30 January, 2012

How does a hovercraft work?


Although often seen as a mysterious, even bizarre mode of transportation, it is conceptually quite simple. To understand how hovercraft work, it is necessary to realize that the dynamics are more closely related to aircraft than to boats or automobiles. 


As a member of the family of air cushion vehicles (ACVs) or ground effect machines, which includes wing-in-ground-effect or ram wings, surface effect ships, sidewall hovercraft, and surface skimmers, hovercraft, are the amphibious member of the air cushion vehicle family. They are the most novel among vehicles that are supported by pressurized air …


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16 January, 2012

History of the Hovercraft


A hovercraft is a flying machine, a type of air cushion vehicle. When it comes to flying machines, ideas easily date back to ancient Greece. This is not the case with air cushion vehicles.

The first recorded design for such a vehicle was in 1716 by Emanuel Swedenborg, a Swedish designer, philosopher and theologian. Swedenborg's design appeared in the fourth edition of Sweden's first scientific journal, Daedulus Hyperboreus, and is the first detailed technical description of a flying machine of any type.

Swedenborg's man-powered air cushion platform, basically a circular aircraft, resembled an upside-down boat with a cockpit in the center or a "flying saucer." His manually-operated device required the would-be pilot to use oar-like scoops to push air under the vehicle on each downward stroke in order to raise the hull out of the water. A working model of the design was never built, because Swedenborg soon realized that a human could not sustain the energy needed to power the oars. His concept required a source of energy far greater than any available at that time.

As with many other forms of transportation, significant progress had to wait until a lightweight motor was developed in the nineteenth century …

Read the full History of the Hovercraft, from 1700 to the present day …

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03 January, 2012

Exactly what is a hovercraft?


A hovercraft is one of the children of the air cushion vehicle (ACV) family that flies above the earth's surface on a cushion of air. It is powered by an engine that provides both the lift cushion and the thrust for forward or reverse movement. The hovercraft child is a true multi-terrain, year-round vehicle that can easily make the transition from land to water because it slides on a cushion [bubble] of air with the hovercraft skirt slightly brushing the surface.

To learn more about hovercraft, read Hovercraft Q&A …

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11 December, 2011

Neoteric Trains Hovercraft Pilots in Hong Kong

Neoteric Hovercraft pilot training instructors Chris Fitzgerald and Steve Stafford recently traveled to Hong Kong to conduct six days of challenging hovercraft pilot training for firefighters from the Hong Kong Fire Services Department in their new 6-passenger rescue Hovertrek.

Their hovercraft is based at the Sheung Shui Fire Station where more than 75 firefighters are stationed. This northern region of Hong Kong suffers frequent flooding due to typhoons and rainstorm “Black Warnings.” Because of this, the area has quite a sophisticated storm water management system consisting of narrow engineered drainage channels with highly elaborate controls. These channels feature walkways, ramps, service platforms, inflatable dams and even bike trails and rest areas for the public.
Aerial view of the Ng Tung River near Tin Ping Shan, where flight training was conducted. 
Hands-on flight training for the firefighters took place in one of these drainage channels of the Ng Tung River near Tin Ping Shan.
At the start of hands-on flight training, Stafford and Fitzgerald show the second group of student pilots how to remove the hovercraft from its trailer and to conduct a pre-flight inspection.


A major challenge was that the channel, at 40 yards wide, offered insufficient width to perform many of the standard pilot training maneuvers. In addition, the 4-feet deep channel, with its 45-degree concrete walls and stairways every 200 yards with stainless steel chain railings, provided a forbidding number of opportunities for hovercraft impacts.
In the narrow channel, Fitzgerald instructs firefighter Lai Wa in slow speed maneuvering and backing up.
It rained continually for nearly half of the six days of training but the Fire Services craft, shown below in Indiana before shipment to Hong Kong, is equipped with a cabin that was removed for fair weather training days ...
 
The Neoteric hovercraft joins the sophisticated apparatus of a fire station with all the latest rescue equipment, such as new ladder trucks from Sweden, modern ambulances and BMW performance motorcycles equipped for paramedics.

Hong Kong is tremendously efficient and its government demands the highest standards for all purchases. Before their new hovercraft could be shipped, officials from the Government of Hong Kong, the Hong Kong Fire Department, and China Pacific Marine, Ltd. (Neoteric's Hong Kong agent) visited Neoteric in Indiana USA to conduct stringent performance evaluations on the craft.  

Hong Kong is the ideal environment for the unique capabilities of the hovercraft. Rivers, canals, channels, drainage ditches, estuaries and fish farms proliferate and there is an enormous number of islands and beaches, as well as vast barge and ship traffic.