Hovercraft

FIELD: transport.

SUBSTANCE: hovercraft comprises displacement hull with V-shaped bottom, central ski with transverse steps and lengthwise steps. The latter are arranged at vessel fore. Note here that bottom incorporates extra cleats extending from edges to mid point. Lengthwise steps are hollow and through design.

EFFECT: higher speed and mobility.

2 cl, 3 dwg

 

The invention relates to shipbuilding and can be used in the design, construction and operation of ships with air bag.

Known displacement monohull vessels with sharp shells, which are characterized by poor lateral stability. To ensure the stability of the vessel when further increasing the ratio of body length to width for the purpose of increasing speed and seaworthiness has to skip to the Multihull circuit (Dag pike. Magazine "Boats and yachts" No. 2/1990, pp. 44-49).

Known vessel according to patent RU 2254250 from 22.07.2002. The wig has a center section made with an aerodynamic profile in the longitudinal cross-sections. Cigar-shaped fuselage of the airplane is mounted on the center section. The cockpit and passenger cabin are located in the fuselage. Hollow hermetical longitudinal beams mounted on the periphery of the wing section at its ends. Inflatable shock-absorbing cylinders are mounted under the longitudinal beams. Two keel with rudder direction is installed on the wingtips of the longitudinal beams. Horizontal tail is located on the fins and includes the area between the keels the Elevator, and on the peripheral areas of consoles - the ailerons. The pushing screw propeller horizontal thrust is enclosed in an annular outer fairing. Engine screw propeller installed inside obtect�La the rear fuselage. The complex landing gear system of airplane includes a means of creating a static air cushion under the wing centre section. The specified vessel peculiar to the complexity and high manufacturing cost, low compared to the ships hull strength associated with the presence of the wing, small capacity, high noise aircraft engines and propellers, large turning radius at cruising speed, low seaworthiness, a high degree of risk of navigation.

As the closest analogue adopted planing boat "sea raider". The air boat unloading was built in Japan (N. And. Belavin. The ekranoplans.- L.: Shipbuilding, 1977, p. 131). The hull is glycerous motor boat length 4.7 m, width 0.9 m. the aft deck is equipped with two air wing V-shape and scope 3.2 m. At the ends of the wings has a small surface floats that may enter the water only in the case of large roll and only alternately. In addition, the wing is provided with a controllable flap, the angle of attack which allows you to maintain a trim, depending on the load of the boat speed and sea state. The disadvantages of this boat is a bad cross stability afloat, limited seaworthiness, the difficulty in manufacturing, insufficient strength, a high degree of R�ska navigation.

The aim of the invention is to create a design of cranked, ensure the low cost and ease of manufacture, the necessary stability of a vessel at high speed and increased seaworthiness.

This object is achieved in that the housing cranked made wodoslawsky with a bottom V-shaped, with the bottom of the housing is additionally equipped with lugs, mounted from the sides to the middle away from the bow. On a diametral plane of the vessel includes ski cross sponsons that up to 30% reduce the contact of the ski with the surface of the water. In the bow mounted longitudinal planing steps, which is hollow and through.

The casing of cranked with the tides enables the creation of dynamic air cushion due to the pressure change in the tunnel formed between the keel of the tide and the Central ski, while the highest value of pressure is created in the aft. In addition, the presence of tides creates resistance to the formation of trim by the stern when planing. The manufacture of the longitudinal hollow sponsons and provides through akronohio air lubrication in planing mode.

The invention is illustrated by drawings, where Fig. 1 shows a side view, Fig. 2 shows a view from above and from below into �IG. 3 - view from the nose.

The proposed cranked includes the following elements: a housing 1 which is installed within the main motor 2, resulting in rotation of the propeller 3 which perform the functions of the steering wheel, tides 4, tunnels 5, 6 ski cross sponsons 9, the longitudinal planing steps 7, the crew quarters, cargo compartment or a compartment for weapons placed in the superstructure 8.

The device operates as follows:

In the beginning of acceleration, like all speed vessels, when it begins to operate the stop screw, the nose of cranked rises, causing a corresponding dip feed, more perepolnennyj parts, a sharp increase in displacement aft of cranked stops increasing trim. Trim cranked during the planing is not great. The forward part of the longitudinal through hollow sponsons is always above the water surface. When moving cranked, longitudinal planing steps formed a vacuum that draws in air and pumps it into the bottom. Body, coming in contact with air, the air gets a lubricant reduces the frictional resistance of the hull, which greatly increases the speed. Minimal trim and air lubrication allow akronohio, almost from the beginning of the movement to go on plane. When reaching a certain speed on glide � tunnels start to operate air dynamic forces, resultant of which is directed upwards and attached to the center plane. Resulting in complete alignment of the housing relative to a horizontal plane and the exit of the tides of the water, after which cranked moves only on the Central ski, which are hydrodynamic and hydrostatic forces directed upwards and push the ski out of the water. The stability of cranked when driving is ensured by the presence of dynamic air cushion in the tunnels and hydrodynamic forces on the body. With a slight inclinations are enhancing the display effect in the tunnels approaching the surface of the water and reducing the skin under the ascending tunnel. Thus, there is a righting moment. Further inclination of cranked tide touches the water and under the action of hydrodynamic and hydrostatic forces gives an extra impulse regenerating.

Cranked with its low total resistance is able to move at a speed of 80-110 km/h. The main components of resistance for conventional displacement vessels wave resistance, frictional resistance and resistance form is minimized. The air resistance when the streamlined hull and superstructure is small. Impedance dismissive little as cranked OS has�Rui the waterline. The frictional resistance of the underwater part of the hull is reduced by reducing the wetted surface due to the presence of air lubrication, dynamic airbag, lateral sponsons on the Central ski.

High speed cranked on the excitement provided by acute morphogenesis of the nasal ends of the housing and the streamlined design of the superstructure. When driving at high speed the ship pointed toe cuts through a wave, not having time, due to inertia, to respond to cyclical changes in the supporting forces, which provides passengers and crew comfort when driving with high speed on the waves. The proposed technical solution can be used to create high-speed vessels of various sizes and tonnage from small boats to the ship.

1. Cranked, comprising a housing made wodoslawsky with a bottom V-shape ski with a Central transverse sponsons, longitudinal planing steps, installed in the bow of the hull, characterized in that the bottom is additionally equipped with lugs, mounted from the sides toward the middle, and the longitudinal planing steps is hollow and through.

2. Cranked according to claim 1, characterized in that the tides are installed at a distance from the bow of the hull to its stern.



 

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FIELD: transport.

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EFFECT: enhanced performances.

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SUBSTANCE: invention relates to universal transport facilities that can move in various media. Amphibious planning vehicle comprises hull with cabin, engine compartment, screw propeller with protective ring and inflatable floats with blowers. Contact surface of the floats is equipped with protective shell arranged to flex over their length. Said hull is composed of a wing-type deck with small elongation that features sweepforward leading edge. Wing-type deck tail has flaps deflecting up and down and furnished with extending tail skids. With flaps moving down, said tail skids brake the vehicle on surface of motion. Wind-type deck inner space is filled with foam plastic and fuel tanks.

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FIELD: transport.

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SUBSTANCE: invention relates to ship building, particularly, to hovercrafts. Proposed joint comprises stiff structure composed of hovercraft hull stiff structural element edge strip and elastic shell attached thereto by fasteners to make hovercraft flexible guard. Said fasteners represent "П"-like clevises made of strong resilient material with their foot ends bent inside to make elastic spring-loaded hooks to lock the clevis. Said hovercraft hull stiff structural element edge strip is set to position approximating to normal line to the edge of as-stretched shell and has paired holes for clevis foot with hooks arranged along the joint length. Elastic shell panel edge is tucked under and clamped to make a pocket with perforated edge, perforation being aligned with holes in structural element edge strip through which clevises are run. Ends of clevises run through appropriate mate holes and ate fitted against the stop to lock engagement by latching ends of spring-loaded hooks.

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FIELD: transport.

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