DE1781082B - Air cushion landing gear for aircraft excreted from 1456011 - Google Patents

Description

End portion of the air chamber 32 carries the remaining pressure of the support load of the air cushion and therefore is under greater pressure in all directions. However, the air chamber is designed so that it only is elastic in the circumferential direction of the cross section of the chamber, whereby the edge portion of the Air chamber 32 compresses a little in the vertical direction under starting conditions without becoming but take off at its rear end (Fig. 4). The described changes to the shape of the air chamber take place at the same time as a further adaptation of the floor profile section of the air chamber to the oneself attitude changing attitude with respect to the landing area. This means that the cross-sectional peripheral portion remains at the bottom of the air chamber at a small distance from the counter surface, whereby the Required vertical support force for the aircraft while avoiding damaging, rubbing contact is generated with the mating surface.

The two air chambers 30 and 32 are one behind the other arranged. One of these air chambers 32 is at least twice as large as the other. The bigger one Air chamber 32 lies in the longitudinal direction of the aircraft below the center of gravity of the aircraft, while

rend the smaller chamber 30 is attached in front of it. This creates the arrangement of a three-wheeled vehicle Mimicked wheel landing gear, and the aircraft possesses, from the pilot's point of view, for landing and landing Start process similar operating characteristics as

with such a wheeled chassis.

1 sheet of drawings

Claims (1)

1 2 of the aircraft is arranged and at least twice Patent claims: _{SQ big jst like the other Lu} f _t kummer, which one before 1. Air cushion landing gear for aircraft is arranged on the larger air chamber.
Elastic air chamber attached to the aircraft fuselage, the invention is explained in more detail with the aid of the figures, for example with a balloon-like ring shape and with a 5. It shows
Air supply device in the same and along F i g. 1 is a view of an aircraft with two air chambers according to the invention from the bottom circumference of the air chambers from air outlet openings arranged obliquely below, thereby front and back, indicates that two symmetrical to the F i g. 2 three side views of the in F i g. 1 shown Longitudinal axis in the longitudinal direction of the aircraft fuselage put the aircraft in three positions when landing fes (20) one behind the other retractable and unrolling, Air chambers (30, 32) are provided, from FIG. 3 three of the f i g. 2 corresponding side ends which an air chamber (32) is arranged under the view of the aircraft in three positions at the center of gravity of the aircraft and run to take off and when climbing and
is at least twice as large as the other 15 F i g. 4 shows an enlarged, schematic vertical air chamber (30) which, in front of the larger air chamber, is a partial section of the undercarriage part of the in FIGS. 1 chamber (32j is arranged. To 3 aircraft shown at the moment of 2. Air cushion chassis, characterized by the start of the climb, as shown in Fig. 3 is shown. net that the air chambers (30, 32) only in order. The device according to the invention can at direction of the cross section of the chambers (30, ao all types of aircraft can be used. They 32) are elastic. can be built into an aircraft that generally a Raumpf 20, wings 22-22, a tail unit 24 and a propeller or jet drive 25 or has another drive device. »5 The embodiment shown in the figures has two air chambers 30 and 32, with which The invention relates to an air cushion running gear for air cushions 50 produced by supply lines 34. Airplanes with elastic attached to the fuselage. The air chambers are normally open during the see air chambers with balloon-like ring-shape flight deflated and drawn in in such a way that they become and with an air supply device in the same and in the aerodynamic profile of the aircraft fuselage as along the circumference of the floor, insert air chambers. The air chambers 30 and 32 are off arranged air outlet openings. any suitable flexible film material From British patent specification 935 825 a is made and have a balloon-like ring shape. Air cushion undercarriage with balloon-shaped air chambers The air chambers 30, 32 are known at 40 along them, which to a certain extent are flexible 35 on the ground acting surfaces with slots, but when the air supply is switched off, they are provided so that jets of compressed air from the inside have the same shape as can be ejected downwards during generation,
of the air cushion. The air chambers are therefore also in FIGS. 2, 3 and 4 show how the air chambers 30, 32, which are always blown out of the fuselage of the vehicle while driving, add to the landing and take-off, which is particularly important when the aircraft takes off at high speed. As shown in the left part, there is a strong aerodynamic drag. from F i g. 2 shown, the aircraft at Further from British patent specification 894 644 landing in a normal horizontal position is flying, and from U.S. Patent 239,544 an aerial until it gets so close to the landing pad that known cushion landing gear, in which two landing air - the forces created by the Bodeneinfluss the cushions in the longitudinal direction of the aircraft fuselage behind 45 take over vertical support of the aircraft. the are arranged to each other. In the known arrangement, the thrust direction of the propeller or the nozzles can The two air cushions are roughly the same size and can now be reversed, or there can be friction and braking or the like. Lowered the division into two separate air cushions so that the flight could without impairing the effect, it is used to stand still or to lift the floor so that a single position required for movement is brought together, as in hanging air cushion. It is also the right part of FIG. 2 shown. In the middle part in the known designs do not concern FIG. 2 shows how the aircraft is steered elastic air chambers with a balloon-like ring- can be made so that the rear end of the chamber form of the aforementioned Art. 32 grinds for braking on the runway, if On the other hand, there is the task of the present 55 this is desirable. the invention therein, two one behind the other arranged in F i g. 3 is the aircraft taking off Neten air chambers of the type described at the beginning are shown for take-off and take-off. Tm right to train so that about the behavior of a three-part of the F i g. 3 the aircraft begins to take off wheeled wheeled chassis is mimicked. Run through it. In the middle part of FIG. 3 is the bow the controls for the pilot when starting and 60 are already raised. As shown in Figure 4, Land similar to such a wheel drive, the large, rear air chamber 32 in this case plant. state of motion due to the influence of the soil the maximum According to the invention, this object is achieved in the case of a supporting force for the aircraft at the rear edge of the The aforementioned air-cushion suspension is thereby released, air chamber. The front end of the air can 32 that two symmetrical to the longitudinal axis in the longitudinal direction 65 is lifted from the counteracting surface and leaves tion of the aircraft fuselage arranged one behind the other, its air content can flow out freely. The front end Nete retractable air chambers are provided, the air chamber is relatively relaxed and The one air chamber below the center of gravity takes on a normal shape, while the rear one