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See Wikipedia for how the plane gets lift. Look up 'Aerofoil How it works' . A propellor on a plane produces thrust exactly the same way as a ship propellor. When propellors rotate in either water or air, they have to push the air or water out of their way as they try to cut through it . The water or air offer a lot of resistance and so the propellor has to thrust very hard against this fluid. It is very similar to you pushing against a wall to move away from the wall. The only difference is that the water or the air acts as the wall to push against. If the propellor is going at high speed it has to push much harder and the fluid stays where it wants to be, and the propellor moves through the fluid at higher speed . It is really much the same as a corkscrew winding it's way through a cork and pulling the cork forward. Air and water are both fluids and they behave the same way as each other.
The prevailing theory is that propeller works the same way that a wing works...because they are both airfoils. They both have camber (or curves) on one side and are flat (or less cambered) on the other side. By speeding up the flow of air over the curved surface of the airfoil, the pressure is reduced (Bernoulli) and the pressure differential between the two sides "pushes" the airfoil in the direction of the lower pressure. See the link for more information.
What else can I help you with?
What is the purpose of a propeller?
A propeller is a type of fan that transmits power by converting rotational motion into thrust. A pressure difference is produced between the forward and rear surfaces of the airfoil-shaped blade, and a fluid (such as air or water) is accelerated behind the blade. Propeller dynamics can be modeled by both Bernoulli's principle and Newton's third law.So its mainly used to generate thrust and fly in the air. . .Sahil Kapoor.
Can a propeller work in space?
No, a propeller requires a medium, such as air or water, to push against in order to generate thrust. In the vacuum of space, there is no medium for the propeller to work against, so it would not be able to generate thrust or propel a spacecraft.
How does a propeller produce thrust?
A propeller is like a spinning wing. The airfoil shaped blades pull an airplane forward just as an airplane's wings lift it upward. The amount of thrust created by a propeller depends on how fast and at what angle its blades cut through the air. The propeller is generally powered by a combustion engine which fires pistons and turns the propeller.
How do propellers work in reverse thrust?
The propeller blades are angled in the opposite direction, sort of like an airplane flying on its back. Of course, the propeller's blade twist from hub to tip is inappropriate, and the camber of the airfoil is wrong when thrust is reversing, but efficiency of the propeller is not of paramount importance during that phase of operation.
How propellers work in engineering?
The physics concepts of a propeller is that a props generate the thrust force that pulls a machine into the air. It also has aerodynamic properties that spins the propeller.?æ?æ
What is aircraft propeller?
A propeller is the object on the aircraft that rotates to produce thrust almost like a fan makes wind... it aims the wind behind it and pushes the aircraft forward
What part of a plane and of a jet are used to create thrust?
The motors or engines. The propeller(s) generate forward thrust on piston or turbo-prop aircraft, and on jet aircraft, thrust is created both by combustion exhaust and by bypass air from the fan(s).
How fast does a propeller have to spin to lift a man off the ground?
That's a difficult question to answer. First, in the sense that a propeller is really an airfoil, it does, in fact, generate lift. However, the concept of lift with respect to aircraft, generally refers to the vertical lifting force, and this is produced by the airfoils (wings) and not the propeller. The propeller produces forward thrust which, when sufficient, generates the speed necessary for the wings to produce lift. So, back to the question: A propeller needs to turn fast enough to produce enough forward speed for the airfoils to produce sufficient lift for the aircraft to rise. The RPM necessary to do this depends on the size and number of blades, the power of the engine, the weight of the aircraft, and a number of other factors such as airport elevation, etc. Sorry this doesn't exactly answer the question, but hopefully it will help you craft a more specific question that can be answered more accurately.
How does a propeller vehicle use air resistance?
A propeller vehicle uses air resistance to generate forward thrust. As the propeller spins, it creates a pressure difference between the front and back of the propeller, causing the vehicle to move forward. The air resistance acts against the motion of the propeller, helping to propel the vehicle forward.
What provides thrust for airplanes?
An engine driving a propeller or a turbine causes thrust.
How does a propeller generate thrust?
Technically it doesn't produce thrust, it produces lift the same as a wing - each blade of the propeller is a wing just like a helicopter blade so the plane is flying or lifting in a forward direction - the backwash of a prop is produced by the air being redirected by the airfoil of the prop. Lift (or forward motion) is created by making the air pressure lower on the front of the propeller blade than the back so the aircraft is actually being pulled / pushed forward by air pressure rather than being pushed by thrust - thrust is created by the forceful ejection of fuel such as from a jet or rocket engine Not understanding why props work is why early ship propellers were so inefficient - before the principal of lift was discovered it used to be thought they worked by creating thrust, and so were designed by trial and error to create as much backwash as possible. But the backwash has little to do with how a prop works. It's one of the problems the Wright brothers had to solve with their first airplane - all props of the time were poorly designed - the brothers correctly realized the prop was a wing and designed their own props as such.
what is airfoils?
an object shaped to produce lift by the bernoulli principle when moving in a fluid
