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I have a sky surfer (bixler) when i connect the battery to the esc it is not beeping i still can control the servos
But when i turn the throtle up the prop just vibrates and moves about half a rotation clock wise then anti clockwise and so on.does anyone know whats happening? Plz help

Ps the problem started after a hard landing.

*edit* the wires to the motor were loose now it works.
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