I fit a full K & S EP conversion on this hely so now it is a 12s F3C helicopter. The EP conversion kit comes with new lower frames, engine and esc mount and pinion.
The motor is a Scorpion 450kv; so costant 2000rpm, on rotor, is possible for F3C aerobatics. The Sylphide comes with a Kontronic 120HV ESC, BLS252 servos on cyclic, GY520 gyro and K&S 680 Carbon blades. Awesome.