The way to reduce or eliminate excess cooling drag in cruise is to use a variable-geometry cooling system that can change shape to control the amount of air flowing through the cowling.
If flying a rotorcraft is your goal, this is a great time to start exploring your options—there’s been growth in this segment, and even more expansion is on the horizon. By Roy Beisswenger.
While on a routine technical counselor consultation, Paul Dye discovered hidden treasure: Richard VanGrunsven’s original RV-1. He details a bit about its history and preparations for its planned tour this summer.