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Dynamic prop balancing demystified.

The Gweduck is a hero-class Experimental three decades in the making.

There are many ways to check the accuracy of your airplanes tachometer. From the commonplace to the offbeat, Jim Weir explains their benefits and drawbacks.

After studying Experimental aircraft, the National Transportation Safety Board developed 16 recommendations. Roy Beisswenger outlines the good, the bad and the still-needed.