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Can a former Part 103 aircraft be registered as an LSA? And how is an appropriate Phase I flight-test area determined?

The author discusses the theory and effect of constant-speed propellers on piston-engine airplane performance, and compares fixed-pitch versus constant-speed props, effect on thrust HP and propulsion, the comprises involved in choosing a prop, how props perform in various conditions and phases of flight, how variable-pitch props work, and why a constant-speed prop is the best choice for high-performance aircraft.

V-n Diagram.

They may be largely unknown today, but two French brothers were among those exploring battery-powered flight in the 1880s. By Dean Sigler.