helicopter parts and functions pdf

Helicopter Parts And Functions Pdf

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Published: 22.04.2021

Helicopters come in many sizes and shapes, but most share the same major components.

A helicopter has four controls: collective pitch control, throttle control, antitorque control, and cyclic pitch control. Raising or lowering the pitch control increases or decreases the pitch angle on all blades by the same amount. An increase in the pitch angle will increase the angle of attack, causing both lift and drag to increase and causing the rpm of the rotor and the engine to decrease. The reverse happens with a decrease in pitch angle. Because it is necessary to keep rotor rpm as constant as possible, the collective pitch control is linked to the throttle to automatically increase power when the pitch lever is raised and decrease it when the pitch lever is lowered.

The Anatomy of a Helicopter

A helicopter is a rotor-controlled aircraft with a complex anatomy. Although a helicopter is smaller than an airplane, the fast-spinning rotors makes it much more difficult to control. Below, you will learn about the key parts to a helicopter ranging from the cockpit all the way through to the tail rotor.

The cockpit of a helicopter is the central control unit, determining all activity of the helicopter. The pilot will sit in the cockpit with a co-pilot; helicopters not requiring 2 pilots can have another person in the front seat. There are four main controls a helicopter pilot must use in flight: cyclic, collective, anti-torque pedals, and throttle. The main rotor is the most important part of the helicopter.

It lets the pilot control which way they turn, change altitude and make lateral movements. The pilot communicates these with controls in the cockpit that are linked to the swash plate assembly. Landing gear comes in different forms but skids and wheels are the most common. Bear paws, floats and pontoons are also fairly common.

Bear paws are attached to the skids and used for helicopters landing off airport on uneven, unstable and soft terrain helping with overall stability. There are two main types of engines: reciprocating engine and turbine engine. Reciprocating engines use one or more pistons to convert pressure into a rotating motion creating power. Turbine engines use a process of pressurized air mixed with fuel to create high-velocity gas to turn the turbine wheels.

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. Helicopters are used for many different reasons and they may be the most versatile vehicle in the world. A helicopter can do it all: hover, land on uneven ground, travel vertically, horizontally and every other direction in between.

From leg-like skids to electric tail rotors, it will be interesting to see how much further the helicopter develops. Cockpit The cockpit of a helicopter is the central control unit, determining all activity of the helicopter.

Main Rotor The main rotor is the most important part of the helicopter. Landing Gear Landing gear comes in different forms but skids and wheels are the most common. Engine There are two main types of engines: reciprocating engine and turbine engine.

Tail Rotor 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. Conclusion Helicopters are used for many different reasons and they may be the most versatile vehicle in the world.

Rotorcraft Fundamentals/Introduction to the Helicopter

If you need any parts not listed below in our current stock of parts, then please follow the Parts request link from the menu on the left to contact us today for price and availability. If you are looking for new or used parts from our existing stock then please use the search function on the right to check availability. Search for a part: GO. AN NUT. H NUT.

Main rotor blade -- The main rotor blade performs the same function as an airplane's wings, providing lift as the blades rotate -- lift being one of the critical aerodynamic forces that keeps aircraft aloft. A pilot can affect lift by changing the rotor's revolutions per minute rpm or its angle of attack, which refers to the angle of the rotary wing in relation to the oncoming wind. Stabilizer -- The stabilizer bar sits above and across the main rotor blade. Its weight and rotation dampen unwanted vibrations in the main rotor, helping to stabilize the craft in all flight conditions. Arthur Young, the gent who designed the Bell 47 helicopter, is credited with inventing the stabilizer bar.

A helicopter is a rotor-controlled aircraft with a complex anatomy. Although a helicopter is smaller than an airplane, the fast-spinning rotors makes it much more difficult to control. Below, you will learn about the key parts to a helicopter ranging from the cockpit all the way through to the tail rotor. The cockpit of a helicopter is the central control unit, determining all activity of the helicopter. The pilot will sit in the cockpit with a co-pilot; helicopters not requiring 2 pilots can have another person in the front seat. There are four main controls a helicopter pilot must use in flight: cyclic, collective, anti-torque pedals, and throttle.


Hub. Mast. Rotor blades. Figure Basic components of the rotor system. Uses. Due to the unique operating characteristics of the helicopter— its ability.


Helicopter Flight Physics

This chapter is dedicated to present the principles that constitute the fundamentals of helicopter flight physics, starting from the basics of the main rotor aerodynamics and of the component parts related to flight control. The chapter opens with a short history of helicopter development, taking the date of 13th November for a reference point; this is the date when the first helicopter flight occurred, having the French man, Paul Cornu, for a pilot. The main constructive solutions for helicopters are presented and the basic equations of fluid mechanics are applied on a helicopter model with one main rotor and tail rotor. Helicopter hovering, vertical flight, and forward flight are approached, too, one by one. Furthermore, the ground effect, autorotation, stability, and helicopter control are focused on.

In recent years, various helicopter manufacturers have been focusing increasingly on the development of new high-speed rotorcraft configurations, one of them being the compound helicopter RACER of Airbus Helicopters AH. However, these new configurations encounter new aeromechanic challenges, in terms of aerodynamic interactions, flight mechanics stability, rotor dynamics or aeroacoustic noise emission, to name only a few.

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Чрезвычайная. В шифровалке. Она не могла себе этого представить. - С-слушаюсь, сэр.  - Она выдержала паузу.  - Постараюсь побыстрее. - А лучше еще быстрее.

У нее был такой вид, словно она только что увидела призрак. - Джабба! - Соши задыхалась.  - Червь… я знаю, на что он запрограммирован! - Она сунула распечатку Джаббе.

Вылил целую бутылку. Хейл включил свой компьютер. - Специально для тебя, дорогая. Он стал ждать, когда его компьютер разогреется, и Сьюзан занервничала. Что, если Хейл захочет взглянуть на включенный монитор ТРАНСТЕКСТА.

Сьюзан перевела дыхание. Энсей Танкадо умер. Вина ляжет на АНБ. - Мы успеем найти его партнера.

1 comments

Naroa M.

The major components of a helicopter are the airframe, fuselage, landing gear, powerplant, There are several variations of the basic three rotor head designs.

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