H-7mk4

This craft has flapping wings and rotors spinning on all 3 axes. Twin contra-rotating autogyro rotors on top provide most of the lift, while the 3 rotors in the back add some directional stability. The flapping wings must provide balanced lift to avoid turning or rolling and crashing. The sideways paper clip in front slides along a paper strip to adjust the CG, to supplement the elevator in the back for pitch and glide control.

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