Paul Berg

Inadequate rudder stop.

A technology developed by ham radio operators, called automatic position reporting system (APRS), coupled with low-cost GPS receivers, a decent antenna and the World Wide Web, have made it possible to track light-aircraft flights without incurring access or subscription fees. Yes, you'll need to get a Technician license for radio operators, but thats a minor obstacle if this system is something you want or need to use.

Engine basics and layouts-why our engines are shaped the way they are.

Documenting your build. By David Boeshaar.