![[Credit: Mike Davenport]](https://www.kitplanes.com/wp-content/uploads/2026/08/Over-Stave-Lake-3.jpg?w=534&h=462&crop=1 "Glasair Sportsman 2+2 Build Part 3")
![Coming in for a landing at Humberd’s Farm [All Images Credited to Jon Humberd]](https://www.kitplanes.com/wp-content/uploads/2026/07/9-1.jpg?w=265&h=198&crop=1 "Overcoming Setbacks on the Zenith 750SD Xtreme")
![Humberd and his daughter using the 701 for some farm duty transportation. [All Images Credited to Jon Humberd]](https://www.kitplanes.com/wp-content/uploads/2026/05/1-3.jpg?w=265&h=198&crop=1 "Builder’s Spotlight")
![Checking out East Tennessee scenery from the 701. [Credit: Jon Humberd]](https://www.kitplanes.com/wp-content/uploads/2026/04/3.jpg?w=265&h=198&crop=1 "Builder’s Spotlight")
![[Credit: Jon Humberd]](https://www.kitplanes.com/wp-content/uploads/2026/02/20-2.jpg?w=265&h=198&crop=1 "Epic Is Back")
Return of the Turbo-Compound
Everything old is new again. Paul Lamar looks at the turbo-compound engine, developed in the post-WW-II era. Thrown over for jet engines, it may yet hold promise today as we search for more energy efficient ways to get the most out of increasingly expensive fuel.
All About Avionics: Wiring Bundles
Anyone can make wiring look good. The bonus is that your installations maintenance and future upgrades will be much easier. Stein Bruch shows you how.
Designer Spotlight: Lawrence B. Sperry
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.
The Price of Power
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.
Freedom to See It Differently
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?
To Launch a Light Sport
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.
Cool Runnings
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.
To Launch a Light Sport
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.
In Case You Missed It
Label Those Wires!
A look behind most homebuilt instrument panels will present a maze of electrical wires....
A Tale of Two RVs
“Homebuilt” aptly describes where most project aircraft are assembled. But as you approach the...
