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David Ullman

David Ullman
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Vortex Generators for Cooling

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A simple fix reduced CHTs in a Velocity by 55 degrees. By David G. Ullman.

Hear the Hum?

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Whats the buzz? David Ullman looks at the past, present and future of the electric airplane.

Electric Dreams Prevail at the CAFE Aircraft Symposium

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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

Rear Cockpit

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An inside look.

World Beater

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Rotax’s spunky 916 brings new tech and international appeal to a venerated design.

Metal Working 11-part Series

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Now the exceedingly popular and extraordinarily useful 11-part Build YourSkills: Metal Series is available as a single PDF. This must-have additionto your library was written by RV-7 builder Dan Checkoway and carefullyillustrated for first-time metal-workers and old hands alike. Mosteverything you need to now, from material handling and cutting to deburring,drilling and riveting is in this series.

Letters

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Weight ReductionI enjoyed David Paule's article about saving weight in aircraft construction . However,...