A Sig Four-Star 40 kit was modified to be a tow plane for 'smallish' gliders like the two modified Sig Risers I built last year. It gets motivation from an OS 40 FP glow engine. The fuselage deck was cut down to a flat top then a bubble canopy put on it. The wing has 'D' tube sheeting and there are slots at the wing ends. The tail feathers were modified in outline and 'stick built' in lieu of sheet balsa construction. It just needs a fuel tank, receiver and battery to maiden. Maybe there can be interest in aerotowing generated locally.
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Tow-Star 40
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