NOTAR provides anti-torque similar to the way a wing develops lift through the use of the Coandă effect on the tail boom.
Some helicopters use other anti-torque controls instead of the tail rotor, such as the ducted fan (called Fenestron or FANTAIL) and NOTAR. The tail rotor pushes or pulls against the tail to counter the torque effect, and this has become the most common configuration for helicopter design, usually at the end of a tail boom. 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".
This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. This Easy Chopper 2 has an easily interchangeable blade assembly that allows you to create multiple cuts in different sizes using one product.A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. Built to last for years, this unit is made from exceptionally durable, lightweight aluminum while its (4) non-skid feet offer reliable stability. To reduce operator fatigue while ensuring safety, this NSF listed chopper has a comfortable, weighted handle and guide rods to provide consistent application of pressure. Thanks to its high-tension stainless steel blades, this quality product is super sharp and taut to produce clean cuts with one stroke. Designed with a large 4-1/4" square cutting area, this unit takes on large onions and other big vegetables. Product Details for Nemco Easy Chopper 2 3/8" CutĪn indispensable addition to any commercial kitchen, the Nemco 56500-2 Easy Chopper 2 3/8" Cut quickly and efficiently chops, slices, and dices fresh produce.
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