I have an same issue.. Using Turnigy Carbon fiber 9047 props with Turnigy Park 450 1200kv motor.. One of my props is getting unscrewed from the motor, even if its on ground, and on increasing throttle a bit.. That's the only thing avoiding me flying my Quad.. Anybody faced this issue..?? Any solution..?? My model weight is hardly 900grams..!!!!
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