An airfoil is
any surface
, such as an airplane wing or a helicopter rotor
What is a helicopter airfoil?
An airfoil is
any surface producing more lift than drag when passing through the air at a suitable angle
. Airfoils are most often associated with production of lift. Airfoils are also used for stability (fin), control (elevator), and thrust or propulsion (propeller or rotor).
What airfoil do most helicopters use?
Rotor blades on helicopters are airfoils. The wing of an airplane is normally an unsymmetrical airfoil, that is, the top surface has more curvature than the lower surface. The main rotor blades of most helicopters are
symmetrical airfoils
; that is, having the same curvature on both upper and lower surfaces (figure 1).
What airfoil provides lift in a helicopter?
An airfoil can be defined as ‘any shape designed to obtain a useful reaction from the air through which it moves’. In helicopters,
the rotors
are the airfoils which provide lift and propulsion.
Is a helicopter blade a wing?
A helicopter’s
rotor blades are wings and create lift
. An airplane must fly fast to move enough air over its wings to provide lift. A helicopter moves air over its rotor by spinning its blades.
How high can a helicopter fly?
| Helicopter Name First Flight Highest Altitude Records | Mil Mi-8 1961 30,000 feet | Boeing CH-47 Chinook 1961 >18000 feet | AgustaWestland AW109 1971 13,800 feet | Sikorsky H-60 Black Hawk 1974 19,151 feet |
|---|
Why are helicopter blades curved?
blade” is curved (wrapped) around a cylinder. What this does is give the airfoil some camber (an aeronautical term used to describe the arched shape of the blade thickness). By creating camber (as seen in Figure 4), the
airfoil will generate a lift force in one direction as it moves through the air
.
Why does a helicopter stay in the air?
A
helicopter remains stationary by balancing the external forces
. There are no horizontal forces, as the helicopter is not moving left or right, so there is no drag or horizontal thrust. The blades generate a vertical lift, and when this is exactly balanced with the force of gravity, the helicopter remains stationary.
Why does helicopter have huge rotors?
Unlike the small diameter fans used in turbofan jet engines, the main rotor on a helicopter has a
large diameter that lets it accelerate a large volume of air
. This permits a lower downwash velocity for a given amount of thrust.
What is the bottom part of a helicopter called?
The tail rotor
is found at the tail end of a helicopter and its primary function is to counteract the torque effect by the main rotor
What actor died in a helicopter crash?
| Vic Morrow | Resting place Hillside Memorial Park Culver City, California | Other names Victor Morrow | Occupation Actor, director | Years active 1955–1982 |
|---|
Can a helicopter fly without a tail rotor?
One significant advancement in the last decade has been the no-tail rotor, or NOTAR, helicopter. … As you now know,
vertical-lift flight is impossible without a tail rotor
to counteract the torque produced by the main rotor.
Can helicopters fly upside down?
Flying a helicopter upside down is rather different from flipping over an aerobatic airplane, whose wings can generate lift whichever way they’re pointed.
Helicopters can only can only send lift-generating air in one direction
. Turn it over, and it’s going to accelerate you toward the ground.
What happens if a helicopter flies too high?
What Happens If a Helicopter Flies Too High?
As the helicopter ascends, the air begins to thin
. With thinner air, the main rotor
How far can a helicopter fly in 2 hours?
A good helicopter will be quick, let you take as many people as you want, and doesn’t require stopping every half an hour to refuel.” “With the mid-range H125 you can get a range of about two and a half hours at about 135 knots, which will get you
about 300-350 miles
without refuelling.
Why do aircraft fly at 35000 feet?
A balance between operating costs and fuel efficiency is achieved
somewhere around 35,000 feet, which is why commercial airplanes usually fly at that altitude. Most commercial airplanes cruise at an altitude of nearly 35,000 feet—around 6.62 miles (10,600 meters) in the air!
