C c_fly New member Sep 12, 2019 #1 Sep 12, 2019 #1 Hi: I plan to use EMAX GT2215 motor with flite test ESC 20A. Is that safe? or I need a bigger ESC such as 30A. The spec of the plane : battery 3s 850 75c lipo and 10x4.5 prop. Thank you.