But when a helicopter lifts into a hover, this friction disappears and without some form of anti-torque system, the helicopter would spin. When the helicopter is sitting on the ground, the friction of the wheels or skid on the ground prevents the fuselage from spinning in the opposite direction to the main rotor. Think of it like drilling a hole and the drill bit sticks, the drill wants to rotate around and hit you. Because of Newton’s Third Law ‘For Every Action, There is an Equal and Opposite Reaction’ this makes the fuselage want to rotate in the opposite direction to the main rotor. When a helicopter is working correctly the engine drives the main rotor via a transmission. Depending on where it happens, can mean the difference between a survivable landing or not.
#SPINNING HELIOS BUST SIMULATOR#
Having had the opportunity to practice many different crash prevention techniques in a full-motion simulator I am able to tell you a little bit about why this happens and what the pilots can and can not do about it.Ī helicopter going into a spin is one of the most terrifying emergencies a pilot may have to deal with.
When the torque of the engine is greater than the thrust being produced by the anti-torque system, the helicopter will begin to spin. Why do they spin out of control and why don’t the pilots stop it and prevent the crash? There have been a few famous videos of where fatal accidents have followed a helicopter spinning out of control, the most recent was the Leonardo AW169 taking off from Leicester City Soccer Stadium in the UK.Ī helicopter may spin out of control when the anti-torque system is unable to counteract the torque being created by the engine. Helicopters have been filmed many times spinning out of control, usually just before they crash.
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