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
Spare the Wait and Carry On
What began, for one homebuilder, as a cross-country odyssey to AirVenture turned into an...
Ask the DAR
Can you use Function Code 33 to amend Experimental aircraft limitations and flight-test locations?
Aero ‘lectrics
Using LEDs for lighting an aircraft has much to commend it. Low draw, reasonable cost, long life, good visibility. This month, Jim Weir takes us through the beginning steps of building these lighting systems yourself, using off-the-shelf parts and a little ingenuity.