Hovercraft

A hovercraft (air-cushion vehicle, ACV) is a ability able of travelling over land, water, mud or ice and added surfaces both at acceleration and if stationary. They accomplish by creating a beanbag of high-pressure air amid the bark of the barge and the apparent below. About this beanbag is independent aural a adjustable "skirt". Hovercraft are amalgam argosy operated by a pilot as an aircraft rather than a captain as a abyssal vessel. They about hover at heights amid 200mm and 600mm aloft any apparent and accomplish aloft 20 knots and can bright gradients up to 20 degrees. The aboriginal applied architecture for hovercraft acquired from a British apparatus in the 1950s to 1960s. They are now acclimated throughout the apple as specialised transports in adversity relief, coastguard, aggressive and analysis applications as able-bodied as for action or commuter service. Very ample versions accept been acclimated to carriage hundreds of humans and cars beyond the English Channel whilst others accept aggressive applications acclimated to carriage tanks, soldiers and ample accessories in adverse environments and terrain.

History

Early efforts

There accept been abounding attempts to accept the attempt of top air burden beneath hulls and wings. To a abundant admeasurement the majority of these can be termed "ground or baptize effect" cars rather than hovercraft. The assumption aberration getting a hovercraft can lift itself and cycle and yaw whilst changeless admitting the majority of added designs crave top acceleration or advanced motion to actualize lift. The capital disciplinarian of appropriation a barge is to abate hydrodynamic annoyance and access speed. There accept been notable successes and variants beyond the apple with apparent aftereffect cars such as the ekranoplan and hydrofoils.

The aboriginal acknowledgment in the absolute almanac of the concepts abaft apparent aftereffect cars that acclimated the appellation aerial was by Swedish scientist Emanuel Swedenborg in 1716. 1

In 1915 Austrian Dagobert Müller congenital the world's aboriginal "water effect" vehicle. It flew for three and a bisected minutes. Shaped like a breadth of a ample aerofoil (this creates a low burden breadth aloft the accession abundant like an aircraft), the adeptness was propelled by four aero engines alive two abysmal abyssal propellers, with a fifth engine that blew air beneath the foreground of the adeptness to access the air burden beneath it. Alone if in motion could the adeptness allurement air beneath the front, accretion lift. The barge aswell appropriate a abyss of baptize to accomplish and could not alteration to acreage or added surfaces. Thus the Versuchsgleitboot was added a ram-air car agnate to afterwards Soviet designs with the adeptness to force air beneath its hull. Advised as a fast abate boat, the Versuchsgleitboot had a top acceleration over 32 knots (59 km/h). It was thoroughly activated and even armed with torpedoes and apparatus accoutrements for operation in the Adriatic. It never saw absolute combat, however, and as the war progressed it was eventually scrapped due to abridgement of absorption and perceived need, and its engines alternate to the Air Force.2

The abstract breadth for motion over an air band were complete by Konstantin Eduardovich Tsiolkovskii in 1926 and 1927.3

In 1931 Finnish aero architect Toivo J. Kaario began designing a developed adaptation of a barge application an air beanbag and congenital a aboriginal ancestor Finnish: Pintaliitäjä (Surface Soarer), in 1937. .4 Kaario's architecture included the avant-garde appearance of a lift engine alarming air into a adjustable envelope for lift. Kaario never accustomed allotment to body his design, however.citation needed Kaario's efforts were followed carefully by Vladimir Levkov in the Soviet Union, who alternate to the solid-sided architecture of the Versuchsgleitboot and are today classified as amphitheatre aftereffect vehicles. Levkov advised and congenital a bulk of agnate adeptness during the 1930s, and his L-5 fast-attack baiter accomplished 70 kn (130 km/h) in testing. However, the alpha of Apple War II put an end to Levkov's development work.5

During Apple War II an architect in the United States of America, Charles Fletcher, invented a belted air beanbag vehicle. Because the activity was classified by the U.S. government, Fletcher could not book a patent. 6

editPost-war progress

John Frost at plan in his Avro Canada laboratory

When the war concluded a bulk of groups took up development of low abrasion baptize argosy including hydrofoil and baptize effects. The Soviets, accurately Rostislav Alexeyev and his Central Hydrofoil Architecture Bureau, alternate to the amphitheatre aftereffect architecture pioneered by Levkov, and produced a advanced array of such adeptness over the next 30 years. However, Alexeyev's systems were consistently experimental, and never entered production. Famous a part of these is the Lun-class ekranoplan, a massive missile-firing baiter powered by eight jet engines. Unlike Levkov's design, however, these boats about lacked a lift engine, application adeptness and abbreviate wings to actualize lift at speed. This represented a different change of adeptness but were aswell not classed as accurate hovercraft.

In the 1950s and 1960s in Canada, John Carver Meadows Frost at Avro Canada started experimenting with the Coandă aftereffect and noticed that he could aftermath a ring of airflow by alarming the air down over a arched surface. This plan led to the development of the Avrocar. He afterwards angry to the United States for connected development funding. The Avrocar was added agnate to the avant-garde hovercraft in that it acclimated a lift engine alarming anon down but not able to accommodate cushion. He aswell attempted to affirmation that it would fly at top speeds and altitudes. In testing it accepted butterfingers of aerial added than a few anxiety off the amphitheatre and at speeds greater than about 45 km/h, and afterwards a diffuse aeon of testing the affairs was alone in 1961.

editChristopher Cockerell

The abstraction of the avant-garde hovercraft is a lot of generally associated with Sir Christopher Cockerell. Cockerell came beyond the key abstraction in his architecture if belief the ring of airflow if high-pressure air was destroyed into the annular breadth amid two concentric tin cans, one coffee and the added from cat food. This produced a ring of airflow, as expected, but he noticed an abrupt account as well; the breadth of fast affective air presented a array of concrete barrier to the air on either ancillary of it. This effect, which he alleged the "momentum curtain", could be acclimated to allurement high-pressure air in the breadth central the curtain, accouterment lift based on pressure, not airflow. In theory, alone a baby bulk of alive airflow would be bare to actualize lift and abundant beneath than a architecture that relied alone on the drive of the air to accommodate lift, like Frost's Avrocar or a helicopter. In agreement of power, a hovercraft would alone charge amid one division to bisected of the adeptness appropriate by a helicopter.

Cockerell congenital several models of his hovercraft architecture in the aboriginal 1950s, featuring an engine army to draft from the foreground of the adeptness into a atrium beneath it, accumulation both lift and propulsion. He approved the archetypal aerial over abounding Whitehall carpets in foreground of assorted government experts and ministers, and the architecture was after put on the abstruse list. In animosity of active efforts to align allotment no annex of the aggressive was interested, as he afterwards noted, "The Navy said it was a even not a boat; the Air Force said it was a baiter not a plane; and the Army were 'plain not interested'".citation needed

editSR.N1

SR.N1 General Arrangement

This abridgement of aggressive absorption meant that there was no acumen to accumulate the abstraction secret, and it was declassified. Cockerell was assuredly able to argue the National Research Development Corporation to armamentarium development of a all-encompassing model. In 1958 the NRDC placed a arrangement with Saunders Roe for the development of what would become the SR.N1, abbreviate for "Saunders Roe, Nautical 1". The SR.N1 was powered by a 450 hp Alvis Leonides engine powering a vertical fan in the boilerplate of the craft. In accession to accouterment the lift air, a allocation of the airflow was bled off into two channels on either ancillary of the craft, which could be directed to accommodate thrust. In accustomed operation this added airflow was directed aback for advanced thrust, and blew over two ample vertical rudders that provided directional control.

SR.N1 fabricated its aboriginal hover on 11 June 1959, and fabricated its acclaimed acknowledged bridge of the English Access on 25 July 1959. In December, 1959, the Duke of Edinburgh visited Saunders Roe at East Cowes and abiding the arch test-pilot, Commander Peter Lamb, to acquiesce him to yield over the SR.N1's controls. He flew SR.N1 so fast that he was asked to apathetic down a little. On assay of the adeptness afterwards, it was begin that she had been dished in the bow due to boundless speed, accident which was never accustomed to be repaired, and was from again on affectionately referred to as the 'Royal Dent'.7

editSkirts and added improvements

Testing bound approved that the abstraction of application a alone engine to accommodate air for both the lift blind and advanced flight appropriate too abounding trade-offs. A Blackburn Marboré for advanced advance and two ample vertical rudders for directional ascendancy were added, bearing the SR.N1 Mk II. A added advancement with the Armstrong Siddeley Viper produced the Mk III. Added modifications, abnormally the accession of acicular adenoids and ascetic areas, produced the Mk IV.

Although the SR.N1 was acknowledged as a testbed, the architecture hovered too abutting to the apparent to be practical; at 23 cmcitation needed even baby after-effects would hit the bow. The band-aid was offered by Cecil Latimer-Needham. In 1958 he appropriate the use of two rings of elastic to aftermath a double-walled addendum of the vents in the lower fuselagecitation needed. If air was destroyed into the amplitude amid the bedding it exited the basal of the brim in the aforementioned way it aforetime exited the basal of the fuselage, re-creating the aforementioned drive curtain, but this time at some ambit from the basal of the craft.

Latimer-Needham and Cockerell devised a 4 basal (1.22 m) top brim architecture which was adapted to the SR.N1 to aftermath the Mk V,8 announcement badly bigger performance, with the adeptness to ascend over obstacles about as top as the skirtcitation needed. In October 1961, Latimer-Needham awash his brim patents to Westland, who had afresh taken over Saunders Roe's absorption in the hovercraft. Experiments with the brim architecture approved a problem; it was originally accepted that burden activated to the alfresco of the brim would angle it inward, and the now-displaced airflow would could cause it to pop aback out. What in fact happened is that the slight absorption of the ambit amid the walls resulted in beneath airflow, which in about-face led to added air accident beneath that breadth of the skirt. The assembly aloft this breadth would bead due to the accident of lift at that point, and this led to added burden on the skirt.

After ample experimentation, Denys Bliss at Hovercraft Development Ltd. begin the band-aid to this problem. Instead of application two abstracted elastic bedding to anatomy the skirt, a alone breadth of elastic was angled into a U appearance to accommodate both sides, with slots cut into the basal of the U basal the annular vent. If deforming burden was activated to the alfresco of this design, air burden in the blow of the brim affected the close bank to move in as well, befitting the access open. Although there was some anamorphosis of the curtain, the airflow aural the brim was maintained and the lift remained almost steady. Over time, this architecture acquired into alone extensions over the basal of the slots in the skirt, accepted as "fingers".

Passenger-carrying hovercraft, off bank from Ōita Airport

editCommercialisation

With these improvements the new abel hovercraft became an able carriage arrangement for accelerated account on baptize and bank land, arch to boundless developments for aggressive vehicles, seek and rescue, and bartering operations. By 1962 abounding UK aerodynamics and address architecture firms were alive on hovercraft designs, including Saunders Roe/Westland, Vickers-Armstrong, William Denny, Britten-Norman and Folland.9 Small-scale bear account started as aboriginal as 1962 with the barrage of the Vickers-Armstrong VA-3. With the addition of the SR.N4 in 1968, hovercraft had developed into advantageous bartering craft.

Hovercrafts in the Netherlands, newsreel from 1976

Another aloft beat accomplishment of the aboriginal hovercraft era was agitated out by Jean Bertin's close in France. Bertin was an apostle of the "multi-skirt" approach, which acclimated a bulk of abate annular skirts instead of one ample one in adjustment to abstain the problems acclaimed above. During the aboriginal 1960s he developed a alternation of ancestor designs, which he alleged "terraplanes" if they were aimed for acreage use, and "naviplanes" for water. The best accepted of these designs was the N500 Naviplane, congenital for Seaspeed by SEDAM. The N500 could backpack 400 passengers, 55 cars and 5 buses, and operated amid Boulogne to Dover at an boilerplate acceleration of 74 knots (137 km/h).10

Another analysis was that the absolute bulk of air bare to lift the adeptness was a action of the acerbity of the apparent it catholic over. On collapsed surfaces, like pavement, the bare air burden was so low that hovercraft were able to attempt in activity agreement with accepted systems like animate wheels. However, as the hovercraft lift arrangement acted as both a lift and actual able suspension, it by itself lent itself to accelerated use area accepted abeyance systems were advised too complex. This led to a array of "hovertrain" proposals during the 1960s, including England's Tracked Hovercraft and France's Aérotrain. In the U.S., Rohr Inc. and Garrett both took out licenses to advance bounded versions of the Aérotrain. These designs competed with maglev systems in the accelerated arena, area their primary advantage was the actual "low tech" advance they needed. On the downside, the air alarming out from beneath the trains presented a different botheration in stations, and absorption in them waned in the 1970s.

1. Propellers

2. Air

3. Fan

4. Adjustable skirt

By the aboriginal 1970s the basal abstraction had been able-bodied developed, and the hovercraft had begin a bulk of alcove roles area its aggregate of appearance were advantageous. Today they are begin primarily in aggressive use for amphibian operations, seek and accomplishment cars in bank water, and antic vehicles.

Design

Hovercraft can be powered by one or added engines. Small craft, such as the SR.N6, usually accept one engine with the drive breach through a gearbox. On cars with several engines, one usually drives the fan (or impeller), which is amenable for appropriation the car by banishment top burden air beneath the craft. The air inflates the "skirt" beneath the vehicle, causing it to acceleration aloft the surface. Additional engines accommodate advance in adjustment to actuate the craft. Some hovercraft use ducting to acquiesce one engine to accomplish both tasks by administering some of the air to the skirt, the blow of the air casual out of the aback to advance the ability forward

Uses

Commercial

The British aircraft architect Saunders-Roe developed the aboriginal applied man-carrying hovercraft, the SR.N1, which agitated out several analysis programmes in 1959 to 1961 (the aboriginal accessible affirmation in 1959), including a cross-channel analysis run in July 1959 piloted by Peter ("Sheepy") Lamb, an ex-naval analysis pilot and the Chief Analysis Pilot at Saunders Roe. Christopher Cockerell was on board, and the flight took abode on the 50th ceremony of Louis Blériot's aboriginal aeriform crossing.11

The SR.N1 was powered by one (piston) engine, apprenticed by expelled air. Demonstrated at the Farnborough Airshow in 1960,11 it was apparent that this simple ability could backpack a amount of up to 12 Marines with their accessories as able-bodied as the pilot and co-pilot with alone a slight abridgement in hover acme proportional to the amount carried. The SR.N1 did not accept any skirt, application instead the borderline air assumption that Sir Christopher had patented. It was afterwards begin that the craft's hover acme was bigger by the accession of a brim of adjustable bolt or elastic about the aerial apparent to accommodate the air. The brim was an absolute apparatus fabricated by a Royal Navy officer, C.H. Latimer-Needham, who awash his abstraction to Westland (parent aggregation of Saunders-Roe), and who formed with Sir Christopher to advance the abstraction further.

The aboriginal passenger-carrying hovercraft to access account was the Vickers VA-3, which in the summer of 1962 agitated cartage consistently forth the arctic Wales Coast from Moreton, Merseyside, to Rhyl. It was powered by two turboprop aero-engines and apprenticed by propellers.citation needed

In Britain, the RNLI accomplish a baby agile of hovercraft lifeboats

The Hovertravel account amid the Isle of Wight and acreage England is currently the alone accessible hovercraft account in the United Kingdom

During the 1960s Saunders-Roe developed several beyond designs which could backpack passengers, including the SR.N2, which operated beyond the Solent in 1962 and afterwards the SR.N6, which operated beyond the Solent from Southsea to Ryde on the Isle of Wight for abounding years. In 1963 the SR.N2 was acclimated on an alpha account amid Weston-super-Mare and Penarth beneath the advocacy of P & A Campbell, the paddle steamer operators.

Operations by Hovertravel commenced on July 24, 1965 application the SR.N6 which agitated just 38 passengers.11 Two 98 bench AP1-88 hovercraft were alien on this avenue in 1983, and in 2007 these were abutting by the aboriginal 130 seater BHT130 craft. The AP1-88 and the BHT130 were notable as they were abundantly congenital by Hoverwork application shipbuilding techniques/materials (i.e. anchored aluminium anatomy and agent engines) rather than the aircraft techniques acclimated to body the beforehand ability congenital by Saunders-Roe/British Hovercraft Corporation. Over 20 actor cartage had acclimated the account as of 2004 – the account is still operating (2010) and is by far the longest, continuously operated hovercraft service.

In 1966, two cross-channel commuter hovercraft casework were inaugurated application SR.N6 hovercraft. Hoverlloyd ran casework from Ramsgate Harbour, England, to Calais, France, and Townsend Ferriescitation needed aswell started a account to Calais from Dover, which was anon abolished by that of Seaspeed.

As able-bodied as Saunders-Roe and Vickers (which accumulated in 1966 to anatomy the British Hovercraft Corporation (BHC)), added bartering ability were developed during the 1960s in the UK by Cushioncraft (part of the Britten-Norman Group) and Hovermarine based at Woolston (the closing getting 'Sidewall Hovercraft', breadth the abandon of the bark projected down into the baptize to allurement the beanbag of air with 'normal' hovercraft skirts at the bow and stern). One of these models, the HM-2, was acclimated by Red Funnel amid Southampton (near the Woolston Floating Bridge) and Cowes.12

The world's aboriginal car-carrying hovercraft was fabricated in 1968, the BHC Mountbatten chic (SR.N4) models, anniversary powered by four Rolls-Royce Proteus gas agent engines. These were both acclimated by battling operators Hoverlloyd and Seaspeed to accomplish approved car and commuter accustomed casework beyond the English Channel. Hoverlloyd operated from Ramsgate, breadth a appropriate hoverport had been congenital at Pegwell Bay, to Calais. Seaspeed operated from Dover, England, to Calais and Boulogne in France. The aboriginal SR.N4 had a accommodation of 254 cartage and 30 cars, and a top acceleration of 83 kn (154 km/h). The Approach bridge took about 30 account and was run rather like an airline with flight numbers. The afterwards SR.N4 Mk.III had a accommodation of 418 cartage and 60 cars to the Isle of Wight . These were afterwards abutting by the French-built SEDAM N500 Naviplane with a accommodation of 385 cartage and 45 cars; alone one entered account and was acclimated intermittently for a few years on the cross-channel account until alternate to SNCF in 1983. The account accomplished in 2000 afterwards 32 years, due to antagonism with acceptable ferries, catamaran, the dematerialization of duty-free arcade aural the EU and the advancing age of the SR.N4 hovercraft and the aperture of the Approach Tunnel.

The bartering success of hovercraft suffered from accelerated rises in ammunition prices during the backward 1960s and 1970s afterward battle in the Middle East. Addition over-water cars such as wave-piercing catamarans (marketed as the SeaCat in the UK until 2005) use beneath ammunition and can accomplish a lot of of the hovercraft's abyssal tasks. Although developed abroad in the apple for both civilian and aggressive purposes, except for the Solent Ryde to Southsea crossing, hovercraft abolished from the bank of Britain until a ambit of Griffon Hovercraft were bought by the Royal National Lifeboat Institution.

A advance blaze administration in Bavaria application a hovercraft to convenance a rescue

editCivilian non-commercial

In Finland, baby hovercraft are broadly acclimated in amphibian accomplishment and during the rasputitsa ("mud season") as archipelago communication vehicles. In England, hovercraft of the Burnham-on-Sea Breadth Accomplishment Boat (BARB) are acclimated to accomplishment humans from blubbery mud in Bridgwater Bay. Avon Blaze and Accomplishment Account became the aboriginal Local Authority blaze account in the UK to accomplish a hovercraft. It is acclimated to accomplishment humans from blubbery mud in the Weston-super-Mare breadth and during times of civil flooding. A Griffon accomplishment Hovercraft has been in use for a amount of years with the Airport Blaze Account at Dundee Airport in Scotland. It is acclimated in the accident of an aircraft ditching in the Tay estuary. Numerous blaze departments about the U.S./Canadian Great Lakes accomplish hovercraft for baptize and ice rescues, generally of ice fisherman alone if ice breach off from shore.

In October 2008 The Red Cross commenced a flood-rescue account hovercraft based in Inverness, Scotland.13 Gloucestershire Blaze and Accomplishment Account accustomed two flood-rescue hovercraft donated by Severn Trent Baptize afterward the 2007 UK floods.14

Since 2006 hovercraft accept been acclimated in aid in Madagascar by HoverAid, an all-embracing NGO who use the hovercraft to ability the a lot of limited places on the island.15 The Scandinavian airline SAS acclimated to allotment an AP1-88 hovercraft for approved cartage amid Copenhagen Airport, Denmark, and the SAS Hovercraft Terminal in Malmö, Sweden.

In 1998, the US Postal Account began application the British congenital Hoverwork AP1-88 to booty mail, freight, and cartage from Bethel, Alaska, to and from eight baby villages forth the Kuskokwim River. Bethel is far removed from the Alaska alley system, appropriately authoritative the hovercraft an adorable addition to the air based supply methods acclimated above-mentioned to addition of the hovercraft service. Hovercraft account is abeyant for several weeks anniversary year while the river is alpha to benumb to abbreviate accident to the river ice surface. The hovercraft is able to accomplish during the freeze-up period; however, this could potentially breach the ice and actualize hazards for villagers application their snowmobiles forth the river during the aboriginal winter.

In 2006 Kvichak Abyssal Industries of Seattle USA built, beneath license, a cargo/passenger adaptation of the Hoverwork BHT130. Appointed 'Suna-X', it is acclimated as a top acceleration bear for up to 47 cartage and 47,500 pounds of bales confined the limited Alaskan villages of King Cove and Cold Bay.

An alpha account was operated in Scotland beyond the Firth of Forth (between Kirkcaldy and Portobello, Edinburgh), from 16 to 28 July 2007. Marketed as Forthfast, the account acclimated a ability accountant from Hovertravel and accomplished an 85% commuter amount factor. As of 2009 the achievability of establishing a abiding account is still beneath consideration.16dead link

Since the approach routes alone hovercraft, and awaiting any reintroduction on the Scottish route, the United Kingdom's alone accessible hovercraft account is that operated by Hovertravel amid Southsea (Portsmouth) and Ryde on the Isle of Wight.

From the 1960s, several bartering curve were operated in Japan, afterwards abundant success. In Japan the endure bartering band had affiliated Ōita Airport and axial Ōita but was shut down in October 2009.

A U.S. Navy Landing Ability Air Cushion, an archetype of a aggressive hovercraft

Hovercraft are still bogus in the UK abreast to breadth they were aboriginal conceived and activated and the Isle Of Wight. They can aswell be accountant for a avant-garde array of uses including inspections of bank bed adopted wind farms and VIP or commuter use. A archetypal barge would be a Tiger IV or a Griffon. They are light, fast, alley carriageable and absolute adjustable with the altered affection of minimising accident to environments.

editMilitary

See also: Air-cushioned landing craft

First applications of the hovercraft in aggressive use was with the SR.N1 through SR.N6 ability congenital by Saunders-Roe in the Isle of Wight in the UK and acclimated by the UK collective forces. To analysis the use of the hovercraft in aggressive applications the UK set up the Interservice Hovercraft Trials Assemblage (IHTU) abject at Lee-on-the-Solent (now the website of the Hovercraft Museum). This assemblage agitated out trials on the SR.N1 from Mk1 through Mk5 as able-bodied as testing the SR.N2, SR.N3, SR.N5 and SR.N6 craft. Currently the Royal Marines use the Griffon 2000 TDX Chic ACV as an operational craft. The 2000 was deployed by the UK in Iraq.

In the US, during the 1960s, Bell licenced and awash the Saunders-Roe SR.N5 as the Bell SK-5. They were deployed on balloon to the Vietnam War by the United States Navy as PACV convoying ability in the Mekong Basin breadth their advancement and acceleration was unique. This was acclimated in both the UK SR.N5 arced accouter agreement and afterwards with adapted collapsed deck, gun turret and armament launcher appointed the 9255 PACV. The United States Army aswell experimented with the use of SR.N5 hovercraft in Vietnam. Three hovercraft with the collapsed accouter agreement were deployed to Dong Tam in the Mekong basin arena and afterwards to Ben Luc. They saw activity primarily in the Plain of Reeds. One was destroyed in aboriginal 1970 and addition in August of that aforementioned year afterwards which the assemblage was disbanded. The alone absolute U.S. Army SR.N5 hovercraft is currently on affectation in the Army Carriage Museum in Virginia. Experience led to the proposed Bell SK-10 which was the base for the LCAC-class air-cushioned landing ability now deployed by the U.S. and Japanese Navy.

The Soviet Union was the world's better developer of aggressive hovercraft. Their designs ambit from the baby Czilim chic ACV, commensurable to the SR.N6, to the aberrant Zubr chic LCAC, the world's better hovercraft. The Soviet Union was aswell one of the aboriginal nations to use a hovercraft, the Bora, as a guided missile corvette, admitting this ability bedevilled rigid, non-inflatable sides. With the abatement of the Soviet Union a lot of Soviet aggressive hovercraft fell into decay and disrepair. Alone afresh has the avant-garde Russian Navy amorphous architecture new classes of aggressive hovercraft.

The Finnish Navy advised an alpha missile advance hovercraft class, Tuuli chic hovercraft, in the backward 1990s. The ancestor of the class, Tuuli, was commissioned in 2000. It accepted an acutely acknowledged architecture for a bank fast advance craft, but due to budgetary affidavit and doctrinal change in the Navy, the hovercraft was anon withdrawn.

The Hellenic Navy operates four Russian-designed Zubr chic LCAC. This is the world’s better aggressive air-cushioned landing craft.

The People's Army Navy of China operates the Jingsah II chic LCAC. This troop and accessories accustomed hovercraft is almost the Chinese agnate of the U.S. Navy LCAC.

editRecreational/sport

Coastal Cruising

Small commercially manufactured, kit or plan-built hovercraft are added getting acclimated for recreational purposes such as civil antagonism and canoeing on civil lakes and rivers, littoral areas, estuaries and inshore littoral waters.17

The Hovercraft Canoeing Club 18 is committed to encouraging, acknowledging and developing the safe & accommodating operation of recreational canoeing hovercraft. It organises training, breezy hover-events, and offers world-class hovercraft architecture tools, admonition on safe operation, affiliate discounts and ability insurance. It has an alive and advisory club affiliate forum.

The Hovercraft Club of Great Britain, founded in 1966, consistently organizes civil and littoral hovercraft chase contest at assorted venues beyond the United Kingdom.19

Single seater antagonism hovercraft

In August 2010 the Hovercraft Club of Great Britain hosted the Apple Hovercraft Championships at Towcester Racecourse 20 The Apple Hovercraft Championships are run beneath the advocacy of the Apple Hovercraft Federation.21 Agnate contest are aswell captivated in Europe and the US.2223

editOther

editHoverbarge

A absolute account of air beanbag cars in affective abundant endless over difficult terrain, such as swamps, was disregarded by the activity of the British Government allotment to advance accelerated hovercraft. It was not until the aboriginal 1970s that the technology was acclimated for affective a modular abyssal barge with a dragline on lath for use over bendable reclaimed land.

Mackace (Mackley Air Beanbag Equipment), now accepted as Hovertrans, produced a amount of acknowledged Hoverbarges, such as the 250 ton burden “Sea Pearl” which operated in Abu Dhabi and the accompanying 160 ton burden "Yukon Princesses" which alien trucks beyond the Yukon river to aid the activity build. Hoverbarges are still in operation today. In 2006, Hovertrans (formed by the aboriginal managers of Mackace) launched a 330 ton burden conduct barge in the swamps of Suriname.

The Hoverbarge technology is somewhat altered from accelerated hovercraft, which has commonly been complete application aircraft technology. The antecedent abstraction of the air beanbag barge has consistently been to accommodate a low-tech amphibian band-aid for accessing architecture sites application archetypal accessories begin in this area, such as agent engines, ventilating fans, winches and abyssal equipment. The amount to move a 200 ton burden ACV barge at 5 kn (9.3 km/h) would alone be 5 tons. The brim and air administration architecture on the accelerated ability afresh is added circuitous as they accept to cope with the air beanbag getting done out by a beachcomber and beachcomber impact. The apathetic acceleration and ample address alcove of the hover barge in fact helps abate the aftereffect of beachcomber activity giving a absolute bland ride.

editHovertrains

Several attempts accept been fabricated to accept air beanbag technology for use in anchored clue systems, in adjustment to advance the lower frictional armament for carrying top speeds. The a lot of avant-garde archetype of this was the Aérotrain, an alpha top acceleration hovertrain congenital and operated in France amid 1965 and 1977. The activity was alone in 1977 due to abridgement of funding, the afterlife of its advance architect and the acceptance of TGV by the French government as its accelerated arena carriage solution.

A analysis clue for a tracked hovercraft arrangement was congenital at Earith abreast Cambridge, England. It ran southwest from Sutton Gault, sandwiched amid the Old Bedford River and the abate Counter Drain to the west. Careful assay of the website will still acknowledge traces of the accurate piers acclimated to abutment the structure. The absolute vehicle, RTV31, is preserved at Railworld in Peterborough24 and can be apparent from trains, just south west of Peterborough railway station. The car accomplished 104 mph (167 km/h) on 7 February 197325 but the activity was annulled a anniversary later. The activity was managed by Tracked Hovercraft Ltd., with Denys Bliss as Director in the aboriginal 1970s, alone to be axed by the Aerospace Minister, Michael Heseltine. Records of this activity are accessible from the accord and affidavit of Sir Harry Legge-Bourke, MP at Leeds University Library.26 Heseltine was accused by Airey Neave and others of ambiguous the House of Commons if he declared that the government was still because giving banking abutment to the Hovertrain, if the accommodation to cull the bung had already been taken by the Cabinet.

Despite able aboriginal results, the Cambridge activity was alone in 1973 due to banking constraints, but locations of the activity were best up by the engineering close Alfred McAlpine, alone to be assuredly alone in the mid 1980s. The Tracked Hovercraft activity and Professor Laithwaite's Maglev alternation arrangement were contemporaneous, and there was acute antagonism amid the two -to-be British systems for allotment and credibility.

At the added end of the acceleration spectrum, the Dorfbahn Serfaus has been in connected operation back 1985. This is an abnormal underground air beanbag funicular accelerated alteration system, anchored in the Austrian ski resort of Serfaus. Alone 1,280 m (4,200 ft) long, the band alcove a best acceleration of 25 mph (40 km/h). A agnate arrangement aswell exists in Narita All-embracing Airport abreast Tokyo, Japan.

In the backward 1960s and aboriginal 1970s the U.S. Administration of Transport's Urban Mass Alteration Administration adjourned several hovertrain projects which were accepted as Tracked Air Beanbag Cars or TACVs. They were aswell accepted as Aerotrains back one of the builders had a licence from Bertin's Aerotrain company. Three abstracted projects were funded. Research and development was agitated out by Rohr, Inc., Garrett AiResearch and Grumman. The UMTA congenital an all-encompassing analysis website in Pueblo, Colorado, with altered types of advance for the altered technologies acclimated by the ancestor contractors. They managed to body prototypes and do a few analysis runs afore the allotment was cut.

editNon-transportation

The Hoover Constellation was a all-around canister-type exhaustion cleaner notable for its abridgement of wheels. Floating on a beanbag of air, it was a calm hovercraft. They were not abnormally acceptable as exhaustion cleaners as the air artifice from beneath the beanbag blew uncollected dust in all directions, nor as hovercraft as their abridgement of a brim meant that they alone hovered finer over a bland surface. Despite this, aboriginal Constellations are approved collectibles today.

The Flymo is an air-cushion backyard mower which uses a fan on the cutter brand to accommodate lift. This allows it to be confused in any direction, and provides double-duty as a mulcher.

Preservation

Lee-on-the-Solent, Hampshire, England, is the home to the Hovercraft Museum which houses the world's better accumulating of hovercraft designs, including some of the ancient and largest. Much of the accumulating is housed aural two retired SR.N4 hovercraft, and abounding hovercraft in the accumulating are operational.

Hovercraft are still in use amid Ryde on the Isle of Wight and Southsea on the mainland. The service, operated by Hovertravel, runs abounding times an hour and is the fastest way of accepting on or off the island. Large commuter hovercraft are still bogus on the Isle of Wight.

Records

World's Better Civil Hovercraft27 - The BHC SR.N4 Mk.III, at 56.4 m (185 ft) breadth and 310 metric bags (305 continued tons) weight, can board 418 cartage and 60 cars.

World's better aggressive hovercraft - The Russian Zubr chic LCAC at 57.6 meters breadth and a best displacement of 535 tons. This hovercraft can carriage three T-80 capital action tanks (MBT), 140 absolutely able troops, or up to 130 bags of cargo. Four accept been purchased by the Greek Navy.

English Channel bridge - 22 account by Princess Anne MCH SR.N4 Mk.III on September 14, 1995

World's Hovercraft Speed Record28 - September 18, 1995 - Speed Trials, Bob Windt (USA) 137.4 km/h (85.87 mph), 34.06 secs abstinent kilometre

Longest connected use - The aboriginal ancestor SR.N6 Mk.I (009) was in account for over twenty years, and logged a arresting 22,000 hours of use. It is currently on affectation at the Hovercraft Museum in Lee-on-the-Solent, Hampshire, England.