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What is helicopter rotor and propeller?
The rotor is like the engine to the propeller. A propeller is the fan like blades on the top that spin to make the helicopter fly.
What is the shape of a helicopters wings?
The helicopter main rotor blades have an airfoil shape like an airplanes wing. The entire blade can also be angled by the pilot,through the rotor head. This angle makes it fly or lift.
What is an autogyro?
An autogyro looks like a helicopter with a rotor blade on the top of the fuselage but it also has another propeller in back to push it. The autogyro uses the air passing UP through the rotor blade to turn the main rotor blade and give it LIFT. So it needs something to provide THRUST to propel it forward. An autogyro can NOT take off vertically and go straight up. Instead it must have a take-off roll to get it flying. The main rotor of a helicopter is more complicated and it produces both LIFT and THRUST. Their controls are more complicated and the loads on the blades and blade attachments and the rotor Mast. The Autogyro's blades turns due to air passing through it just like a maple seed "flys" with its single wing as it falls from the tree. Since the main rotor of the Autogyro does not produce a vertical Lift, that means the Mast of the rotor does not carry a torque load. The Mast only supports the weight of the Autogyro. Whereas, the Mast of the Helicopter is experiencing Torque loads and Bending loads(for some types of helicopters) as well as Tension forces by the weight of the helicopter.
What are the two small propellers on a helicopter?
Oh, dude, those little spinny things on a helicopter are called the tail rotor and the main rotor. The tail rotor helps the helicopter not spin out of control, and the main rotor is like the big boss that actually lifts the whole thing up. So yeah, those propellers are pretty important for not crashing and stuff.
How does a helicopter stay in the air?
The source of lift force from the rotor (Rotation of two objects 'blade' creates a lifting force) blades allows the helicopter to stay in one area for extended periods of time. Each rotor blade, whether it is 2 or 7, has the ability to change pitch. This means the blade can rotate so that the nose or leading edge can tilt down or up. If it pitches up, the lift of the blade increases. Collective Controls As the blades rotate it produces lift. The pilot inputs controls that increases the pitch on all the blades at once. All the blades pitch up and produce more lift, so the helicopter rises. Cyclic Controls The pitch of the blades can also be controlled so that the blade pitches UP when it is on one side of the helicopter and pitches DOWN when it is on the other side. As the advancing blade is moving from rear to front, it decreases it Lift. Then as the blade moves to other side, it increases its Lift and pushes the helo through the air. In a simply explanation, this is what causes the helicopter to fly forward. Think of it like someone paddling a canoe. On many helicopters, the input is accomplished through the controls of the Swashplate. Custermen - Worked 11 years at Bell Helicopter.
Why do helicopters make noise?
The source of the noise made by Helicopters are created by several things. The engines can make noise just like any airplane. The transmissions can make a high frequency noise. The destinctive sound of helicopters is the "whop-whop-whop" it makes. This is caused by the rotor blades as it rotates.One reason for this sound is one blade passes and creates a vortex(or whirling tunnel of air) and then the next blade slaps this vortex.Another reason is that each blade must change pitch angle as it rotates around the central mast. When the blade is on one side of the helicopter, it has a high pitch and creates a high lift and therefore a large turbulent vortex. Then as it rotates to the other side of the helicopter, the blade must decrease its pitch angle, sometimes to almost zero angle. This rapid change in high blade angle and low angle causes this blade sounds.newtest3
What is a back rotor of a helicopter used for?
it depends. sometimes they make the helicopter turn. On models when they are facing up like the main rotor, they propell it forward so the gyro can fall to one side and lean the chopper forward. The major purpose of the back rotor is to counteract the torque of the main rotor. On helicopters with a single top rotor, if there were no back rotor, the torque would cause the helicopter to spin around as soon as it lifted off the ground.
How a helicopter used of thrust for flying?
The main rotor of a helicopter is actually a set of wings that turn. They produce lift, just like the wings of an airplane. To change direction, the rotor is tilted, and the helicopter is PULLED in that direction.
How helicopter is go up high?
because of its blade that looks like a fan
Why does it sound like a helicopter in my ear?
you have tinnitus
Why does a helicopter fly?
The rotor, shaped like an aeroplane wing, creates lift in the same way. The problem is in maintaining stability, as it will cause the body of the helicopter to rotate, too. That is why most helicopters have a tail rotor, to counter that effect and grant the pilot stability.
What was the insparation of the helicopter?
Leonardo di Vinci drew a device that resembled a helicopter and the rotor looked like a large screw. Later in the 1900's, some people tried built helicopters with a large rotor that tapered to a point like a screw. This was one inspiration. They had the idea that the screw-rotor could screw up into the air.
