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Donald J. Berk



Converting a Strojnik S2A motorglider from gas to electric power.

In Case You Missed it

Down To Earth

Homebuilt aircraft played a key role in bringing aid to the Bahamas after Hurricane Irene. Amy Laboda explains how you can join in future relief efforts.

The Kitchen Window

BD-4 builder Steven Mahoney commandeers the family's four-burner kitchen appliance to complete a mod for his airplane, and lives to tell the tale.

Design Process: Vertical Tail Planform

The size and shape of the planform of the vertical tail determine its ability...

Design Process: Braced Wings

As we saw last month, the designer has two fundamental choices of wing structural...