What is the difference between a helicopter rotor and propeller?
Propeller A typical aircraft propellor cuts through the air much like a screw and provides thrust to the aircraft. Many of the modern airplanes have propellors which are variable pitch and they change pitch so that it can increase the blade angle to grab more air or decrease the angle to grab less. When the pitch is changed by the pilot, both (or all 3 or 4) blades change pitch at the same time and the same angle. Helicopter Main Rotor The main rotor blades of a helicopter provides lift and thrust for forward motion. To do this, the rotor controls input a pitch control to the Blade that is moving to the Aft and decreases pitch to the blade moving forward or vice versa. Therefore, unlike the typical airplane propellor, the helicopter blades do not have the same pitch ange. One result of this is that the loads on the blade attachments (or grips) and the Mast have higher bending loads and torque loads and the loads are not symmetrical as it would be with regular propellor blades.
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Difference in Helicopters A highway patrol is a statewide department while a police department is generally a local or city police department. Police helicopters are generally going to patrol within there city limits (although many provide mutual aid to neighboring cities who do not have a helicopt…er), while highway patrol helicopters are going to patrol a much larger area, both within incorporated cities (freeways) and in unincorporated areas. Some state highway patrol departments fall under the "Department of Public Safety" such as in Arizona or Texas. Their state helicopters therefore are referred to as an "Arizona DPS Helicopter" or a "Texas DPS Helicopter." In states such as Maryland the state patrol helicopter falls under the State Police, and is referred to as the "Maryland State Police Helicopter." The roles of both highway patrol helicopters and police helicopters can vary widely. Also remember that most state highway patrol agencies also own and use fixed wing aircraft which are often more suitable for traffic enforcement. Fixed wing aircraft can generally stay in the air longer, and are a more stable platform for traffic enforcement. Thus, a state highway patrol helicopter is for the most part going to carry out the same function as a police, or a sheriff's department helicopter. In the State of California for example, a California Highway Patrol helicopter will assist other agencies with routine law enforcement calls such as stolen vehicles, vehicle pursuits, foot pursuits, burglaries, armed suspicious persons, etc. Many California Highway Patrol helicopters are also equipped to carry out rescues, and have been involved in many rescues of lost or injured hikers, etc. In many rural areas, both in California and throughout the country, very often the state police, or highway patrol is the only law enforcement helicopter in the region. Regarding equipment, most modern helicopters whether they are local police or highway patrol are going to be outfitted with similar technologies. Generally this includes a suite of police radios for talking with various police and fire agencies, a spot light, P.A. system, and a heat sensing camera (FLIR). Most law enforcement helicopters are jet helicopters or more accurately jet turbine helicopters. There are a few smaller police agencies that use piston powered helicopters such as the R-44 or the Schweizer 300. You can learn more about police helicopters at www.policehelicopterpilot.com (MORE)
Answer . A propeller is completely external and is the main source of propulsion for a airplane with a piston or turbojet engine. A turbofan is more enclosed and provides some propulsion along with also cooling the jet engine that is the main source of propulsion.
ANSWER: . They are eliptical in shape with the leading edge having an airfoil shape, meaning curved across the top to create lift. The rear side of the blade is longer and narrower allowing the air to pass over it easier. It looks like a cross section of a airplane's wing for the full length of t…he blade. (MORE)
Both use the pressure difference caused by air moving over the wings at different speeds to generate lift; a plane by moving those wings in the direction of travel, a helicopter by spinning the "wings" around at high speed. This requies that the plane be in constant forward motion in order for the… wings to make lift. Thus airplanes must roll along the runaway to take-off. A helicopter cant take off at zero forward speed and hover at zero forward speed. The helicopter can land and take off vertically. Thus, they are good for landing in unimproved spots such as done by air ambulances. (MORE)
Answer . 1957 by Boelkow called the Bo-102. It had a single bladed main rotor and a single bladed tail rotor. For more go to http://www.aviastar.org/helicopters_eng/bo-102.php. Answer . in 1957 by Boelkow called the Bo-102 it had a single main and tail rotor. For more go here http://www.avias…tar.org/helicopters_eng/bo-102.php (MORE)
The main rotor produces lift by re-directing the flow of air downward. Due to the torque created from spinning the main rotor, with just the main rotor the helicopter's fuselage (body) would rotate the opposite way until it reached a speed which was equal and opposite the torque/resistance. The ta…il rotor counteracts the torque on the main rotor by creating a similar re-direction of air. Therefore torque turns the aircraft one way and the tail rotors thrust turns it the other. To turn the opposite way as the blades rotate you simpily remove the tail rotor thrust. All helicopters need some means of generating this counter-force. There is a "Notar" (No Tail Rotor) which uses the Coanda effect to produce the counter-force. (MORE)
The "propeller" of a helicoper is actually a set of rotor blades. They cost anywhere from a few thousand to a few million dollars each.
Solid fueled missiles are just that. They are propelled by a solid fuel. For an everyday example of that, pick up an Estes rocket kit from Michael's craft store and look at it's propellant.. Liquid propelled missiles us a liquid propellant, like your car. Liquid propellants also require a second ox…idiser, either air or stored oxidiser to burn, solid propellants generally have the oxidizer mixed in. Solid fueled rockets typically can be handled rougher as they are more stable than their liquid counterparts. Hope that answers your question. (MORE)
A Jet plane has no propellers. (Actually, there are 'prop-jets' on which propellers are powered by jet engines.) There is basically no difference in the airplane. The engines are different and sometimes the design of the wings or fuselage is different to allow for the different type engines. For …example, early single-engine jets had their engines embedded within the fuselage so the air flow entered the nose or just under the wings and exited the tail after being ignited. Another difference is that Jet aircraft usually fly faster than propellor. The wings on propellor a/c are usually straight whereas the wings of jets are slanted aft. This improves aerodynamics when the jet approaches the speed of sound. (MORE)
An impeller is a rotor inside a pump through which the liquid flows to create a pressure gradient. A propeller is used to propel a vessel. In pump impeller liquid moves i.e. pump is stationary. In a vessel propeller the vessel moves through a liquid or gas! @ please iwant to know the physical mean…ing of NPSH Net Positive Suction Head (MORE)
The only one difference in b/w compressor and pump rotor is impeller shroud width.Fluid is incompressible so impeller shroud width is not change and gas is compressible so impellers are tends to thin in width to the discharge side.
When helicopters main rotors are turning, it is the natural reaction of the fuselage of the helicopter to spin the other way, this is known as torque, a tail rotor spinning counteracts this force by pushing the other way, The rotor pedals change the pitch of the blades on the tail rotor, if the pilo…t wants to spin left, he compresses the left anti-torque (yaw) pedal, and the blades will alter their pitch to offer less resistance, making the fuselage spin left, if he wants to turn right, then the pilot will press the right pedal,this will make the blades on the tail rotor change pitch to make even more resistance...this overpowers the torque force and makes the helicopter turn right.. hope this helps :) (MORE)
An engine usually more than one which is connected to a main driveshaft then that is connected to a C-box or Combining gear box which connects to a transmission which turns the rotors.
Main rotor and tail rotor.. The main rotor is on top of the helicopter consisting of two or more blades, and the tail rotor is at the back of the helicopter, which also consists of two or more blades.
Helicopters are "rotary wing" aircraft- their wings are the rotor blades. Instead of deriving lift from moving air over the fixed wings of an airplane, a helicopter derives lift by moving the wings through the air.
If you mean rotor blades, theoretically, only one (provided it is counterbalanced and moves fast enough). But you'll typically see two or more. Helicopters use more than one because it requires less rotor speed to get the same lift, and it also runs a lower risk of failure in the mechanical systems.… Many rotocraft use four or five, and some up to six or seven blades.. There are a few helicopters that use two main rotors, and they are counter rotating so that their torque cancels and a tail rotor is not necessary. But the mechanical complexity of these main rotor systems impinges on mechanical reliability. (MORE)
The rotor blades on a helicopter work the same way as wings on a fixed wing aircraft. The air passing faster over the top of the airfoil generates lift. Helicopter rotors spin so that the lift is generated without having to have forward airspeed like a fixed wing aircraft.
A helicopter gets its lift from the powerplant turning the main rotor. An autogyro's main rotor is unpowered and simply windmills when the aircraft is propelled forward by the propeller. Since this is the case it is not possible for an autogyro to hover for more than a few seconds. Autogyros can tak…eoff and land in very short distances though, and are capable of very low speeds. Whereas helicopters are very sophisticated machines and can be very difficult to operate autogyros are much simpler mechanically and are very easy to control as they are inherently stable by design. (MORE)
its designed different that's like asking whats the difference between a f-15 and a f-16 two different aircraft
On most helicopters, the main rotor turns in a clockwise motion. If you were sitting in the cockpit looking out the front, the rotor blades would swing from the left side 'round the front to the right side. French made helicopters are the exception, they rotate the opposite direction, which can c…ause some confusion for the pilot if they are not prepared. (MORE)
A jet plane uses a jet engine's thrust for propulsion. A propeller is a set of blades somewhat like a big fan that blows air to the back of the plane for thrust instead of using a jet engine for the thrust to move the plane forward.
Both are tracked vehicles. An assault gun is usually a turret less vehicle, mounting a (usually) high velocity gun used in a direct fire mode, used for attacking an enemy position. A self propelled gun is usually an artillery piece (indirect fire), and is tracked to allow self propulsion.
The Shuttle uses both. The outer rockets on the main body are aluminum oxide. Once lit you are on. In the big container sits a lot of separated liquid Oxygen and liquid Hydrogen. When mixed at the output nozzles, a steerable, controllable jet of very hot water is let go. The difference being solid r…ockets go on then off. The liquid ones are controllable. (MORE)
Stator is part of rotating mechanical device thats sorrounds the rotor to rotate it through the induced magnetic field while the Rotor, is the one who is rotated by produced magnetic field in the stator,.
A tank can fire on the move a spg must stop and fire. There are more ways to define this but this is the simplest way to understand it ___ I'ts a good way to answer, but the SPG don't need really to stop to fire, but stand and fire is mostly common because the gun recoil can easily injure or… kill who is firing the SPG... So, what is the difference between one SPG and one Tank? First: Tanks need to be very agile or very armored, and the SPG's just just need to move, many times regardless of the speed or the armor, so the most of the SPG's don't have a tower and the armor is less than 60mm... Second: Tanks are mobile Cannons, and SPG's, mobile Howitzers. A Cannon is a device capable of firing projectiles at enormous speeds, that sometimes don't need a explosive charge ( at least against other tanks ). A Howitzer is a device, that unlike the Cannons, is centered in the explosive charge, having a minimal propeller charge, that will most of the times help instead of stuck, because SPG's most of the times will fire in an arc trajectory, and in the direction of the infantry, not of other mobile steel pieces. So, for don't have confusion, Howitzers are degree-ed artillery with enormous firepower and Cannons are horizontal and high speed ones. Tanks and SPG's are just mobile counterparts of both, with some other differences. Source: World of Tanks Wiki. (MORE)
the answer is a helicopter flys high and a snail it stays on the ground also helicopters go fast and snails go slow and something a like they both move in some type of way.
That's a very difficult question as rotors were developed by many people from as far back as the 1800's. - Possibly the first successful rotor as we know it today was developed by Juan de la Cierva in 1923. His rotor was widely used in 'gyroplanes' which were aircraft with minimal wings, and in …which the rotor turned freely to provide lift, but was not powered. These aircraft were powered by an engine pulling it forward, and this motion turned the rotor. The first really successful powered rotor was developed by Igor Sikorsky during the early 1940's. (MORE)
The difference between the two turbines is that in the pitch of the blades can be changed in the Kaplan in order to improve the results of the process, unlike the Propeller turbine, which is not capable of that.
A propeller is in the shape of a wing and so produces thrust similar to how a wing works. The layout of the propellers are in a way so that this force is directed forward. A jet however works buy forcing air backwards at large forces. Jet engines use Newtons third law of motion (every action has an …equal and opposite reaction) to move the aircraft forward. Forcing hot gas backwards causes and equal force 'forwards' on the aircraft (MORE)
sometimes, but they need to be on both sides or else the helicopter will lose its balance and crash! it is not beneficial if you put the lights on the propellers because they will move so fast you can't see them...
A helicopter's rotors are all powered, and a helicopter is capable of hovering. A gyrocopter is pushed forward by a powered propeller. However, the main rotor atop isn't powered by the motor - it's the wind which makes it spin, and that acts as the gyrocopter's wings.
What engine is in widespread use as the source of power for helicopters it is linked by gears to the helicopter's rotors in a manner similar to the turbine-driven propellers on airplanes?
They're powered either by a gas turbine engine (known as a turboshaft), or some helicopters (such as the Robinson helicopters) still use internal combustion engines.
Axial fans are divided into three groups: propeller, tubeaxial and vaneaxial. Hence, every propeller fan is an axial fan but the opposite is incorrect.
Those are the helicopters designed by Aerospatiale (which was later merged into Eurocopter). IIRC, the first model to use it was the Dauphin.
Propellors are on airplanes. Helicopters call them rotors. The small rotor on the back of the helicopter is used to counteract the torque created from the engine driving the main rotors.
Fixed wing aircraft use propellers for thrust only. A helicopter uses it's rotors for lift, thrust, and directional control. The tail rotor uses blade pitch to control yaw.
There are two main types of rockets: liquid-fuel and solid-fuel. Liquid-fuel rockets consist of a fuel and oxygen (or other oxidizer) in liquid state. They are combined in a combustion chamber and ignited. The fuel flow to the engine can be controlled, the amount of thrust produced can be regulated …and the engine can be turned off or on as needed. Solid-fuel rockets consist of a fuel and oxidizer that are pre-mixed in a solid form. Once the solid fuel is ignited, the resulting thrust cannot be regulated or turned off. This fuel system is simpler, safer, and cheaper-but less efficient-than that of a liquid-fuel rocket. (MORE)
Commercial helicopters are genrally used for public air trvel for shorter distances. Flown by a commercial pilot who has gone through hundreds of hours of flight, medical and engine failur traning.
For the USAF/USA, it depends on aircraft size/type, rotor disc diameter, whether or not the helicopter is equipped with wheels or skids. See AFH 32-1084 and/or UFC 3-260-01 for specifics.
Helicopter can have 2 blade, 4 Blade, 6 Blade, 8 Blades. Selection of this Blades depends up on the Power Rating. For a small 2 Ton H/C, it can have 2 Blades. 5 Ton H/C can have 4 Blades etc..
The rear,small propeller is used for steering and attitude. The main rotor gives lift and forward movement.
A helicopter flies using a rotor and can hover whereas an aeroplane has wings and aeroplanes can generally hold a bigger amount of people.
To counteract the torque of the main rotor and to provide yaw movement along the z axis.
That is to stabilise the inherent spin of the main rotor and to steer the machine.
rooter is start of (R)and armature is start of (a) ...........Written By................................................ ...........Prof....Guffar sb (Snath Jesoriya)IET
The words 'rotor' and 'propeller' are nouns , singular, common, concrete nouns; word for things.
Generally speaking there are 4 propellers. Two of them are crossedover each other that form the main propellers, and the other twoare at the rear.
The rotor is like the engine to the propeller. A propeller is thefan like blades on the top that spin to make the helicopter fly.
Can you build a plane with normal propellers and with a helicopter rotor blade together and use it lift of the ground and then fly like a normal plane?
What you're talking about really isn't feasible. The closest thingyou'll find to it is the V-22 Osprey, which uses counter-rotatingpropellers, and can only take off and land vertically.
A conventional airplane has wings that are rigidly attached to the body of the aircraft. The wings along with the body of the airplane move forward thru the air at speed, creating lift, which makes the airplane rise. With helicopters, the wings (rotors) are mounted on a shaft turned by the engine. …The rotor turns, moving the rotor through the air, creating lift. The body of the helicopter does not have to move in any one direction. This means that (within the limits of power) a helicopter can fly left/ right, forwards/ backwards, or straight up/ down. (MORE)