Flutter Flutter Specifications: 42 inch wingspan / 17inch length / 328inch wingarea / 15ounce weight / 7ounce wingloading. A swept back, elliptical, undercambered flying wing. NACA 6308 airfoil.

Controls: elevons.

Equipment: Two Cirrus CS-10BB servos, Hitec 555 receiver, 7.2v speed 400 motor, Robbe 6x3.5 folding prop, 6 or 7 - 500ma or 600ma cells, Jeti JES10 ESC.

Construction materials: Balsa, spruce, 1/16 plywood and covered with Monocote.

Comments: The Flutter was originally designed to be a slowfly plane and yes it does that well. It once used the Bleriot motor gearbox prop combination but the prop was ridged and I kept breaking the gearbox head. So I stuck a speed 400 motor into the fuselage and a folding prop and a completely different plane was born. The Flutter will slow to a crawl in a tiny breeze but turn the power up and it turns into a rocket. It will float in mild lift and long flights are possible.

The Flutter is a lot of fun to fly. It does loops and rolls but the undercamber wing makes inverted flight difficult. It soars well and detects lift well. The Flutter has a wide flying envelope and a gentle handlaunch is all it takes to get it into the air. It flies well on 6 cells and there is just more power with 7 cells. The speed of this little plane will surprise you.

A couple of drawbacks with a flying wing and particularly the Flutter are that the CG must be placed far forward to dampen out the pitch sensitivity. What this does is cut down on the glide performance. Maybe doing more work with moving the CG back and shortening the surface throws and this difficulty might be overcome. I only have so much time to look into these ideas and their problems. Another drawback is the need to have a transmitter that has the elevon function. But this is becoming a standard function.