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What happens to a wind turbine if the wind is to strong?
If the wind is too strong, a wind turbine can shut down automatically to prevent damage. This is done by either pitching the turbine blades to reduce their angle of attack or by activating a brake system to stop the blades from spinning. Additionally, some wind turbines are designed to withstand high winds by having stronger materials and construction.
What force causes a spinning top to stop spinning?
The force of friction between the spinning top and the surface it is on causes it to stop spinning. Over time, the energy of the spinning top is transferred to the surface as heat, resulting in a decrease in the top's spinning speed until it comes to a stop.
Why will a spinning top not stay in motion forever?
It tends to lose rotational energy due to friction.
When a spinning top is just about to stop it reverse it's direction of spin. Why?
When a spinning top is about to stop, the friction between the top and the surface causes it to slow down. This friction can create forces that make the top wobble, leading it to reverse its direction of spin momentarily before coming to a complete stop.
What makes a helicopter spin?
It's Fuel and Blades.How helicopters fly and are controlledHelicopters truly are amazing aircraft, and how helicopters fly is what makes them such versatile machines, being perfectly suited to roles ranging from military use to fire fighting and search and rescue.Helicopters have been around for centuries - well, the principle anyway - but it was Russian aircraft pioneer Igor Sikorskywho designed, built and in 1939 flew the first fully controllable single rotor / tail rotor helicopter - the fundamental concept that would shape all future helicopters.Why helicopters are so versatileA normal airplane can fly forward, up, down, left and right. A helicopter can do all this plus has the ability to fly backwards, rotate 360 degrees on the spot and hover ie stay airborne with no directional movement at all. Helicopters may be limited in their speed, but the incredible maneuverability mentioned above is what makes them so useful in so many situations.Above, the directions a helicopter can move in and the associated name of controlControlling a helicopterHelicopters require a completely different method of control than airplanes and are much harder to master. Flying a helicopter requires constant concentration by the pilot, and a near-continuous flow of control corrections. A conventional helicopter has its main rotor above the fuselage which consists of 2 or more rotor blades extending out from a central rotor head, or hub, assembly.The primary component is the swash plate, located at the base of the rotor head. This swash plate consists of one non-revolving disc and one revolving disc mounted directly on top. The swash plate is connected to the cockpit control sticks and can be made to tilt in any direction, according to the cyclic stick movement made by the pilot, or moved up and down according to the collective lever movement.But first, to explain how the main rotor blades are moved by the pilot to control the movement of the helicopter, we need to understand pitch...The basics of pitchEach rotor blade has an airfoil profile similar to that of an airplane wing, and as the blades rotate through the air they generate lift in exactly the same way as an airplane wing does [read about that here]. The amount of lift generated is determined by the pitch angle (and speed) of each rotor blade as it moves through the air. Pitch angle is known as the Angle of Attack when the rotors are in motion, as shown below:This pitch angle of the blades is controlled in two ways - collective andcyclic....Collective controlThe collective control is made by moving a lever that rises up from the cockpit floor to the left of the pilot's seat, which in turn raises or lowers the swash plate on the main rotor shaft, without tilting it.This lever only moves up and down and corresponds directly to the desired movement of the helicopter; lifting the lever will result in the helicopter rising while lowering it will cause the helicopter to sink. At the end of the collective lever is the throttle control, explained further down the page.As the swash plate rises or falls, so it changes the pitch of all rotor blades at the same time and to the same degree. Because all blades are changing pitch together, or 'collectively', the change in lift remains constant throughout every full rotation of the blades. Therefore, there is no tendency for the helicopter to move in any direction other than straight up or down.The illustrations below show the effect of raising the collective control on the swash plate and rotor blades. The connecting rods run from the swash plate to the leading edge of the rotor blades; as the plate rises or falls, so all blades are tilted exactly the same way and amount.Of course, real rotor head systems are far more complicated than this picture shows, but the basics are the same.Cyclic controlThe cyclic control is made by moving the control stick that rises up from the cockpit floor between the pilot's knees, and can be moved in all directions other than up and down.Like the collective control, these cyclic stick movements correspond to the directional movement of the helicopter; moving the cyclic stick forward makes the helicopter fly forwards while bringing the stick back slows the helicopter and even makes it fly backwards. Moving the stick to the left or right makes the helicopter roll and turn in these directions.The cyclic control works by tilting the swash plate and increasing the pitch angle of a rotor blade at a given point in the rotation, while decreasing the angle when the blade has spun through 180 degrees.As the pitch angle changes, so the lift generated by each blade changes and as a result the helicopter becomes 'unbalanced' and so tips towards whichever side is experiencing the lesser amount of lift.The illustrations below show the effect of cyclic controlon the swash plate and rotor blades. As the swash plate is tilted, the opposing rods move in opposite directions. The position of the rods - and hence the pitch of the individual blades - is different at any given point of rotation, thus generating different amounts of lift around the rotor disc.To understand cyclic control another way is to picture the rotor disc, which is the imaginary circle above the helicopter created by the spinning blades, and to imagine a plate sat flat on top of the cyclic stick. As the stick is leaned over in any direction, so the angle of the plate changes very slightly. This change of angle corresponds directly to what is happening to the rotor disc at the same time ie the side of the plate that is higher represents the side of the rotor disc generating more lift.Above, the layout of helicopter controls in relation to the pilot's seatRotational (yaw) controlAt the very rear of the helicopter's tail boom is thetail rotor - a vertically mounted blade very similar to a conventional airplane propeller. This tail rotor is used to control the yaw, or rotation, of the helicopter (iewhich way the nose is pointing) and to explain this we first need to understand torque.Torque is a natural force that causes rotational movement, and in a helicopter it is caused by the spinning main rotor blades; when the blades are spinning then the natural reaction to that is for the fuselage of the helicopter to start spinning in theopposite direction to the rotors. If this torque isn't controlled, the helicopter would just spin round hopelessly!So to beat the reaction of the torque, the tail rotor is used and is connected by rods and gears to the main rotor so that it turns whenever the main rotor is spinning.As the tail rotor spins it generates thrust in exactly the same way as an airplane propeller does. This sideways thrust prevents the helicopter fuselage from trying to spin against the main rotor, and the pitch angle of the tail rotor blades can be changed by the pilot to control the amount of thrust produced.Increasing the pitch angle of the tail rotor blades will increase the thrust, which in turn will push the helicopter round in the same direction as the main rotor blades. Decreasing the pitch angle decreases the amount of thrust and so the natural torque takes over, letting the helicopter rotate in the opposite direction to the main rotors.The pilot controls the pitch angle of the tail rotor blades by two pedals at his feet, in exactly the same way as the rudder movement is controlled in an airplane.NOTAR is an alternative method of yaw control on some helicopters - instead of a tail rotor to generate thrust, compressed air is blown out of the tail boom through moveable slots. These slots are controlled by the pilot's pedals in the same way as a tail rotor is. To generate more thrust, the slots are opened to let out more air, and vice versa.NOTAR helicopters respond to yaw control in exactly the same way as tail rotor models and have a big safety advantage - tail rotors can be very hazardous while operating on or close to the ground and in flight a failing tail rotor will almost always result in a crash.Throttle controlThe throttle control is a 'twist-grip' on the end of the collective lever and is linked directly to the movement of the lever so that engine RPM is always correct at any given collective setting. Because the cyclic and collective pitch control determines the movement of the helicopter, the engine RPM does not need to be adjusted like an airplane engine does. So during normal flying, constant engine speed (RPM) is maintained and the pilot only needs to 'fine tune' the throttle settings when necessary.There is, however, a direct correlation between engine power and yaw control in a helicopter - faster spinning main rotor blades generate more torque, so greater pitch is needed in the tail rotor blades to generate more thrust.It's worth noting that each separate control of a helicopter is easy to understand and operate; the difficulty comes in using all controls together, where the co-ordination has to be perfect! Moving one control drastically effects the other controls, and so they too have to be moved to compensate.This continuous correction of all controls together is what makes flying a helicopter so intense. Indeed, as a helicopter pilot once said... "You don't fly a helicopter, you just stop it from crashing"!
Do the rear blades of a helicopter lift the helicopter?
NO, the main rotor does the lifting and the small rear propeller is used to stop it spinning around and help with steering it.
How stop RC helicopter from spinning?
To stop an RC helicopter from spinning, you can adjust the trim settings on your transmitter, specifically the yaw trim, to counteract any unwanted rotational movement. Additionally, ensure that the rotor blades are properly balanced and aligned, as uneven blades can cause instability. If the helicopter is still spinning, check for issues with the gyroscope or electronic stabilization systems, as these components help maintain stable flight. Finally, practice gentle control inputs to stabilize the helicopter during flight.
What happen if he blades stop spinning on a helicopter when it is in the sky?
If the rotor blades of a helicopter stop spinning while in the sky, the helicopter will begin to lose lift and descend rapidly. It would enter a condition known as autorotation, where the helicopter can glide down safely by allowing the rotor blades to spin freely due to the downward motion of the aircraft. However, without engine power, the pilot would need to manage the descent carefully to achieve a safe landing. If not handled properly, it could lead to a crash.
How do you stop an air hog helicopter from spinning?
Trim it by turning the trim knob in the opposite direction that it is spinning
What happens when theres no wind on a wind turbinde?
The blades stop turning and no electricity is generated.
What happens if greater than 1000cc emptied from bladder?
Nothing particular happens. I hope you did not expect the world to stop spinning!
When was Stop Spinning created?
Stop Spinning was created in 1985.
When a train won't stop would it work if a helicopter hooked a chain to the train an pulled back?
A very larg helicopter may be able to take off with an added 50,000 lbs. of weight. A good sized modern train is going to be significantly larger than this. The helicopter's blades would likely give out as they are suddenly reversed if you just "slammed on the brakes" so to speak. If you had the helicopter going at the same speed as the train, and slowled the helicopter down as much as possible, the train would eventually stop if the locomotives were not powering the wheels (it would stop without the helicopter, too, and would be infinitely safer for the helicopter pilot). If the locomotive is powering the wheels, the helicopter's not going to do a whole lot.
What happens when the earth stop spinning?
The earth wont stop spinning unless something big hits it - then we would all die from the collision. A counter rotational force is required to stop the earths spin, otherwise it will just go on rotating.
What happens to a wind turbine if the wind is to strong?
If the wind is too strong, a wind turbine can shut down automatically to prevent damage. This is done by either pitching the turbine blades to reduce their angle of attack or by activating a brake system to stop the blades from spinning. Additionally, some wind turbines are designed to withstand high winds by having stronger materials and construction.
What force causes a spinning top to stop spinning?
The force of friction between the spinning top and the surface it is on causes it to stop spinning. Over time, the energy of the spinning top is transferred to the surface as heat, resulting in a decrease in the top's spinning speed until it comes to a stop.
What would happen if the coils in a generator stopped spinning?
If the coils in a generator stop spinning, there would be no change in the magnetic flux passing through them, and thus no induced current would be generated. This means the generator would stop producing electrical energy.
