Book excerpt: Once a plane is built it must be flight tested and pass to be certified for legal flight. This book tells you how to conduct performance flight tests, how to collect the data and how to crunch it using MS Excel, and how to read the results. It includes lightplane performance testing methods, measures and computer applications for pilots, students, engineers and builders. The CD contains example spreadsheets containing equations that readers can use to reduce their own data and manipulate for corrections.