Circle Whirly (oz9418)
About this Plan
Circle Whirly (Jumpin Giro). Round the pole autogyro model, for K&B Infant .020 power. From Air Trails Annual, 1958.
Quote: "Jurmpin' Giro is an ideal model for schoolyards, small parks and gyms. Any place where an 8 to 14-foot tether line can be accommodated is room enough to fly this RTP model. It is almost indestructible and it cannot stall. Four-bladed rotors provide over three-quarters of the lift, small stub wings are for lateral stability and model can be flown without these. The pylon around which the model flies should be from 30 to 36 inches high with a good strong base. The new Pee Wee or old Infant .020 takes this model up nicely; no larger engine should be used as the speed would be too great. Our Infant was shock rubber band mounted, which helps when you have to put in some more side or down thrust. The small stub wings plug in so you can experiment with different flight trims. A 5x3 wooden prop provided the thrust. This model is ideal for air pick-up tricks or other similar stunts. I would suggest a large tank to provide longer time in the air. Construction is very simple. Entire model is of medium grain 1/16 inch sheet balsa. Build the crutch, then cement two sides to it.."
Here's one more plan, Circle Whirly from Air Trail Model Annual 1958, this one comes to us from Roy Tiller over at the DBHL website. Enjoy, Ratracer
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