The brand new GY520 gyro is the smallest and lightest helicopter heading hold gyro available! It may be small, it may be light, weighing only 10grams complete, but it performs brilliantly, no matter whether in .90 size 3D aerobatic heli or a micro electric

RL30 has all the accuracy, ease of installation and flexibility for which RevLocks are renowned. But now, when you reach the limits of the power output of the engine, RL30 automatically modulates the maximum collective pitch available to prevent the engine becoming bogged down.