless boundary layer control was introduced. ... Other Publications include aquot;American Flight Navigatoraquot;, (Dohm) $6.50: aquot;Rules of the Airaquot;. ... Largest stock, in the U. S., of New, Used and Overhauled engines, propellers, accessories and airframe parts. Free list by makes.