Contents
What counters the torque from the main rotor of a helicopter?
tail rotor
In a single main rotor helicopter part of the power generated by the powerplant(s) is employed to counteract torque. The most common anti-torque device is a tail rotor, which is designed to compensate the torque produced by the main rotor.
How is helicopter lift force calculated?
The lift formula or equation is CL ½ p V2 S. This formula is used to quantify the factors or components that influence lift production. The factors are coefficient of lift, air density, velocity, and surface area. Not all factors of the equation are equal.
Where does the torque come from in a helicopter?
In tandem rotor and coaxial helicopter designs, the rotors turn in opposite directions to neutralize or eliminate torque effects. In tip-jet helicopters, power originates at the blade tip and equal and opposite reaction is against the air; there is no torque between the rotor and the fuselage.
How much horsepower do you need for a helicopter?
Approximately 12 pounds (maximum) gross weight per horsepower (at the rotor). How much horsepower is required per square foot of main rotor disc area? Approximately 4.5 to 5 square feet of rotor disc area per horsepower. What length main rotor blades do you need to life your homebuilt helicopter?
How to calculate the force of a tail rotor?
On a helicopter, the force of a tail rotor would be best described as thrust. The first step is to measure the diameter of the rotor or propeller and calculate the area in square feet. Area is defined as:
How to calculate the lift of a helicopter?
25 hp, 12′ rotor develops 347 pounds of lift (neglecting loss to tail rotor of 10-15%) 2 hp, 6′ rotor develops 39 pounds of lift (neglecting loss to tail rotor of 10-15%) Using equation one, we calculate power loading (PL) of a 6 foot diameter (72″) disk with 300hp absorbed.