8 Seater Inflatable Speed Boat Powersport Now for the first time available ready stock delivered at your door any place .

Last Updated on Sunday, 30 May 2010 09:01 Thursday, 27 May 2010 15:25

Written by Manoj Agarwal

PSIB8   INFLATABLE  SPEED BOAT  8 SEATER

An inflatable boat is a lightweight boat constructed with its sides and bow made of flexible tubes containing pressurised gas. For smaller boats, the floor and hull beneath it is often flexible. On boats longer than 3 metres/10 feet, the floor often consists of three to five rigid plywood or aluminum   sheets fixed between the tubes but not joined rigidly together. Often the transom is rigid, providing a location and structure for mounting an outboard motor.
Some inflatable boats have been designed to be disassembled and packed into in a small volume, so they can easily stored and transported to water when needed. Here the boat when inflated is kept rigid crossways by a foldable removable thwart. This feature allows such boats to be used as for larger boats or aircraft, and for travel or recreational purposes

Type

PVC inflatable with small electric trolling motor
Inflatable boats may have rubber floors, either plain or inflatable, or they may include steel, wood or aluminium sheets for rigidity. The tubes are made of rubberised, synthetic sheets of Hypalon or PVC to provide light-weight and secure buoyancy. The tubes are often constructed in separate sections, each with a valve to add or remove air, to reduce the effect of a puncture.
Some inflatable boats have an inflated keel to create a "groove" along the line of the hull improving the hull's wave cutting and turning performance. Due to the lightness, it is easy to cause an inflatable boat to start hydroplaning, thus making it faster than the engine would allow when the hull is operating in displacement mode.
A growing use for inflatables is for white water rafting and kayaking, as well as in river, lake and ocean touring. Professional-level rafts and kayaks have existed for many years; since the late 1990s, more affordable inflatable rafts, kayaks (including sea kayaks) and canoes have been developed by European and North American companies. Typically these inflatable boats contain no rigid frame members, so they can be deflated, folded and stored in compact bags.


Repairing

Should a section puncture it can be repaired while still underway. More extensive inflatable boat repairs - due to pinholes, punctures, peeling, leaks or worn fabric - can be done in dry dock using two-stage synthetic rubber coatings (SRC).
Subject to a great deal of wear and tear from the elements - both water and sun - inflatable boats are often replaced when they could be restored or even repaired. Products that aggressively adhere to the damaged Hypalon or PVC shell can fix virtually any surface damage through a unique chemical bonding between the undercoat and topcoat that permanently vulcanizes the two rubber coatings together to make the inflatable as good as new. However since the Hypalon material increases the cost of the inflatable up to 15% not all manufactures provide the option. Some, such as the Brig and the Zodiac brand inflatable boat offer the option between the PVC or the Hypalon which is recommended for environments of increase heat and sunlight.

Uses
Main articles: Dive boat, Lifeboat (shipboard), and Lifeboat (rescue)
See also: Combat Rubber Raiding Craft, D class lifeboat, IB1 class lifeboat, Arancia class, XP class lifeboat, X class lifeboat, Y class lifeboat, Ship's tender, and Luxury yacht tender

An inflatable boat with 2 passengers and a dog
Inflatables are commonly between 2 and 7 metres (6 to 21 feet) long and are propelled by outboard motors of 2.3 to 300 horsepower (1.8 to 225 kW). Due to their speed, portability and weight, inflatable boats are used in diverse roles:
Inflatable and rigid-hulled inflatable boats are often used for short scuba diving excursions.[1][2]
When employed as life saving equipment, they should comply to the regulations set out by the SOLAS. Some life rafts also contain additional inflatable section to ensure that the raft will self righten in heavy seas.[3]
Inflatable life rafts have also been used since the 1930s on military aircraft that operate over water

German soldiers crossing the Meuse in an inflatable boat during the Second World War
These boats are often used by special-operations units of the armed forces of several nations, for such purposes as landing on beaches. Due to the fact that inflatable craft can be stored compactly they can also be transported on midget submarines such as those operated by the Advanced SEAL Delivery System. They have also be used by special operations soldiers without government sponsorship, such as guerrillas, pirates[5], and terrorists.
Lifeguards use inflatable boats or jet skis in order to reduce the time required to reach a swimmer in distress.
Inflatables are also used in conjunction with larger rescue craft such as the Y class lifeboat used with the Tamar and Severn class lifeboats.

Offshore inflatable racing (Thundercat class) at Ilfracombe, north Devon, England. These boats can reach 100 km/h (60 mph).
They are used in a number of sporting events and for recreational purposes, such as Whitewater rafting, Inflatable Rescue Boat Racing, water skiing, Fishing
Although rigid boats are more employed, some cruise ships and luxury yachts use inflatable boats as a tender.


History
Early attempts.

Inflated Pigskin Raft - India

A rubber coated fabric bridge pontoon

An inflatable rubber boat, circa 1855

The Nonpariel inflatable boat
There are ancient carved images of animal skins filled with air being used as one-man floats to cross rivers. They were inflated by mouth. Sometimes these images have been wrongly described as ancient scuba.
The discovery of the process to vulcanize rubber was made by Charles Goodyear, in 1838. Vulcanization stabilized the rubber allowing it to be both durable and flexible. Shortly thereafter several people expanded on experimentation of rubber coated fabrics.
In 1839 the Duke of Wellington tested the first inflatable pontoons.
In 1844 - 1845, British naval officer Lieutenant Peter Halkett developed two types of inflatable boats intended for use by Arctic explorers. Both were made of rubber-impregnated "Mackintosh cloth." The "boat cloak" served as a waterproof poncho or cloak until inflated, when it became a one-man boat. A special pocket held bellows for inflation, and a blade to turn a walking stick into a paddle. A special umbrella could double as a sail. Halkett also developed a two man boat which was carried in a knapsack, and could also serve as a waterproof groundsheet. Halkett's boats were used extensively for Arctic exploration, including several of the expeditions mounted to search for Sir John Franklin's lost expedition. [6]
In 1848 General George Cullum, U.S. Army Corps of Engineers, introduced a rubber coated fabric inflatable bridge pontoon which was used in the Mexican-American War and later on to a limited extent during the American Civil War.[7]
By 1855 there were numerous types of inflatable rubber boats in use, some made by Goodyear in the U.S. and other surprisingly modern looking boats by the Thomas Hancock Company in Britain.
The U.S. Navy was using inflatable life rafts by 1863 onboard the armored ironclad warships of the Passaic Monitor class.
In 1866 four men crossed the Atlantic Ocean from New York to Britain on a three tube raft called Nonpariel.[8]
In 1900 to 1910 the development of rubber manufacturing enabled attempts at producing circular rubber inflatable boats: similar to modern coracles. These were only usable as rafts and could be propelled only by paddling, and they tended to crack at seams and folds due to imperfect manufacture of the rubber.
The Titanic and WWI
With the loss of the RMS Titanic in 1912, and World War I losses of ships to submarine-launched torpedoes, the need for inflatable boats was plain.
One cause of the loss of life on the Titanic was the lack of lifeboats. Even if every lifeboat had been completely filled with passengers and crew, there would have been no way to rescue more than half of all the people on board. The first SOLAS treaty was designed to avoid such a disaster happening again. One of its provisions was to ensure that vessels had enough lifeboats to provide every person aboard the vessel with a place. Putting this rule into effect was not difficult with cargo ships: they had small crews and plenty of deck space. Passenger ships had to stack lifeboats on top of each other to able to carry enough to accommodate the large number of passengers and crew. Warships also had large crews and little deck space.
Between the two World Wars, Goodyear found a way to join rubber to other materials. They made life rafts of square-shaped inflated rubber tubes with a rigid floor. Such rafts were to be stacked vertically aboard warships, usually standing on deck and leaning against deck-houses. But conservative thinking from navies held back this new idea.[neutrality is disputed]
Pierre Debroutelle's 1937 design was the first known to have its inflatable tube in a U-shape. It was the first boat of its kind to be certified by the French Navy. Its added wooden transom was patented on 10 August 1943. This version was the predecessor of today's inflatable sports and pleasure boats.

World War II