RU193488U1 - BODY OF THE AIRCRAFT RESCUE BOAT - Google Patents

Abstract

The utility model relates to inflatable rescue boats, in particular to the inflatable hull of an aircraft rescue boat. The hull consists of a bow compartment, two aft cowls, aft can, an inflatable front can (seat) and an inflatable bottom. The bow compartment is separated from the aft fairings by sealed cylindrical membranes fixed inside the sides of the boat hull in the vertical plane of the axis of the front cans. The cylindrical part of the membrane has a length greater than the distance from the axis of the front cans to the extreme rear points of the jacks for fastening the cables and oarlocks used in the oars. Thereby, a stable position of the oarlocks and thimbles of the cable stay is achieved in case of damage to one of the compartments of the boat hull. If any of the compartments of the boat’s side, including the stern can, is broken, the boat remains stable and controllable. 2 s.p. f-ly.

Description

The invention relates to an inflatable rescue craft, in particular to the inflatable hull of an aircraft rescue boat.

The utility model “Inflatable boat” is known (patent RU 81469, published March 20, 2009), which contains a U-shaped main balloon, bow, stern with transom and bottom attached to the main balloon, bow and stern. To improve driving performance, the boat is supplemented with a block of three independent cylindrical cylinders glued together along the entire length of the cylinders using flexible fabric hinges and connected in the stern by a common overlay. The block of lower cylinders and the main cylinder of the body are connected by gluing to the bottom and mechanically fixing the lining of the block to the transom of the body. Additionally, between the side surface of the lower cylinders of the block and the lower surface of the main cylinder can be glued tension false bottom. The lower cylinders can be made with truncated nasal extremities. The bottom consists of several cylinders glued together. The disadvantages of this design are the complexity of manufacture, the presence of voids between the cylinders, which will necessarily get water and it is difficult to dry them. In the event of a breakdown of any of the side or bottom cylinders, the hull of the boat loses its rigidity, which immediately impairs its driving performance and stability. Two balloons, three bottoms and two bulwarks are heavy.

The utility model “Motor inflatable boat” is known (patent RU 152276, published May 20, 2015), containing inflatable sides, made in plan in the form of an open contour of an A-shape with conical ends in the stern, a transom attached to the sides in their lower part is elastic the bottom, consisting of upper and lower parts, and a means of creating a keel-like shape of the bottom, characterized in that the upper and lower parts of the bottom are attached to the inflatable sides along the upper and lower perimeters, and the inflatable sides along the entire contour of the docking with the bottom contain a single cutout, with internal longitudinal partitions placed inside the cutout points, docked to the inner surface of the flanges in the cutout region with the formation of a closed bead balloon volume on one side of the partition, and the inner surface of the edge edges, which are joined with the inside fixed to it, on the other external cavity adjacent outer surfaces of the upper and lower parts of the bottom. The disadvantage of this design is the complexity of manufacturing, slots in the sides are fraught with the threat of simultaneous depressurization of both sides and the bottom. A hard transom is not applicable to an aircraft rescue boat due to its heavy weight. It also increases the dimensions of the boat laid in the cover.

Inflatable boats having a horseshoe-shaped hull, consisting of 2-3 compartments, and a rigid transom in the stern (for example, patent RU No. 187677, published March 14, 2019) or a stern can, but not having a transverse front can (seat), which connects the two sides, when one of the compartments is broken, it immediately loses its shape, since the ring-shaped contour breaks, and the inflatable bottom bends. This significantly affects its driving performance and stability.

A well-known aviation rescue boat LAS-5M-3 (TU 005291-83), mass-produced. The hull of the boat consists of two stern fairings, a stern can, a horseshoe-shaped bow compartment. The front can (seat) is glued between the sides of the bow compartment. In a gas-filled state, they form an A-shape. The bow compartment is separated from the aft fairings by spherical membranes located aft of the seat. The feed jar is glued between the end fairings. All four compartments are filled with carbon dioxide from a cylinder or air with manual fur and are interconnected by banding tubes, which can be pinched in case of breakdown of one of the compartments. The seat and bottom are pumped separately by manual fur. The bottom along the perimeter in one line is attached to the sides and the stern jar and practically does not affect the stiffness of the boat, since the air-filled bottom compartment does not rest against the sides of the boat. Thus, if the bow compartment receives the hole, the seat loses pneumatic connection with the aft cowls and rests only on the inflatable bottom. Closed circuits that create body rigidity are destroyed. Sitting creates buoyancy separate from the feed fairings and the feed can. Under the weight of people, the boat is folding.

The objective of this utility model is to ensure the rigidity of the hull of the boat, ensuring its stability and controllability in case of breakdown of one of the inflatable compartments.

The technical effect is achieved by the fact that the membranes separating the bow from the aft cowls are cylindrical and are mounted inside the boat’s circumference in a vertical plane along the axis of the inflatable seat, and the inflatable bottom has a bow equal to that of the bow of the boat and fits snugly the compartments of the side of the boat.

When filling the bottom with gas, it creates predetermined contours of the bottom of the boat and bursts the sides of the boat, providing the necessary rigidity and stability of the structure during the breakdown of the cylinders of the boat.

In FIG. 1 shows the hull of the boat in plan: a) with a hole in the bow; b) with a hole in the left aft fairing. Compartments inflated to operating pressure are shown in bold lines. The bottom is not shown.

In FIG. 2 shows a longitudinal section of a boat sailing with a pierced bow compartment.

In FIG. 3 shows a photo of the boat: a) with a broken bow compartment; b) with a broken left aft fairing.

The hull of the boat (Fig. 1) consists of the bow compartment 1, the right aft fairing 2, the left aft fairing 3, the aft can 4, the inflatable front can (seat) 5 and the inflatable bottom 9. The bow compartment is separated from the aft fairings by sealed cylindrical membranes 6 fixed inside the sides of the boat hull in a vertical plane along the axis of the front can 5. The cylindrical part of the membrane is longer than the portion of the side of the boat on which there are thimbles 7 for fastening the cables 14 and oarlocks 8, used for paddling, m-axis direction in front banks stern. Thereby, a stable position of the oarlocks 8 and thimble 7 of the cable-stayed cable 14 is achieved when one of the compartments of the boat hull is damaged. For sailing (Fig. 2), the mast 10 is inserted into the shaft of the mast 11, passing through the seat 5 and the bottom 9 into the front edge of the keel 12 (the solution is known by design LAS-5M-3). The mast cables 14 are attached to the thimbles 7, the shaft 15 - to the double thimble 13. The sail in FIG. 2 not shown.

When all the compartments of the side of the boat are pumped up to operating pressure, then the membranes 6 are in an arbitrary unstressed position. During breakdown of the nose compartment 1, the membranes under gas pressure in the aft cowls 2 and 3 are pressed into the nose compartment (Fig. 1a). In this case, a rigid contour is formed of compartments filled to a working pressure with a hand pump, consisting of aft cowling, elongated by cylindrical membranes, aft and front banks, supported by the bottom. The nose of the boat is maintained in the working position, the bottom is filled up to the working pressure, and, additionally, during sailing, by the rod 15 (Fig. 3a). This ensures the stability and controllability of the boat in case of damage to the bow compartment. The shape of the nasal compartment in the absence of excess pressure is maintained sufficiently so as not to scoop up water.

In case of damage to the left aft cowl (Fig. 1b), the gas pressure of the right aft cowl, the right membrane is squeezed into the bow compartment, and the left into the left aft cowl. (If the right aft fairing is damaged, the membranes are pressed in the same way in the opposite direction). In this case, a rigid contour is formed of compartments filled up to operating pressure with a hand pump, consisting of a bow compartment, an intact feed fairing, one of the cylindrical membranes, aft and front can supported by a bottom. This ensures the stability and controllability of the boat in case of damage to one of the feed fairings (Fig. 3b). The shape of the damaged feed fairing, in the absence of excess pressure, is preserved sufficiently so as not to scoop up water, since the inner side of the surface of the damaged feed fairing is stretched between the feed can and the bow compartment with a membrane pressed into the feed fairing.

The breakdown of the stern can practically does not affect the stability and controllability of the boat, since its shape is maintained thanks to the stern fairings and the inflatable bottom.

The only limitation: do not place people in a damaged compartment. When the bow compartment is broken down (Fig. 3a), the crew can be located behind the front can, as well as on it. When the left aft fairing is broken (Fig. 3b), the crew is located on the front and karma banks, as well as on intact compartments of the side.

Confirmation of the technical result of the presented design of the hull of an aircraft rescue boat was obtained during field tests.

Claims (3)

1. The hull of an aircraft rescue boat, consisting of a bow compartment, two aft cowls, aft banks, a front can (seat) and an inflatable bottom, characterized in that the bow compartment is separated from the aft cowls by sealed cylindrical membranes fixed inside the sides of the boat hull in a vertical plane along the axis of the front banks. 2. The hull according to claim 1, characterized in that the cylindrical part of the membrane has a length greater than the portion of the side of the boat, on which there are thimbles for fastening the cable-stayers and oarlocks used in the oar stroke, from the axis of the front can in the direction of the stern. 3. The hull according to claim 1, characterized in that the inflatable bottom fits snugly on the compartments of the side and in the bow has a bend up equal to the bend of the bow of the boat.

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