The easy step up to aerobatic precision After mastering sport models, you want to try your hand at precise, pattern-like aerobatics. Make the transition with surprisingly little effort and expense using Great Planes' Tracer. Unlike fiberglass models, it builds quickly from CAD engineered, perfectly interlocking wood parts - in a kit with the completeness you have come to expect from Great Planes. And since it flies well with a sport .40 engine, your budget also gets a break! Tracks arrow-straight, with positive control response and comforting low-speed transitions. Delivers responsive, exhilarating flight performance without requiring high-torque servos, "hot" engines, tuned pipes and other expensive gear. Engineered very similar to large, expensive pattern kits - even uses the popular Eppler 168 airfoil. Dual aileron servos simplify set-up and increase the precision of aileron response for crisp aerobatics. Photo-illustrated assembly manual also covers installation of optional retracts (Hobbico Mechanical Retracts, HCAP4010, recommended).