# Parts Of Helicopter And Its Functions Pdf

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A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally-spinning rotors. This allows the helicopter to take off and land vertically, to hover , and to fly forward, backward and laterally.

Helicopters come in many sizes and shapes, but most share the same major components. These components include a cabin where the payload and crew are carried; an airframe, which houses the various components, or where components are attached; a powerplant or engine; and a transmission, which, among other things, takes the power from the engine and transmits it to the main rotor, which provides the aerodynamic forces that make the helicopter fly. Then, to keep the helicopter from turning due to torque, there must be some type of antitorque system. Finally there is the landing gear, which could be skids, wheels, skis, or floats.

## 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. At the end of the chapter, the main factors that determine the helicopter performances are mentioned.

## Rotorcraft Fundamentals/Introduction to the 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.

## Helicopter Flight Physics

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.

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.

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 horizontal thrust in the same direction as the main rotor 's rotation. The tail rotor's position and distance from the helicopter's center of mass allow it to develop enough thrust leverage to counter the reactional torque exerted on the fuselage by the spinning of the main rotor. Without the tail rotor or other anti-torque mechansims e.

Беккер чувствовал, как ее глаза буквально впиваются в. Он решил сменить тактику: - Я из специальной группы, занимающейся туристами. Отдайте кольцо, или мне придется отвести вас в участок и… - И что? - спросила она, подняв брови в притворном ужасе. Беккер замолчал. Он опять перегнул палку.

Мне нужно все, что было у Танкадо при. Все.

И что. - Какое вам дело? - холодно произнес американец.  - Когда мистер Беккер найдет ключ, он будет вознагражден сполна. ГЛАВА 22 Дэвид Беккер быстро подошел к койке и посмотрел на спящего старика.

Она подняла голову. Глаза ее были полны слез. - Прости меня, Дэвид, - прошептала.  - Я… я не могу.

Ясно, что ему не удастся влиться в это море, которое раздавит его, как утлую лодчонку. Рядом с ним кого-то рвало. Хорошенькая картинка.

Он немедленно включил монитор и повернулся к графику дежурств на стене. - Чья смена? - громко спросил он, пробегая глазами список. Согласно расписанию, в полночь должен был заступить на двойную смену новый сотрудник по имени Зейденберг. Чатрукьян еще раз обвел глазами пустую лабораторию и нахмурился.

- Это вовсе не трюк. Да я вообще слова ему не сказал о деньгах. Я попросил оказать мне личную услугу. И он согласился поехать. - Конечно, согласился.

Я разрушу все ваши планы. Вы близки к осуществлению своей заветной мечты - до этого остается всего несколько часов. Управлять всей информацией в мире.

У нас осталось всего восемь минут. Мы ищем число, а не произвольный набор букв. - Четыре умножить на шестнадцать, - спокойно сказал Дэвид.

Компьютер зафиксировал ее прибытие. Хотя Сьюзан практически не покидала шифровалку в последние три года, она не переставала восхищаться этим сооружением. Главное помещение представляло собой громадную округлую камеру высотой в пять этажей.

Стратмор задумался. - Должно быть, где-то замыкание.

## Force and laws of motion class 9 sample papers pdf

The rotor system is the rotating part of a helicopter which generates lift. The rotor (proportional to its own lifting force) changes as it rotates with the rotor, hence.

aircraft, because the helicopter derives its source of lift from the rotor blades areas where fixed-wing aircraft are not able to take off or land. [Figures and.

This handbook is available for download, in PDF format, from northcornwallnt.org This handbook is aircraft because the helicopter derives its source of lift from the rotor blades rotating The helicopter rotor system is the rotating part of a helicopter that [Figure ] The arrangement allows the helicopter to function without the.

the level of design for its parts and their connections. For parts, connecting pieces from the various of its functions mentioned above and are determined by.

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