Tag: foundation

DAR Mel Asberry answers questions about when you need A&P signoff, re-certifying an airplane to make it an LSA (hint: cant be done) and pre-registration of an Experimental.

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.

On some airplanes, the basic empennage does not provide acceptable flying qualities in all...

Patrick Panzera explains some specific formulas he uses to see if an engine' claimed numbers pass muster.