Helicopters

Bernoulli's principle states that as the speed of a fluid increases, its pressure decreases. In a helicopter, the rotor blades create lift by moving through the air at a high speed. This creates a pressure difference between the top and bottom of the blades, generating lift and allowing the helicopter to fly.

The weight of the helicopter affects the terminal speed by influencing the rate at which the helicopter falls. A heavier helicopter will reach a higher terminal velocity compared to a lighter helicopter, as the force of gravity will be greater on the heavier helicopter, causing it to accelerate faster. Additionally, a heavier helicopter may require more lift to counteract its weight, which can also impact its terminal speed.

If a helicopter blade stops spinning in the sky, the helicopter will experience a rapid descent known as autorotation. This is when the airflow through the rotor keeps the blades spinning, allowing the helicopter to land safely even without engine power. It requires skilled piloting to execute successfully.

If the blades stop spinning on a helicopter while it is in the sky, the helicopter will enter a state known as autorotation. The helicopter will start to descend as the unpowered rotor blades rotate due to the upward flow of air. The pilot must carefully manage the descent and attempt to safely land the helicopter.

When an object falls in the air, the air resistance opposing its motion increases as its speed rises, so reducing its acceleration. Eventually air resistance acting upwards equals the weight of the object acting downwards. The resultant force on the object is then zero since the two opposing forces balance. The object falls at a constant velocity, called its terminal velocity, whose value depends on the size, shape and weight of the object.

This is just like Newton's laws, an object will accelerate if the forces acting upon it are unbalanced; and further, the amount of acceleration is directly proportional to the amount of net force (unbalanced force) acting upon it. Falling objects initially accelerate (gain speed) because there is no force big enough to balance the downward force of gravity. Yet as an object gains speed, it encounters an increasing amount of upward air resistance force. In fact, objects will continue to accelerate (gain speed).

Or summat like that...

Helicopters typically use aviation fuel, such as jet fuel, to power their engines, which in turn generate the energy needed to lift off and operate the helicopter during flight. Some helicopters may also use alternative power sources, such as electricity or hydrogen fuel cells, for more sustainable operations.

Helicopters generate static electricity due to the friction between the rotor blades and the surrounding air. This friction causes a build-up of electric charge on the blades, which can discharge as a spark when the helicopter lands or when personnel come in contact with it. Grounding systems are used to prevent static electricity build-up on helicopters.

The thing that spins at the top of a helicopter is called the rotor blade. It provides the lift necessary for the helicopter to take off and stay in flight. The rotor blades are attached to the main rotor mast and are powered by the engine.

The circumference of a helicopter propeller can vary depending on the size and type of helicopter. Generally, the circumference of a helicopter propeller can range from a few feet to several feet in length.

The amount of torque required by a tail rotor depends on factors such as the size and weight of the helicopter, the speed at which it's flying, and external forces like wind. Generally, tail rotors are designed to provide enough torque to counteract the torque produced by the main rotor and maintain stable flight.

The turning rotor of a helicopter creates lift by pushing air downwards, which generates an upward force that allows the helicopter to move upwards. This lift is created due to the rotor blades producing a pressure difference between the top and bottom surfaces as they rotate through the air. The angle of attack of the rotor blades can be adjusted to control the amount of lift produced and therefore the upward movement of the helicopter.

Helicopter blades spin due to the engine providing power to the rotor assembly, which causes the blades to create lift and generate thrust. The rotation of the blades also allows the helicopter to maneuver and change direction in flight.

Some helicopters feature a second rotor underneath the first rotor that counters the force applied to the body of the helicopter by applying thrust in the opposite direction of the main rotor. This stops the helicopter from spinning around. Others, instead of a second rotor underneath the first rotor have a back rotor that essentially does the same thing, which is provide a equal force to the first rotor preventing the helicopter from spinning =0

Helicopters hover by using their main rotor to generate lift, which counteracts the force of gravity pulling the helicopter down. By adjusting the pitch angle of the main rotor blades, the pilot can control the amount of lift produced to maintain a steady hover. Additionally, helicopters can adjust their tail rotor to counteract the torque created by the main rotor rotation, allowing for stable hovering.

Two things keep a helicopter flying, and another keeps it flying straight.

To take off:

1) The blades are shaped like the wings of an airplane and create a difference in pressure (high underneath the wing, low above). This difference in pressure "pushes" the helicopter upwards (lift). But because of gravity, however, there might not be enough lift to take off from the ground.

2) In order to take off, the blades must rotate at supersonic speeds (to be stronger than gravity's push downwards), this make it possible to gain altitude.

To "Fly:"

1) A helicopter's blades in air act like a boat's propeller in water. If the blades rotate at an angle, it will start moving. To make the helicopter hover, the blades must be perfectly straight up. At the same time, the rotating blades make the helicopter itself rotate the other way (about the axis of rotation).

In a GPS, the helicopter would not be going anywhere like this (with no angle on the blades), but the Direction at which it is looking will be changing in circles

2) Helicopters need a way to fix this crazy-out-of-control spinning. They can use a tail rotor for this, but they can also use a "twin" set of blades that rotate in opposite directions (counter-rotating blades).

With the addition of counter-spinning blades, now the GPS will be pointing at 1 direction.

in summary:

1) By keeping the blades rotating fast enough to be lifting with the same force as gravity is pushing down, the altitude is kept the same.

2) By keeping the Blades from spinning at an angle, the Helicopter does not move to the sides.

3) By using a counter-rotating blades set, the helicopter is able to keep looking at one direction.

with these 3 things, Helicopter are able to hover in air, and their GPS can be kept and a fixed height, at fixed position on a map, and at a fixed direction.

Helicopter flight involves principles of aerodynamics, including lift and drag. The main science concepts at play are Bernoulli's principle and Newton's third law of motion. Bernoulli's principle explains how differences in air pressure above and below the rotor blades create lift, while Newton's third law states that for every action (downward force of the blades), there is an equal and opposite reaction (upward force of the helicopter).

Helicopters have a tail rotor that counteracts the torque created by the main rotor, ensuring the helicopter remains balanced. The pilot can also adjust the pitch of the rotor blades to control lift and maintain balance. Additionally, modern helicopters are designed with sophisticated control systems that help maintain stability in flight.

The length of the rotor blades will affect the paper spinner's flight by influencing the lift generated. Longer blades can produce more lift due to a larger surface area, allowing the spinner to stay in the air for longer periods. Shorter blades may not generate enough lift, causing the spinner to fall more quickly.

No, helicopters are aircraft that generate lift through the rotation of their rotor blades. Energy transformations involve converting one form of energy into another, such as mechanical energy into electrical energy.

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.

During takeoff, the helicopter blade applies lift by generating upward airflow which creates a pressure difference between the top and bottom of the blade. This pressure difference causes the blade to move upward, lifting the helicopter off the ground. The angle of attack and rotation speed of the blades also play a significant role in generating lift for takeoff.

The small rotor on the tail, called the tail rotor, counteracts the torque produced by the main rotor of the helicopter. Without the tail rotor, the helicopter would spin uncontrollably in the opposite direction of the main rotor. The tail rotor helps maintain the helicopter's balance and heading.

Drag on a helicopter can be reduced by streamlining the body and rotor blades, ensuring smooth airflow over the surfaces. Another way is to use a more powerful engine to generate more lift with less drag. Additionally, adjusting the pitch of the rotor blades to the most efficient angle helps in reducing drag.

"For every action there is an opposite and equal reaction." For the helicopter to make the blade move in one direction, the blade will try to make the helicopter move in the opposite direction.

Since the blade tries to make the helicopter spin, something is needed to keep the helicopter from spinning. So the manufacturer puts a tail rotor on the helicopter.

The back rotor of the helicopter counters the force applied to the body of the helicopter by the main rotor by applying thrust in the same direction as the main rotor. The force from the main rotor is applied in the opposite direction the main rotor is spinning. So say the force the main rotor was exerting on the body of the helicopter was causing the tail to move left then the back rotor would be designed to apply an equal force pushing the tail right to keep it from spinning.

If the back rotor of a helicopter malfunctioned it would begin to spin.