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
Sportsman Drops Some Weight—Light Planes Perform Better
How one builder shaved 200 pounds off his Glasair Sportsman.
Star Bird!
Luxury and efficiency join elegantly in this unique blend of twin engines and canard airframe.
Flush Rivet Removal
There can be more than 10,000 rivets in an aluminum kit aircraft. Given that many opportunities for errors, you’ll surely need to replace a few.