 His 1,647 km (1,023 mi) out-and-return flight in 1983 was the world's longest glider flight at the time, stood as a world record for nearly 20 years, and is still a U.S. national record.He has set more than 50 other U.S. National soaring records.His glider flight training manuals, "Glider Basics from First Flight to Solo" and "Glider Basics from Solo to License" are the most popular in the U.S., and he is one of the most respected glider flight instructors in the world.