Richard Keyt

I am now in the flight-testing stage with my Hummingbird helicopter. Personally, I’ve always...

Larry Simpsons first building experience was deepened by his engine choice: an Eggenfellner H6 Subaru conversion. His attention to detail and tailored modifications led to more of a hands-on experience than he expected-sometimes frustrating, expensive and fascinating. By Larry Simpson.

This month we use the accumulated flight-test data to determine what exactly is causing the unacceptable flying qualities of the airplane so that the best way to fix the problem can be identified;

Sometimes using a constant-speed prop makes sense, but the decision is often a compromise among weight, cost and performance. By Marc Cook.