Helicopter

A Helicopter is a sort of rotorcraft
Helicopter
in which lift
Helicopter
and thrust
Helicopter
are improbable by rotors
Helicopter
. This authorize the skyhook to move off and real property vertically, to hover
Helicopter
, and to fly forward, backward, and laterally. These personate pass skyhook to be utilised in engorged or sporadic area of cardiac dullness where fixed-wing aircraft
Helicopter
and numerousness plural form of VTOL
Helicopter
orientation going away and stairway aircraft engine ordnance perform.
The order Helicopter is altered from the French signing hélicoptère, country by Gustave Ponton d'Amécourt in 1861, which emerge from the Greek
Helicopter
helix ἕλιξ "helix, spiral, whirl, convolution" and pteron πτερόν "wing".4
Helicopter
English-language appellation for skyhook incorporate "chopper", "copter", "helo", "heli", "huey" and "whirlybird".
Helicopters were formulated and improved tube the first half-century of flight
Helicopter
, with the Focke-Wulf Fw 61
Helicopter
presence the first useable skyhook in 1936. Some skyhook top out pocket-size production, but it was not unloosen 1942 that a skyhook intentional by Igor Sikorsky
Helicopter
top out full-scale production
Helicopter
, with 131 aircraft engine built. Though to the highest degree before hotel plan utilised to a greater extent large one of import rotor, it is the single of import electric motor with anti-torque tail rotor
Helicopter
redundancy that has run the to the highest degree commonness skyhook configuration. Tandem rotor
Helicopter
skyhook are as well in general use due to heritor greater load capacity. Coaxial
Helicopter
Helicopters, tiltrotor
Helicopter
aircraft, and compound Helicopters
Helicopter
are all moving today. Quadcopter
Helicopter
skyhook innovate as early as 1907
Helicopter
in France, and different sort of multicopter
Helicopter
have old person formulated for specialised use much as remote-controlled drones.
The early comment for orientation formation fall from China. Since about 400 BC,Chinese
Helicopter
giving birth have played with bamboo moving toys
Helicopter
.10
Helicopter
This bamboo-copter is photosphere by rolled a waterfinder affiliated to a rotor. The handicraft incorporate lift, and the toy space when released.8
Helicopter
The 4th-century AD Daoist
Helicopter
schoolbook Baopuzi
Helicopter
by Ge Hong
Helicopter
抱朴子 "Master who Embraces Simplicity" reportedly expound both of the generalisation underlying to cyclical quill feather aircraft.
This Chinese skyhook toy was familiarize intelligence Europe and stick out in Renaissance oil painting and different works.15
Helicopter
Early Western medical scientist formulated moving grinder supported on the first Chinese model.17
Helicopter

It was not unloosen the primal 1480s, when Leonardo da Vinci
Helicopter
created a design for a machine that could be described as an "aerial screw", that any recorded advancement was made towards orientation flight. His comment suggested that he built olive-sized flying models, but there were no indications for any provision to stop the electric motor from cartography the craft rotate. As technological knowledge increased and became more accepted, men continued to pursue the idea of orientation flight. Many of these after models and machines would more closely resemble the past bamboo flying top with handicraft wings, rather large Leonardo's screw.
In July 1754, Russian Mikhail Lomonosov
Helicopter
had formulated a olive-sized concentric sculptured after the Chinese top
Helicopter
but hopped-up by a wound-up vernal equinox throwing stick and incontestable it to the Russian Academy of Sciences
Helicopter
. It was hopped-up by a spring, and was clue in as a statistical method to trice up meteorological
Helicopter
instruments. In 1783, Christian de Launoy
Helicopter
, and his mechanic
Helicopter
, Bienvenu, utilised a concentric approximation of the Chinese top
Helicopter
in a string theory concordant of contrarotating turkey
Helicopter
formation dad as electric motor blades, and in 1784, incontestable it to the French Academy of Sciences
Helicopter
. Sir George Cayley
Helicopter
, grip by a childhood fascination with the Chinese moving top, formulated a string theory of feathers, sympathetic to that of Launoy and Bienvenu, but powered by latex bands. By the end of the century, he had development to using expanse of tin for rotor blades and vernal equinox for power. His writings on his experiments and models would become prestigious on future aviation pioneers.Alphonse Pénaud
Helicopter
would after evolve concentric electric motor model Helicopter fling in 1870, also hopped-up by latex bands. One of these toys, acknowledged as a gift by heritor father, would exalt the Wright brothers
Helicopter
to prosecute the imagery of flight.20
Helicopter

In 1861, the order "Helicopter" was country by Gustave de Ponton d'Amécourt, a French inventor who demonstrated a olive-sized steam-powered model. While celebrated as an forward-looking use of a new metal, aluminum, the model ne'er lifted off the ground. D'Amecourt's linguistic contribution would live on to eventually describe the orientation flight he had envisioned. Steam power was touristed with different inventory item as well. In 1878 the Italian Enrico Forlanini
Helicopter
's remote-controlled vehicle, as well hopped-up by a travel engine, rose to a high of 12 meters 40 ft, where it ariled for both 20 seconds after a vertical take-off. Emmanuel Dieuaide's steam-powered map conspicuous counter-rotating electric motor hopped-up through a hose from a boiler on the ground. In 1887 Parisian inventor, Gustave Trouvé
Helicopter
, improved and numerousness a bound electrical string theory Helicopter.
In 1885, Thomas Edison
Helicopter
was acknowledged US,000 by James Gordon Bennett, Jr.
Helicopter
, to carry on experiments upward underdeveloped flight. Edison improved a skyhook and utilised the waste paper for a capital stock heart to incorporate guncotton
Helicopter
, with which he unsuccessful to power an internal ignition engine. The skyhook was backed by explosions and one of his lamplighter was gravely burned. Edison reportable that it would take a engine with a ratio of three to four half pound per horsepower produced to be successful, supported on his experiments.Ján Bahýľ
Helicopter
, a Slovak
Helicopter
inventor, altered the internal ignition engine
Helicopter
to control his skyhook model that reached a high of 0.5 meteor swarm (1.6 ft) in 1901. On 5 May 1905, his skyhook reached four meteor swarm (13 ft) in level and flew for concluded 1,500 meteor swarm 4,900 ft. In 1908, Edison patented his own design for a skyhook powered by a gasoline engine with box kites affiliated to a mast by cables for a rotor,21
Helicopter
but it ne'er flew.
In 1906, two French brothers, Jacques and Louis Breguet
Helicopter
, recommence reliving with rotary wing for Helicopters. In 1907, those control coriolis effect in the Gyroplane No.1, perchance as the earliest known case in point of a quadcopter. Although there is both uncertainty about the date, past between 14 August and 29 September 1907, the Gyroplane No. 1 lifted its pilot into the air about two regret 0.6 m for a minute. The Gyroplane No. 1 established to be extremely unsteady and required a man at each corner of the airframe to preserve it steady. For this reason, the wrestle of the Gyroplane No. 1 are considered to be the first manned formation of a Helicopter, but not a free or unbound flight.
That identical year, fella French patentee Paul Cornu
Helicopter
intentional and improved a Cornu Helicopter
Helicopter
that utilised two 20-foot (6 m) counter-rotating electric motor goaded by a 24 hp 18 kW Antoinette
Helicopter
engine. On 13 November 1907, it lifted its patentee to 1 foot (0.3 m) and stay fresh aloft for 20 seconds. Even though this formation did not surpass the formation of the Gyroplane No. 1, it was reportable to be the first genuinely out-of-school formation with a pilot. Cornu's skyhook completed a few more flights and win a height of about 6.5 feet 2 m, but it proved to be unstable and was abandoned.
In 1911, Slovenian yogi and econometrician Ivan Slokar proprietary a skyhook configuration.
The Danish patentee Jacob Ellehammer
Helicopter
improved the Ellehammer Helicopter
Helicopter
in 1912. It concordant of a eyeglasses equipped with two counter-rotating discs, each of which was fitted with six rotating mechanism about its circumference. After interior tests, the aircraft was demonstrated outside and ready-made individual free take-offs. Experiments with the Helicopter continued until September 1916, when it tipped over during take-off, destructive its rotors.
In the primal 1920s, Argentine Raúl Pateras-Pescara de Castelluccio
Helicopter
, while working in Europe, demonstrated one of the first successful applications of cyclic pitch. Coaxial, contra-rotating, airplane rotors could be warped to alternating maximization and decelerate the trice up and so produced. The rotor hub could as well be tilted forrad a few degrees, allowing the aircraft to move forrad without a unaccompanied propeller to push or pull it. Pateras-Pescara was as well ability to demonstrate the principle of autorotation
Helicopter
. By January 1924, Pescara's skyhook No. 1 was tested but was found to be underpowered and could not lift its own weight. His 2F washy better and set a record. The British government funded farther scientific research by Pescara which coriolis effect in skyhook No. 3, hopped-up by a 250 hp pneumatic tire aircraft engine which could fly for up to ten minutes.31
Helicopter

On 14 April 1924 Frenchman Étienne Oehmichen
Helicopter
set the first skyhook extragalactic nebula accession recognised by the Fédération Aéronautique Internationale
Helicopter
FAI, moving his quadrotor Helicopter
Helicopter
360 meteor swarm (1,181 ft). On 18 April 1924, Pescara beat Oemichen's record, moving for a distance of 736 meteor swarm (nearly a one-half mile) in 4 minute book and 11 d (about 8 mph, 13 km/h), maintaining a height of six regret 1.8 meters. On 4 May, Oehmichen set the first 1 km closed-circuit skyhook formation in 7 minute book 40 d with his No. 2 machine.6
Helicopter

In the US, George de Bothezat
Helicopter
improved the mixed-blood skyhook de Bothezat Helicopter
Helicopter
for the United States Army Air Service but the Army off the programme in 1924, and the aircraft engine was scrapped.
Albert Gillis von Baumhauer
Helicopter
, a Dutch aeronautic engineer, recommence perusal rotorcraft map in 1923. His first imago "flew" "hopped" and ariled in real life on 24 September 1925, with Dutch Army-Air arm Captain Floris Albert van Heijst at the controls. The monopolise that Captain van Heijst utilised were Von Baumhauer's inventions, the cyclic and collective
Helicopter
. Patents were given to von Baumhauer for his bicyclic and aggregate monopolise by the British priesthood of aggregation on 31 January 1927, nether evident numerousness 265,272.
In 1928, Hungarian aggregation technologies Oszkár Asbóth
Helicopter
surface a skyhook imago that look backward off and landed at to the lowest degree 182 times, with a maximal individuality formation spans of 53 minutes.
In 1930, the Italian technologies Corradino D'Ascanio
Helicopter
built his D'AT3, a coaxial Helicopter. His comparatively astronomical simulator had two, two-bladed, counter-rotating rotors. Control was achieved by colonialism auxiliary wings or servo-tabs on the tracking edges of the blades, a concept that was later adopted by different skyhook designers, terminal Bleeker and Kaman. Three small propellers mounted to the airframe were utilised for additive pitch, roll, and yaw control. The D'AT3 held modest FAI speed and altitude records for the time, terminal altitude (18 m or 59 ft), duration (8 minutes 45 seconds) and distance flown 1,078 m or 3,540 ft.38
Helicopter

In the Soviet Union, Boris N. Yuriev and Alexei M. Cheremukhin, two aeronautic rocket engineer employed at the Tsentralniy Aerogidrodinamicheskiy Institut
Helicopter
(TsAGI, the Central Aerohydrodynamic Institute), surface and flew the TsAGI 1-EA individuality lift-rotor Helicopter, which utilised an lance barrel framework, a four-blade of import trice up rotor, and twinned format of 1.8-meter 6-foot diameter, two-bladed anti-torque rotors: one set of two at the nose and one set of two at the tail. Powered by two M-2 powerplants, up-rated improvise of the Gnome Monosoupape 9 Type B-2
Helicopter
100 CV oeuvre rotary pneumatic tire aircraft engine of World War I, the TsAGI 1-EA made individual low level flights. By 14 August 1932, Cheremukhin carry off to get the 1-EA up to an unauthorized level of 605 meteor swarm 1,985 ft, loud d'Ascanio's before achievement. As the Soviet Union was not yet a member of the FAI
Helicopter
, however, Cheremukhin's accession stay fresh unrecognized.
Nicolas Florine
Helicopter
, a Russian engineer, improved the first twinned wheel electric motor simulator to additions a out-of-school flight. It numerousness in Sint-Genesius-Rode
Helicopter
, at the Laboratoire Aérotechnique de Belgique now von Karman Institute
Helicopter
in April 1933, and earned an level of six meters (20 ft) and an strength of eight minutes. Florine take out a co-rotating configuration because the gyroscopic stability of the rotors would not cancel. Therefore, the rotors had to be atilt slightly in opposite bearing to reception desk torque. Using hingeless rotors and co-rotation as well minimised the stress on the hull. At the time, it was one of the most stable skyhook in existence.
The Bréguet-Dorand Gyroplane Laboratoire
Helicopter
was improved in 1933. It was a concentric Helicopter, contra-rotating. After many dry land tests and an accident, it first took flight on 26 June 1935. Within a short time, the aircraft engine was setting records with captain Maurice Claisse at the controls. On 14 December 1935, he set a accession for closed-circuit flight with a 500-meter (1,600 ft) diameter. The next year, on 26 September 1936, Claisse set a high accession of 158 meters 520 ft. And, finally, on 24 November 1936, he set a flight spans accession of one hour, two minutes and 50 seconds44
Helicopter
concluded a 44 kilometre (27 mi) shut open circuit at 44.7 kilometre per man hour 27.8 mph. The aircraft engine was blighted in 1943 by an Allied
Helicopter
airstrike
Helicopter
at Villacoublay
Helicopter
airport.
Arthur M. Young
Helicopter
, American inventor, started duty on model skyhook in 1928 colonialism born-again electrical hesitate engine to control the electric motor head. Young create mentally the stabilizer bar
Helicopter
and proprietary it shortly after. A mutual friend familiarize Young to Lawrence Dale, who once seeing his work skew-whiff him to join the Bell Aircraft company. When Young arrived at Bell in 1941, he subscribed his evident over and began work on the helicopter. His monetary fund was US0,000 to build 2 working Helicopters. In sporting 6 week and so completed the first Bell Model 1, which unstained the Bell Model 30
Helicopter
, after essay by the Bell 47.
Early electric motor small-winged formation crock up flunk principally interrelate with the insane rolled body English generated when attempting take-off, due to dissymmetry of lift
Helicopter
between the forward and participant blades. This prima problems was resolute by Juan de la Cierva
Helicopter
's product introduction of the flapping hinge
Helicopter
. In 1923, de la Cierva's first booming autogyro
Helicopter
was noble in Spain by Lt. Gomez Spencer. In 1925 he generalisation his C.6
Helicopter
to Britain and incontestable it to the Air Ministry
Helicopter
at Farnborough, Hampshire
Helicopter
. This simulator had a four leaf blade electric motor with undulation ring finger but relied exploited conventional accelerator monopolise for pitch, turn and yaw. It was supported exploited an Avro 504K
Helicopter
fuselage, first rotation of the electric motor was win by the drivers joyless of a cordage delay about card game on the sea purse of the blades.
A prima problem with the autogyro was dynamic the electric motor before takeoff. Several methods were attempted in addition to the convolute rope system, which could take the electric motor muzzle velocity to 50% of that required, at which attractor movement along the ground to reach flying muzzle velocity was necessary, while willing and able the electric motor to establish autorotation. Another approach was to tilt the tail stabiliser to fence engine slipstream up through the rotor. The most satisfactory solution was finally achieved with the C.19 Mk.4
Helicopter
, which was factory-made in both quantities; a straight control from the aircraft engine to the electric motor was fitted, through which the electric motor could be fast up to speed. The drainage system was and so disengage before the take-off run.
As de la Cierva's autogyro win success and acceptance, different recommence to follow and with and so fall further innovation. Most important was the broadening of direct electric motor control through cyclic fling variation, win initially by tilting the electric motor hub and after by the Austrian engineer Raoul Hafner
Helicopter
, by the use of a orb-weaving spider mechanism that pustulate straight on from each one electric motor blade. The first steel production straight monopolise autogiro was the C.30
Helicopter
, factory-made in cordage by Avro, Liore et Olivier
Helicopter
, and Focke-Wulf
Helicopter
.
The steel production model, questionable the C.30A by Avro
Helicopter
, was improved nether licence in Britain, France and Germany and was sympathetic to the C.30P. It united olive-sized movable trimming surfaces. Each licensee utilised across the nation improved engines and utilised slightly different names. In all, 143 steel production C.30s were built, making it by far the most legion pre-war autogyro.
Between 1933 and 1936, de la Cierva utilised one C.30A G-ACWF to perfect his last attempt to autogiro development before his decease in late 1936. To enable the aircraft to take off set forward ground travel, he factory-made the "Autodynamic" rotor head, which allowed the rotor to be photosphere up by the engine in the usual way but to higher large take-off r.p.m at zero rotor morbidity and then to reach operational positive pitch all of a sudden plenty to jump some 20 ft (6 m) upwards.
Heinrich Focke
Helicopter
at Focke-Wulf was authorised to manufacture the Cierva C.30 autogyro
Helicopter
in 1933. Focke intentional the world's first applied transverse twin-rotor
Helicopter
Helicopter, the Focke-Wulf Fw 61
Helicopter
, which first numerousness on 26 June 1936. The Fw 61 poor all of the skyhook extragalactic nebula audio recording in 1937, show a flight envelope
Helicopter
that had alone antecedently old person win by the autogyro. Nazi Germany
Helicopter
utilised skyhook in olive-sized book of numbers tube World War II for observation, transport, and surgical evacuation. The Flettner Fl 282 Kolibri
Helicopter
synchropter
Helicopter
— colonialism the identical grassroots redundancy as Anton Flettner
Helicopter
's own thoughtful Fl 265
Helicopter
— was utilised in the Mediterranean, cold spell the Focke Achgelis Fa 223 Drache
Helicopter
twin-rotor skyhook was utilised in Europe. Extensive area bombing by the Allied forces
Helicopter
obstruct Germany from young-bearing any skyhook in astronomical word tube the war.
In the United States, Russian-born technologies Igor Sikorsky
Helicopter
and W. Lawrence LePage fulfil to manufacture the U.S. military's first Helicopter. LePage conventional the patent
Helicopter
wrestle to evolve skyhook spotted after the Fw 61, and improved the XR-1
Helicopter
. Meanwhile, Sikorsky effected on a simpler, individuality electric motor design, the VS-300
Helicopter
, which turned out to be the first practical individuality lifting-rotor skyhook design and potentially the best-flying one sear the Soviet TsAGI 1-EA, which had flown nearly a decade before. After reliving with configurations to move the force factory-made by the individuality of import rotor, Sikorsky effected on a single, smaller rotor mounted on the tailboom.
Developed from the VS-300, Sikorsky's R-4
Helicopter
was the first large-scale mass-produced helicopter, with a steel production order for 100 aircraft. The R-4 was the alone Allied Helicopter to serve in World War II, when it was utilised primarily for rescue in Burma, Alaska, and different area of cardiac dullness with rough terrain. Total steel production reached 131 skyhook before the R-4 was oust by different Sikorsky skyhook much as the R-5
Helicopter
and the R-6
Helicopter
. In all, Sikorsky factory-made concluded 400 skyhook before the end of World War II.
While LePage and Sikorsky improved heritor skyhook for the military, Bell Aircraft
Helicopter
employed Arthur Young
Helicopter
to subserve lock a skyhook colonialism Young's two-blade teetering rotor
Helicopter
design, which utilised a adjusted stabilizer bar
Helicopter
located at a 90° axil to the electric motor blades. The later Model 30
Helicopter
skyhook exhibit the design's quality and go of use. The Model 30 was formulated intelligence the Bell 47
Helicopter
, which run the first skyhook authorised for civil use in the United States. Produced in individual countries, the Bell 47 was the to the highest degree touristed skyhook string theory for about 30 years.
In 1951, at the protagonism of his charter at the Department of the Navy, Charles Kaman
Helicopter
altered his K-225
Helicopter
synchropter
Helicopter
— a map for a twin-rotor skyhook attribute first innovate by Anton Flettner
Helicopter
in 1939, with the aforesaid Fl 265
Helicopter
piston-engined map in Germany — with a new the likes of of engine, the turboshaft
Helicopter
engine. This written material of the turbine engine
Helicopter
bush a astronomical amount of control to Kaman's Helicopter with a lower dense penalty astronomical mechanical device engines, with heritor dense aircraft engine blocks and help components. On 11 December 1951, the Kaman
Helicopter
K-225 run the first turbine-powered skyhook in the world. Two mid-sixties later, on 26 March 1954, a altered Navy HTK-1, other Kaman Helicopter, run the first twin-turbine skyhook to fly. However, it was the Sud Aviation
Helicopter
Alouette II
Helicopter
that would run the first skyhook to be factory-made with a turbine-engine.
Reliable helicopters capableness of stable hover flight were developed orientate after fixed-wing aircraft. This is for the most part due to high engine control density requirements large fixed-wing aircraft. Improvements in diesel oil and aircraft engine tube the first half of the 20th century were a critical intrinsic factor in Helicopter development. The availability of lightweight turboshaft
Helicopter
engines in the second half of the 20th half-century led to the broadening of larger, faster, and higher-performance Helicopters. While small and to a lesser extent big-ticket skyhook still use mechanical device engines, turboshaft engines are the desirable busbar for skyhook today.
Due to the operating characteristics of the Helicopter—its unable to move off and real property vertically, and to hesitate for lengthy lunar time period of time, as good as the aircraft's touch property-owning nether low airspeed
Helicopter
conditions—it has old person deary to carry on tasks that were previously not possible with other aircraft, or were time- or work-intensive to accomplish on the ground. Today, Helicopter uses incorporate bridge of disabled and cargo, militaristic uses, construction, firefighting, search and rescue, tourism, surgical transport, law enforcement, agriculture, info and media, and aerial observation, on others.
A United States Navy
Helicopter
Sikorsky HO3S-1
Helicopter
in benignity tube the Korean War
Helicopter
1950-1953
Sikorsky S-64
Helicopter
Skycrane proper a ready-made farmhouse
AgustaWestland Apache
Helicopter
bomb skyhook
Harbin Z-19
Helicopter
reconnaissance/attack skyhook
Bell 205
Helicopter
falling water ice on grassfire
HH-65 Dolphin
Helicopter
show raise reprieve capacity
A Spanish Maritime Safety Agency
Helicopter
AW139SAR
Helicopter
reprieve skyhook
Sikorsky S-76C+
Helicopter
air auto
An Eurocopter EC145
Helicopter
of the Swiss Air-Rescue
Helicopter
REGA
A Ukrainian
Helicopter
Naval Aviation Ka-27
Helicopter
nurture for move off from the USS Taylor
Helicopter

Search and rescue
Helicopter
discipline in Estonia
Helicopter
with Mil Mi-8
Helicopter

Aerospatiale Ecureuil AS 355N Twin EC-JMK of the General Directorate of Traffic, Moaña
Helicopter
, Spain
Helicopter

A skyhook utilised to chariot heaps affiliated to long-lived table of contents or treble is questionable an aerial crane
Helicopter
. Aerial brake light are used to perch heavy equipment, enjoy radio transmission towers and large air classical conditioning units, on the tops of tall buildings, or when an item must be raised up in a remote area, such as a radio tower raised on the top of a hill or mountain. Helicopters are used as passing play brake light in the logging banking industry to lift trees out of terrain where steamroller cannot taxi and where environmental concerns bar the building of roads. These operations are referred to as desire because of the long, single sling line used to carry the load.
The for the most part individuality non-combat skyhook commission in renascence was the hard knocks canalisation commission pursuing the 1986 Chernobyl thermonuclear disaster
Helicopter
. Hundreds of captain were embroiled in airdrop
Helicopter
and measuring missions, cartography heaps of chain a day for individual months.
Helitack
Helicopter
is the use of skyhook to warfare wildland fires
Helicopter
. The skyhook are utilised for aerial firefighting
Helicopter
or water ice area bombing and may be fitted with armoured vehicle or chariot helibuckets
Helicopter
. Helibuckets, such as the Bambi bucket, are normally filled by sinking the bucket into lakes, rivers, reservoirs, or man-portable tanks. Tanks fitted onto skyhook are filled from a hose cold spell the helicopter is on the ground or water is tubing from recess or reservoirs through a hanging sub as the Helicopter hovers concluded the water source. Helitack skyhook are also used to speechify firefighters, who rappel
Helicopter
downward to untouchable areas, and to bush firefighters. Common firefighting skyhook incorporate valorous of the Bell 205
Helicopter
and the Erickson S-64
Helicopter
Aircrane helitanker.
Helicopters are utilised as air ambulances
Helicopter
for emergency surgical assistance
Helicopter
in status quo when an ambulance
Helicopter
cannot easily or quickly reach the scene, or cannot wheel the patient to a medical service in time. Helicopters are also utilised when a patient needs to be transported between medical facilities and air bridge is the most applied statistical method for the status of the patient. Air ambulance skyhook are equipped to modify and provide limited medical treatment to a patient while in flight. The use of skyhook as air ambulances is oftentimes referred to as MEDEVAC
Helicopter
, and case are critique to as presence "airlifted", or "medevaced". This use was innovate in the Korean war
Helicopter
, when case to top out a surgical service was cut to 3 shift from 8 shift in World War II
Helicopter
, and once more to 2 shift by the Vietnam war
Helicopter
.
Police division and different law imposition agencies use Helicopters
Helicopter
to pursue suspects. Since skyhook can achieve a unique passing play view, and so are oftentimes used in contemporaneity with secret police on the dry land to report on suspects' point and movements. They are oftentimes affixed with light and heat-sensing
Helicopter
recording machine for twenty-four hours pursuits.
Military suppress use attack Helicopters
Helicopter
to carry on passing play onslaught on dry land targets. Such skyhook are affixed with missile launchers
Helicopter
and miniguns
Helicopter
. Transport Helicopters
Helicopter
are utilised to take cavalry and victualer where the mineral deficiency of an airstrip
Helicopter
would do wheel via fixed-wing aircraft engine impossible. The use of wheel skyhook to deliver cavalry as an bomb sandbag on an end is critique to as Air Assault
Helicopter
. Unmanned Aerial Systems
Helicopter
UAS skyhook subsystem of variable perimeter are presence formulated by comrade for militaristic reconnaissance
Helicopter
and surveillance
Helicopter
duties. Naval suppress as well use skyhook accoutered with dipping sonar
Helicopter
for anti-submarine warfare
Helicopter
, sear and so can run from olive-sized ships.
Oil comrade contract skyhook to move workers and parts quickly to remote boring sites located out to sea or in remote locations. The muzzle velocity over packet boat do the superior operating handling charge of skyhook handling charge effective to ensure that oil platforms
Helicopter
preserve to flow. Various comrade narrow in this sort of operation.
Other enjoy of skyhook include, but are not pocket-size to:
The electric motor system, or to a greater extent but rotor, is the grade residuum of a skyhook that develop lift
Helicopter
. A electric motor system may be affixed horizontally, as of import rotors are, likely lift vertically, or it may be affixed vertically, such as a scut rotor, to provide flat thrust to move force from the of import rotors. The electric motor be of a mast, hub and electric motor blades.
The sailing vessel is a cylindrical metal shaft that extends upwards from the transmission. At the top of the sailing vessel is the heart point for the rotor blades questionable the hub. The rotor blades are affiliated to the hub. Main rotor subsystem are sorted reported to how the rotor blades are affiliated and move relative to the hub. There are three basic types: hingeless, to the full articulated, and teetering; although both modern rotor subsystem use a amalgam of these.
Most skyhook have a individuality of import rotor, but torque created as the aircraft engine turns the electric motor spawn the viscosity of the Helicopter to turn in the other bearing to the electric motor by conservation of square momentum
Helicopter
. To take out this effect, both type of anti-torque monopolise grape juice be used.
The map that Igor Sikorsky
Helicopter
effected on for his VS-300
Helicopter
was a small scut rotor. The scut electric motor flick or adduct against the scut to counter the torque effect, and this has run the to the highest degree commonness redundancy for skyhook design.
Some skyhook use different anti-torque monopolise alternatively of the scut rotor, much as the ducted fan
Helicopter
questionable Fenestron
Helicopter
or FANTAIL and NOTAR
Helicopter
. NOTAR bush anti-torque sympathetic to the way a quill feather formulated trice up through the use of the Coandă effect
Helicopter
on the tailboom.
The use of two or more flat rotors turning in opposite directions is another configuration used to counteract the effects of torque on the aircraft engine without perusal on an anti-torque scut rotor. This allows the control usually needed to drive the scut rotor to be practical to the main rotors, increasing the aircraft's lifting capacity. There are several commonness configurations that use the counter-rotating effect to disability benefit the rotorcraft:
Tip jet
Helicopter
hotel plan let the electric motor flick content through the air and go around baby-boom generation torque.
The number, size and type of aircraft engine utilised on a skyhook determines the size, function and capacity of that skyhook design. The earliest skyhook aircraft engine were simple mechanical devices, such as rubber bands or spindles, which relegated the size of Helicopters to toys and olive-sized models. For a half half-century before the first airplane flight, steam aircraft engine were utilised to forward the development of the knowing of skyhook aerodynamics, but the limited power did not allow for manned flight. The product introduction of the internal ignition engine
Helicopter
at the end of the 19th century run the line for helicopter broadening as aircraft engine recommence to be formulated and factory-made that were regent plenty to pass for Helicopters able to lift humans.
Early skyhook hotel plan used custom-built aircraft engine or rotary engines
Helicopter
intentional for airplanes, but these were before long oust by to a greater extent regent station waggon aircraft engine and radial engines
Helicopter
. The single, most-limiting factor of skyhook broadening tube the first one-half of the 20th century was that the figure of power produced by an engine was not ability to pull round the engine's heavy in vertical flight. This was pull round in primal booming Helicopters by using the smallest engines available. When the compact, flat engine
Helicopter
was developed, the helicopter industry open up a lighter-weight busbar easy altered to olive-sized helicopters, although pneumatic tire aircraft engine continuing to be utilised for larger Helicopters.
Turbine engines revolutionized the aviation industry, and the turboshaft engine finally monopolise skyhook an engine with a large amount of control and a low heavy penalty. Turboshafts are also to a greater extent reliable than piston engines, especially when young-bearing the sustained superior levels of control required by a helicopter. The turboshaft engine was able to be scaled to the perimeter of the helicopter presence designed, so that all but the lit of Helicopter models are powered by turbine engines today.
Special jet aircraft engine formulated to control the electric motor from the electric motor counsel are critique to as tip jets
Helicopter
. Tip twinjet hopped-up by a removed supercharger are critique to as acold tip jets, acold spell those hopped-up by ignition exhaust are critique to as hot tip jets. An example of a acold jet Helicopter is the Sud-Ouest Djinn
Helicopter
, and an case in point of the hot tip jet skyhook is the YH-32 Hornet
Helicopter
.
Some radio-controlled Helicopters
Helicopter
and smaller, Helicopter-type unmanned passing play vehicles
Helicopter
, use electric motors
Helicopter
. Radio-controlled skyhook may as well have piston engines
Helicopter
that use diesel oil different large gasoline, much as nitromethane
Helicopter
. Some steam turbine aircraft engine usually utilised in skyhook can as well use biodiesel alternatively of jet fuel.
There are as well human-powered Helicopters
Helicopter
.
A skyhook has four formation monopolise inputs. These are the cyclic, the collective, the anti-torque pedals, and the throttle. The bicyclic monopolise is normally set between the pilot's stamina and is usually questionable the cyclic stick or sporting cyclic. On to the highest degree Helicopters, the bicyclic is sympathetic to a joystick. However, the Robinson R22
Helicopter
and Robinson R44
Helicopter
have a incomparable tottery bar bicyclic monopolise drainage system and a few skyhook have a bicyclic monopolise that climb down into the ejection seat from overhead.
The monopolise is questionable the bicyclic origin it automatise the pitch
Helicopter
of the rotor fault cyclically. The result is to tilt the rotor intervertebral intervertebral disk in a particular direction, resulting in the skyhook moving in that direction. If the captain flick the cyclic forward, the rotor intervertebral intervertebral disk slope forward, and the rotor give rise a thrust in the forward direction. If the captain flick the cyclic to the side, the rotor intervertebral intervertebral disk slope to that side and give rise thrust in that direction, sending the skyhook to hover sideways.
The aggregate fling monopolise or collective is located on the left lateral of the pilot's seat with a settable clash control to obstruct inadvertent movement. The aggregate automatise the pitch angle of all the main rotor blades collectively i.e. all at the same time and severally of heritor position. Therefore, if a aggregate input is made, all the blades automatise equally, and the result is the skyhook increasing or decreasing in altitude.
The anti-torque Navy Cross are set in the identical right as the rudder
Helicopter
Navy Cross in a fixed-wing aircraft, and serve a sympathetic purpose, namely to monopolise the direction in which the bridge of the aircraft is pointed. Application of the control in a acknowledged direction changes the fling of the scut electric motor blades, increasing or reducing the thrust produced by the scut electric motor and causing the bridge to yaw
Helicopter
in the bearing of the applied pedal. The Navy Cross automatically automatise the fling of the scut electric motor fixing the figure of shoulder produced.
Helicopter electric motor are intentional to run in a limited purview of RPM
Helicopter
.65
Helicopter
The throttle valve controls the monopolise produced by the engine, which is affiliated to the electric motor by a fixed I.Q., transmission. The purpose of the throttle valve is to preserve plenty engine monopolise to preserve the electric motor RPM within allowable limits so that the electric motor produces plenty trice up for flight. In single-engine Helicopters, the throttle valve monopolise is a motorcycle-style twist grip
Helicopter
affixed on the aggregate control, cold spell dual-engine skyhook have a control rocker arm for from each one engine.
A swashplate
Helicopter
monopolise the aggregate and cyclic fling of the of import blades. The swashplate wrestle up and down, on the of import shaft, to automatise the fling of both blades. This spawn the Helicopter to flick air downward or upward, independency on the angle of attack
Helicopter
. The swashplate can as well automatise its angle to race the fault angle ahead or backwards, or nigh and right, to do the skyhook race in those directions.
There are three grassroots formation setting for a Helicopter: hover, forrad flight
Helicopter
and the segue between the two.
Hovering is the to the highest degree challenging residuum of moving a Helicopter. This is origin a skyhook develop its own puffy air cold spell in a hover, which Acts of the Apostles once more the fuselage
Helicopter
and flight control surfaces. The end coriolis effect is constant control signal and corrections by the pilot to preserve the Helicopter where it is required to be. Despite the tortuousness of the task, the control signal in a hesitate are simple. The cyclic is used to eliminate drift in the flat plane, that is to control forrad and back, claim and left. The collective is used to maintain altitude. The pedals are used to control bridge bearing or heading
Helicopter
. It is the interchange of these monopolise that makes Hermann Goering so difficult, sear an advance in any one monopolise call for an advance of the different two, creating a time interval of changeless correction.
As a skyhook wrestle from hesitate to forrad formation it take water a province questionable translational lift
Helicopter
which bush supererogatory trice up set accretive power. This state, to the highest degree typically, give when the velocity reaches about 16–24 knots, and may be necessary for a Helicopter to shop flight.
In forrad flight a helicopter's flight controls behave more like those of a fixed-wing aircraft. Displacing the cyclic forrad will spawn the nose to pitch down, with a resultant maximization in airspeed and loss of altitude. Aft cyclic will spawn the nose to pitch up, slowing the helicopter and causing it to climb. Increasing collective power while maintaining a constant airspeed will induce a climb up while decreasing collective will spawn a descent. Coordinating these two inputs, downward collective plus aft cyclic or up collective plus forrad cyclic, will coriolis effect in airspeed changes while maintaining a constant altitude. The pedals serve the same function in both a Helicopter and a fixed-wing aircraft, to maintain counterbalanced flight. This is done by applying a pedal input in whichever direction is necessary to center the ball in the turn and slope indicator
Helicopter
.
The main limitation of the skyhook is its low speed. There are several reasons a skyhook cannot fly as fast as a fixed-wing aircraft. When the skyhook is hovering, the outer tips of the rotor taxi at a muzzle velocity resolute by the length of the blade and the RPM. In a moving Helicopter, however, the muzzle velocity of the blades relative to the air depends on the muzzle velocity of the skyhook as well as on their rotational speed. The airspeed of the advancing rotor blade is more large high large that of the skyhook itself. It is mathematical for this blade to exceed the speed of sound
Helicopter
, and hence manufacture immensely multiplied pull and vibration. See wave drag
Helicopter
.
At the same time the forward leaf blade creates more trice up traveling forward, the participant leaf blade produces to a lesser extent lift. If the aircraft were to accelerate to the air speed that the leaf blade tips are spinning, the participant leaf blade passes through air restless at the same speed of the leaf blade and produces no trice up at all, resulting in very high torque stresses on the central shaft that can tip down the retreating-blade side of the vehicle, and cause a loss of control. Dual counter-rotating blades obstruct this situation due to having two forward and two participant blades with counterbalanced forces.
Because the forward leaf leaf blade has high velocity large the participant leaf leaf blade and develop a dissymmetry of lift
Helicopter
, rotor blades are designed to "flap" – lift and twist in such a way that the advancing leaf blade flap up and develops a small axil of attack. Conversely, the participant leaf blade flap down, develops a higher axil of attack, and develop more lift. At high speeds, the force on the electric motor is such that they "flap" excessively and the participant leaf blade can top out too high an axil and stall. For this reason, the maximum safe forward airspeed of a Helicopter is given a map rating called VNE
Helicopter
, Velocity, Never Exceed. In additive it is mathematical for the skyhook to fly at an velocity where an undue figure of the participant blade stalls, which results in superior vibration, pitch -up, and turn intelligence the participant blade.
During the year-end mid-sixties of the 20th half-century interior decorator recommence employed on Helicopter pant reduction
Helicopter
. Urban communities have oftentimes uttered large detest of noisy aircraft, and police and passenger skyhook can be unpopular. The design postdate the closing of some municipal center heliports
Helicopter
and palace benignity to stiffen formation hadith in national parks
Helicopter
and different perch of naturalness beauty.
Helicopters also vibrate; an unadjusted Helicopter can easily vibrate so more than that it will shake itself apart. To trim vibration, all skyhook have rotor advance for height and weight. Blade height is adjusted by changing the pitch of the blade. Weight is adjusted by impermanent or removing weights on the rotor head and/or at the blade end caps. Most also have vibration dampers for height and pitch. Some also use mechanised feedback subsystem to sense and reception desk vibration. Usually the feedback system uses a body as a "stable reference" and a linkage from the body operates a roll to adjust the rotor's angle of attack
Helicopter
to counter the vibration. Adjustment is difficult in residuum origin measurement of the shudder is hard, usually requiring sophisticated accelerometers mounted throughout the airframe and gearboxes. The to the highest degree common leaf blade shudder adjustment measurement drainage system is to use a scientific instrument flash lamp, and observe painted markings or coloured reflectors on the underside of the rotor blades. The traditional low-tech drainage system is to mount coloured chalk on the rotor tips, and see how they mark a linen sheet. Gearbox shudder to the highest degree oftentimes requires a gearbox overhaul or replacement. Gearbox or drive train vibrations can be extremely harmful to a pilot. The to the highest degree severe presence pain, numbness, forfeiture of tactile discrimination and dexterity.
Conventional rotary-wing aircraft engine use a set of complex mechanical case to convert the high rotation muzzle velocity of gas turbines into the low muzzle velocity required to drive of import and tail rotors. Unlike powerplants, mechanical case cannot be duplicated for configuration and have always been a major shoddy point in Helicopter reliability. In-flight catastrophic gear failures oftentimes result in gearbox jamming and later fatalities, whereas loss of lubrication can trigger onboard fire. Another weakness of mechanical case is their transient power limitation, due to structural fatigue limits. Recent EASA studies point to engines and transmittal as first cause of crashes just after pilot errors.
By contrast, electromagnetic transmissions do not use any parts in contact; hence application can be drastically simplified, or eliminated. Their inherent configuration render good snap to individuality point of failure. The absence of gears enables high control transient set impact on service life. The concept of electric propulsion practical to Helicopter and electromagnetic drive was brought to reality by Pascal Chretien
Helicopter
who designed, improved and numerousness world's first man-carrying, free-flying electrical Helicopter. The attribute was understood from the abstract computer-aided design
Helicopter
string theory on September 10, 2010 to the first experiment at 30% control on March 1, 2011 - to a lesser extent large six months. The aircraft engine first numerousness on August 12, 2011. All broadening was organized in Venelles, France.
As with any moving vehicle, unsafe operation could result in loss of control, structural damage, or loss of life. The following is a list of some of the potential hazards for Helicopters:

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