About: Spratt Model 107

The Spratt Controlwing 107 was an unorthodox flying boat designed in the United States in the 1960s and marketed for home building in the 1970s. The aircraft featured a flat, speedboat-like hull with a square bow and with tailfins blended into each side. The fins were angled to form a butterfly tail and included no moving surfaces. The wings were mounted on struts, parasol-style, and also contained no moving surfaces. Rather, each of the two wings could pivot independently to vary their angle of attack. The pilot and a single passenger sat side by side in an open cockpit with a converted marine outboard motor mounted behind them that drove a pusher propeller. The flight controls consisted of a helicopter-style collective that varied the angle of attack of both wings simultaneously, and a