Tim Kern
Engine Beat
Exhaust systems do more than just get air into and out of aircraft engines. Exhaust system design, in terms of exhaust pipe length, diameter and tuning, affect the efficiency and performance of the engine, for better or worse.
In Case You Missed It
Wind Tunnel
Multiple engines complicate design, because not only must the airplane be able to maintain flight on one engine, but also the pilot must be able to control it. Lateral/directional stability issues are key;
Build A Spark Plug Resistance Tester
Checking resistance is an important part of plug maintenance. By Michel Suire.
25th Anniversary: Power Shift
From scrounging engines to building Experimental powerplants: Editor-in-Chief Marc Cook looks at the last 25 years in engine choices for homebuilders.
Build Your Skills: Composites (Part 6)
In this series installment, author Bob Fritz takes you through the basics of a three-day project you can really use: lightweight fiberglass wheel chocks. The article covers materials, cutting, patterns, foam cutting, eliminating bubbles, and pitfalls to look out for during the build; by Bob Fritz.