Dynamic rollover

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As a helicopter becomes light on its skids, any small sideways movement can cause a skid to catch on the ground. If this happens, the helicopter will begin to rotate slightly about the caught skid; this causes the main rotor to tilt, causing more thrust in the direction of the lean and pushing the helicopter over faster. This is dynamic rollover.

Dynamic rollover ends in one of two ways: either the pilot lowers the collective swiftly before the helicopter rolls too far, or the helicopter rolls over and the main blades contact the ground, with the usual disastrous results.

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