Electric Convers
ELECTRIC POWER IS USED in every type of model-world-class gliders, high-performance Pylon racers, and majestic Old-Timers. But perhaps the real niche for Electric is in large Scale models. During the past three years I have built and competed with two 1/4-scale models that used AstroFlight electric motors. The first airplane was built and converted from a Sig Piper J-3 Cub kit. The recommended power for that model was a 90 or 1.20 four-stroke engine, but I installed a direct-drive Astro cobalt 90 Sport motor. I flew this airplane for a year and I liked it so well that I built one similar to it; I converted a Sig J-3 kit into a Piper PA-12 Super Cruiser, also with an AstroFlight 90, but it included one of Astro's helical gearboxes.
