Jeremy Clarkson operating the Neptune 11.

The Neptune 11 is a hovercraft produced by Russian hovercraft company, Neptune Hovercraft and was featured in Top Gear Series 22 Episode 1 and was driven by Jeremy Clarkson in the St. Petersburg race, in which the Neptune 11 finished second, beating St. Petersburg public transport and a bicycle, only to be beaten by a Renault Twizy.


From Neptune's website
  • Length - 8.2 m
  • Beam - 4.1 m
  • Height (Passenger Compartment) - 1.6 m
  • Obstacle Clearance - 0.5 m
  • Passengers - 23
  • Crew - 1
  • Payload - 1.05 tonnes
  • Endurance - 13 hours
  • Fuel consumption - 21 litres/hour
  • Operation speed - 25 knots (~29 mph)
  • Maximum speed (water) - 45 knots (~52 mph)
  • Maximum speed (ice) - 50 knots (57.5 mph)
  • Engine type - 2 Petrol engines, 72 horsepower each
  • Temperature limits - -30 +40C
  • Maximum wave height - 1.2 m

General information

High-speed amphibious hovercraft NEPTUNE 11 is designed to carry 1,000 kg of cargo or up to 11 passengers. The vessel provides a year-round operation on the rivers, lakes and coastal seas and reservoirs in direct sight of land. Hovercraft is based on modern combined propulsion and blower set. Hovercraft is equipped with a variable pitch propeller (VISH), two modern internal combustion engines, flexible fencing EP like "skirt". NEPTUNE Hovercraft 11 is a modernized version of the boat NEPTUNE 10 boats capacity has increased to 11 people, the height of the air cushion (clearance) has grown to 50 cm, were electric amplifiers VISH instead of mechanical.


The case riveted, typed on a mixed set of system. As a set of profile hire used. Housing material - high-strength corrosion resistant aluminum alloy AMg5M.

Structurally hovercraft body consists of two separated by watertight compartment blower VP pontoon, interconnected and overlapping of the bottom set of continuous longitudinal sides. Housing hovercraft has fore and aft with a rounded undercuts in terms of the shape of the nasal tip and square stern. The strength of the housing meets the requirements of the PPP Regulation.

The body is divided into five compartments: forepeak, saloon-cabin, fuel, blower, motor. All compartments other than discharge, waterproof. The role of after-peak to the ship performs aft buoyancy tank. Hovercraft unsinkable zatoplnenii at any one of the watertight compartments.

Along the whole length of the hull mounted removable side sections that are tough part of the GO of the receiver and provide a passage along the vessel, as well as oversized cargo placement.


The superstructure is made by the type of "sandwich" composed of reinforced fiberglass shell and insulation priformovannogo it. Access to the forepeak is via a hatch in the bow part of the superstructure. Entrance to the cabin is via reclining doors port and starboard. Hatches and doors are equipped with locking devices.

The cabin provides the windshield like "triplex" with wipers and blowing heated air. The side windows are made of organic glass.

On both sides of the hovercraft located the lifting seat-lockers. Centered between sidenmi possible to install the table. The aft cabin one lifting seat is installed. Salon has the ability to transform from a sitting option in an option with sleeping 2000h1800 mm.

The bow cabin has two seats with the possibility of adjustment. Opposite skipper seat is remote control, launch motors, control systems and operation mechanisms.

Heating salon provided by two heaters of different engines.

The engine and transmission.

The two petrol injection VAZ-21124, chetyrehtaktyh, inline four-cylinder with a vertical arrangement of cylinders installed as the main engines on the hovercraft. To increase the life of engines and reduction of fuel consumption of the engine power is reduced to 80 hp by reducing the maximum speed. To control the operation of the engine in the control panel are installed on-board computers of type Multitronics.

The engines are installed in the engine compartment along the port and starboard. Each engine has its own independent power supply and cooling system. Each engine hinged mechanisms of transmission consisting of belt units and drive shafts. Transmission of the left and right sides independently transmit the rotation to the air-cushion blowers and propellers of his board. This quality allows you to create an artificial roll by varying the compressor speed VP, and continue to operate and move the hovercraft when leaving any part of the transmission or engine failure.

Flexible fencing air cushion (GO).

On hovercraft adopted bunk flexible protection scheme with a flexible receiver in the top tier and removable elements at the bottom (a type of "skirt"). Height VP - 0.5 meters. The area of ​​the air bag is partitioned in a "cross", forming four zones. Create different pressure zones under the hull allows the boat apply bank, as well as to restore the horizontal position of the vessel after the impact of negative phenomena.

 Driving GOKazhduyu second supercharger VP delivers pressurized air into the receiver, which, through a plurality of holes directs it to removable elements. Further, the air exits through the edge between the removable element and the surface.

This scheme allows you to keep the receiver and removable elastic elements. Those. With the passage of obstacles flexible elements are rejected and passed under the object is not a trying to "break" him.

Because upper tier does not contact with the surface, its wear is minimal. In contact with the lower surface of the segment play only tier which consists of a plurality of independent elements. Each element is attached to the receiver with four bolts. Replacement is simple and requires no special skills. Thanks to the constant flow of air in the EP, DPP will retain the possibility of movement of the hovercraft, even with the loss of 100% removable elements and significant damage to the receiver.

GO Material - rubberized fabric based on nylon rubber. This fabric allows you to deal and take a predetermined shape at low temperatures.

Variable pitch propeller (VISH).

two variable-pitch propeller in aerodynamic nozzles installed on the hovercraft. Can multidirectional work VIShey port and starboard, to provide a control point with the center of rotation in the stern area. Propeller blade can be locked in the desired position, which will allow the hovercraft to move forward or backward, as well as hang on the spot.

For the screws on the aerodynamic nozzles ustanoleny blocks air rudders. Air wheels provide a control point in the nose area.


Hovercraft is equipped with a ballast system diferentovaniya, of inclination of the sensor, amplifiers VISH, sprinkler system, life jackets, anchor and more.

On request is possible to manufacture and installation of additional fuel and cargo boxes, installation of navigation systems, radar, starting preheaters, MSP and other equipment.

See AlsoEdit

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