Builder Spotlight

Amy Laboda takes a look at the life of inventor Lawrence Sperry, whose childhood fascination with a spinning top led to his development of critical flight control systems...and even the aircraft seat belt.

More power! Bob Fritz takes a close look at what makes batteries go, what kind is best for your plane, and how to get the most out of your battery.

Jeff Van West flight-tests two popular EFISes in a Remos GX LSA, and examines their accuracy, user interface and reliability. After all the stones have been unturned, your choice can be simplified: Are you a Mac or a PC?

Its 90% done with 90% to go! Bob Fritz has a flyable airplane and a semi-long list of things still left to do to improve it.

Builders share their successes.

Norm Ellis does the math and shows you how to select the right oil cooler for your engine-cooling package. Given the critical role oil temperature plays in engine health, its a good idea to go beyond selecting the smallest, lightest and cheapest cooler you can find.

Bob Fritz presses on! In this installment, he powers up the Grand Rapids Technologies EFIS panel, solves a curious com antenna problem, installs the Zaon PCAS, fits the door to the fuselage’s curvature, and streamlines the air flow to the oil cooler.

Builders share their successes.

Phillips? Flat head? Double blade? Bob Fritz clears up questions you didn't even know you had about screwdrivers. When you're building a plane, the right tool for the right job (and right space) really does matter.

Don't let unsightly cable-exit holes spoil the look or performance of your aircraft.