What is helicopter rotor disc?
What is helicopter rotor disc?
Definition of rotor disk : the plane circular area swept through by the blades of a helicopter rotor.
What is a helicopter blade called?
A helicopter main rotor or rotor system is the combination of several rotary wings (rotor blades) with a control system, that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight.
What is disc loading in helicopter?
Disc loading of a hovering helicopter is the ratio of its weight to the total main rotor disc area. It is determined by dividing the total helicopter weight by the rotor disc area, which is the area swept by the blades of a rotor.
How much does a helicopter rotor blade cost?
The blades have an 18,000 hour service life with overhauls required every 2,800 hours. The list price for the blades is $79,500, sold exclusively through Aeronautical Accessories. Van Horn Aviation is also developing 206L composite main rotor blades, projected to receive an STC in 2017.
What is the RPM of helicopter rotor?
Helicopters also make air move over airfoils to generate lift, but instead of having their airfoils in a single fixed wing, they have them built into their rotor blades, which spin around at high speed (typically about 400–500 RPM on a small helicopter or about 225 RPM on a huge Chinook, with the speed depending on the …
How do helicopter rotors work?
Unlike airplanes, helicopters feature spinning wings called blades or rotors on top. As a helicopter’s blades spin, they create a force called lift that allows the helicopter to rise into the air. A helicopter’s rotors perform the same function as an airplane’s wings.
What is the back propeller on a helicopter called?
tail rotor
The tail rotor is a smaller rotor mounted vertically or near-vertically at the tail of a traditional single-rotor helicopter, where it rotates to generate a propeller-like horizontal thrust in the same direction as the main rotor’s rotation.
What is blade loading?
Definition of blade loading : the gross weight of a rotary-wing aircraft divided by the total area of the rotor blades.
What is propeller loading?
The. propeller load curve is a graph which shows the relationship between the RPM of a fixed- pitched propeller and the power required to drive it at a given speed. The power absorbed. by the fixed-pitched propeller is proportional to the cube of the its RPM.
How heavy is a helicopter blade?
The weight of a helicopter’s blades depends on its type and model, but generally speaking, a helicopter’s blades weigh between 900 lbs/ 40-226 kg/ 0.04-0.226 tonnes.