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How does the size of a helicopter blade affect the speed of rotation?
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Does adding mass to a paper helicopter affect the rotation speed of the helicopter?
If you are adding mass to the outside of the blades, it will make the blades rotate much more slowly. However if you add mass to the inside of the blades it will increase the rotational speed, however more force will be needed to start the rotation.
How does the blades on a wind turbine contribute to the energy change?
wind pushes on the blades of the wind turbine which pass on this motion to the generator to produce electricity. The energy and the speed of a wind turbine depend on the blade pitch control which depends on the angel of the blade chord to the plane of rotation. The blade pitch determines the speed of the turbine which also depends on the wind speed. Energy is directly proportional to the speed of the turbine. Therefore, the energy produced by a turbine depends on both the wind speed and the blade pitch angle. By: Amin Elsersawi
Does the length of the wings affect the speed of a paper helicopter?
ya it does it makes it fall slower because of more things for the air to travel around
What happens to the advancing blade of a helicopter?
The "advancing blade" of a helicopter refers to the side of the rotor which moves forward in relation to the fuselage. As each rotor blade makes a full circle around the center, on one side of the swing, it moves forward, and on the opposite side it is moving towards the rear of the helicopter. When the helicopter is moving forward in air, the rotor blades on the advancing side are moving at a higher airspeed than the rotor blades elsewhere. Rotor speed + aircrafts forward airspeed. This results in slightly more lift on that side. Conversely the exact opposite is happening on the other side where you get Rotor speed - aircraft forward airspeed. This creates a tendency for helicopters to want to roll at high airspeed. This is one of the many odd tendencies of rotor aircraft that pilots are constantly adjusting to balance out.
What happens to the rotation of a spinning platform diver as he brings his arms in closer to his axis of rotation?
The rotation increases in speed.
Does adding mass to a paper helicopter affect the rotation speed of the helicopter?
If you are adding mass to the outside of the blades, it will make the blades rotate much more slowly. However if you add mass to the inside of the blades it will increase the rotational speed, however more force will be needed to start the rotation.
How fast would a helicopter blade need to be to catch the air on fire?
Since air is not inherently flammable, there is no speed at which a helicopter blade would catch the air on fire.
In a wind turbine - does increasing the blade length or decreasing the blade length increases the speed of the turbine?
Decreasing the blade length will increase the rotation speed, and thus the turbine speed ( for constant wind speed ).
What is the phenomenon called that limits a helicopter's maximum speed?
Retreating blade stall.
What increases the thrust of an helicopter?
The 'angle of incidence ' of the rotor blades and blade speed.
How fast will the helicopters go in the future?
Not much faster. True helicopters are limited in airspeed. The helicopter blade can not fly faster than the speed of sound or it begins to flutter and even stall. The advancing blade has to go through the air faster than the retreating blade. The speed of the blade is the sum of the speed of the helicopter in forward flight plus(+) the rotational speed of the turning blades. If they can design a blade that will work at slow speeds and at speeds greater than Mach 1, then maybe they can build a faster helicopter.
How does earth's varying orbital speed affect it's rotation?
The earth's orbital speed has no influence or effect on its rotation.
Why do helicopters fly so slow?
What is the limiting factor for helicopter speed you ask? What happens to the rotor as the velocity of the helicopter increases? The relative speed of the tips of the rotors changes because of the wind speed. On the advancing side of the rotor the speed increases by the speed of the helicopter. On the retreating side of the rotor the speed decreases by the speed of the rotor. One of two things happens as the helicopter reaches a high speed: A: If it is a large rotor, the advancing blade will reach the sound barrier and sap energy from the rotor, slowing it. Significant damage may occur to the helicopter. B: If it is a smaller rotor, the retreating blade will slow to the point where stall occurs, and the helicopter will be forced into a turn while losing altitude and decreasing speed, then it will usually recover if altitude permits. Option B can be mitigated by increasing rotor RPM at higher speeds. In this case the rotor speed becomes the limiting factor, as the centrifugal forces at the root of the blade are quite incredible. Carter
Why a helicopter falling during auto-rotation could reach a terminal speed without the pilot changing any controls?
The helicopter begins to fall because gravity is pulling its weight. As the helicopter accelerates, the air passing past the helicopter creates drag, as the helicopter continues to accelerate the drag Increases until the drag becomes equal to the weight, stopping it from accelerating. Even if the helicopter did not auto rotate it would still reach a terminal speed, however the terminal speed for the non auto rotating helicopter would be a lot higher and the helicopter would take longer to reach this speed.
What are the limitations of the maximum forward speed of a helicopter?
Helicopter blades act in the same way as the wings of an airplane. They generate lift with the air flowing faster on the top of the airfoil then on the bottom. When you reach a certain speed, depending on blade specifications and limits, the air flowing over the blades become equal on the top and bottom of the airfoil. This is what is known as blade stall. The blades no longer generate lift. The same effect in fixed wing aircraft is known as a speed stall. This concept also takes place when a helicopter flies too high. As the air thins with altitude eventually there is not enough air for the blade to "bite". Thus blade stall again.
What RPM does a helicopter blade spin at?
Ranges from 250 to 450 rpm.. If there is need to increase the speed then the rpm is eventually increased as per the need
Why can't you attach a jet engine to a helicopter with similar results?
Question is not very clear. Most modern Helicopters are powered by turbo-jet engines that drive a transmission gearbox to turn the rotor blades. Jet engines have been attached to the tips of the main rotor blades. This design was used to turn the blades faster and have a smaller engine and gearbox. The forward velocity of a typical helicopter is limited by the tip speed of the rotor blades. The tip speed of the advancing blade is the sum of the airspeed of the helicopter and the speed of the blade. That is why helicopters are limited to ~150mph. If a jet engine was installed to push it faster, then either -A- the rotor blade would hit the sound barrier and become unstable or -B- the rotor blade would have to be stopped and the helicopter would have to fly using lift from a wing.
