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Dragonfly 5 has
two sets of main rotors and a freewheeling tail rotor that does not affect
flight. The counter-rotating main rotors eliminate the need for tail rotor
compensation because they move in opposite directions, canceling each
other’s rotational torque . In addition, the blade sets give it an added bit
of gyroscopic stability, which allows mere mortals to hover it with prowess.
The lower rotor provides cyclic control
for the heli. To yaw the helicopter (left and right), one of the main rotors
either slows down or speeds up to create an imbalance in torque. This
results in the Dragonfly 5 turning in the direction opposite to the rotation
of the faster moving rotor. Since the Dragonfly 5 is fixed pitch, collective
control is governed exclusively by throttle.
On the Dragonfly 5, the roll cyclic is a
bit more responsive than its pitch cyclic (fore/aft control). This is
because the very small range of cyclic control can more easily roll the heli
than it can pitch it along the length of the body. This attribute actually
helps make the Dragonfly 5 stable. For a heli of this size, the
responsiveness on both axes is appropriate.
For beginners, flying the Dragonfly 5 out
of ground effect (first few inches off the ground) is not difficult either.
Unlike other micros, the Dragonfly 5 tends to rise evenly rather than skate
across the floor laterally. If you punch the throttle, it has no hesitation
in climb either.
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