royalbrazerzkidai.blogg.se - Discovery pro quadrotor lands and blinks

The design that Igor Sikorsky settled on for his VS-300 was a smaller tail rotor. Most helicopters have a single main rotor, but torque created by its aerodynamic drag must be countered by an opposed torque. There are three basic types: hingeless, fully articulated, and teetering although some modern rotor systems use a combination of these. Main rotor systems are classified according to how the rotor blades are attached and move relative to the hub. At the top of the mast is the attachment point for the rotor blades called the hub. The mast is a cylindrical metal shaft that extends upwards from the transmission.

The rotor consists of a mast, hub and rotor blades. A rotor system may be mounted horizontally, as main rotors are, providing lift vertically, or it may be mounted vertically, such as a tail rotor, to provide horizontal thrust to counteract torque from the main rotors. The rotor system, or more simply rotor, is the rotating part of a helicopter that generates lift. In the United States military, the common slang is "helo" pronounced with a long "e". English language nicknames for "helicopter" include "chopper", "copter", "heli", and "whirlybird".

For various reasons, the word is often erroneously, from an etymological point of view, analysed by English speakers into heli- and copter, leading to words like helipad and quadcopter. The English word helicopter is adapted from the French word hélicoptère, coined by Gustave Ponton d'Amécourt in 1861, which originates from the Greek helix ( ἕλιξ) "helix, spiral, whirl, convolution" and pteron ( πτερόν) "wing".

3.2 Transition from hover to forward flight.

Quadrotor helicopters ( quadcopters) were pioneered as early as 1907 in France, and along with other types of multicopters have been developed mainly for specialized applications such as drones. However, twin-main rotor helicopters (bicopters), in either tandem or transverse rotors configurations, are sometimes in use due to their greater payload capacity than the monorotor design, and coaxial-rotor, tiltrotor and compound helicopters are also all flying today. unicopter, not to be confused with the single-blade monocopter) has become the most common helicopter configuration. Īlthough most earlier designs used more than one main rotor, the configuration of a single main rotor accompanied by a vertical anti-torque tail rotor (i.e. In 1942, the Sikorsky R-4 became the first helicopter to reach full-scale production. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of STOL (Short TakeOff and Landing) or STOVL (Short TakeOff and Vertical Landing) aircraft cannot perform without runway. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors.