A detailed examination of the nature and function of general aviation and a discussion of how the National Aeronautics and Space Administration (NASA) helps keep it on the cutting edge of technology are offered in this publication. The intricacies of aerodynamics, energy, and safety as well as the achievements in aeronautical experimentation are presented. Topic areas include: (1) what is general aviation; (2) aerodynamic efficiency; (3) internal combustion engines; (4) turbine engines; (5) commuter aviation; (6) general aviation utility; (7) safety improvements; (8) electronics and avionics; and (9) the future of general aviation. The field of general aviation is upheld as a dynamic and vital national asset to the United States economy and leadership potential. (ML)