Final answer:
Dynamic rollover involves pivotal factors such as a stationary pivot point, an initiating rolling motion, and the critical angle being exceeded. This can be further influenced by a helicopter's high center of gravity, rotor RPM, and environmental conditions like surface slope or wind.
Step-by-step explanation:
To get into dynamic rollover, several key factors need to be present in the operation of a helicopter. Dynamic rollover is a condition unique to rotorcraft, which occurs when the helicopter pivots around one of its skids or wheels, resulting in the aircraft, potentially, rolling over. The phenomenon typically requires a combination of three main conditions: a pivot point, a rolling motion, and an exceeding of the critical rollover angle.
The first requirement for dynamic rollover is the existence of a pivot point, which is typically a stationary skid or wheel. The second requirement is a rolling motion; this could be initiated by a variety of factors, such as pilot input, ground contact during takeoff or landing, or wind. Lastly, the situation becomes critical when the rollover angle - the angle between the ground and the line passing through the pivot point and the helicopter's center of gravity – is exceeded. Additionally, factors such as a high center of gravity, low main rotor RPM, and environmental conditions like slope of the surface or wind can contribute to the occurrence of dynamic rollover.