自製反斗旋風機
Material : Foam plane

Packing size : 10 x 6 inch 
Holding a venter of the airframe with thumb and forefinger vertically and direct a head of the airframe upwards. 

The place to hold the airframe is a little behind of a weight. 

Its have SCREW FLIGHT and TORNADO FLIGHT, HIT FLIGHT, CATCHING FLIGHT,and BACK SCREW FLIGHT which can create by your own flight!