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
A Very Special Oshkosh
This year’s AirVenture set records for attendance, so says EAA. I learned this after...
Super Cub Kit Comparison
Super Cubs are beloved by many a backcountry adventurer, and several kits offer options to meet the demand of builders interested in these sturdy workhorses.
Free Flight
Thousands of hours of flight time in a pilots logbook are no guarantee of superior skill-or superior judgment.