David Ullman
Vortex Generators for Cooling
A simple fix reduced CHTs in a Velocity by 55 degrees. By David G. Ullman.
Hear the Hum?
Whats the buzz? David Ullman looks at the past, present and future of the electric airplane.
Electric Dreams Prevail at the CAFE Aircraft Symposium
Among the topics covered at the third annual Electric Aircraft Symposium were climate science, battery and motor technology, and aircraft designs, both real and imagined.
In Case You Missed It
Vortex Generators and STOL Performance
One way to solve the problem of flow separation—and stall—is by installing vortex generators on your kit aircraft.
Start Building Your Aircraft With a Subkit
Deciding to build an aircraft does not have to be one big, final decision.
Kitfox vs. Kitfox
A side-by-side comparison between an old Kitfox Model 4 and a new Kitfox Series 7 Super Sport SLSA. And the winner is?