RU2572366C2 - Shipborne and ground-based lower radar signature aircraft with all around antenna system - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering, partially, to development of shipborne and ground-based aircraft with observation and guidance all around antennas intended for traffic control and sea patrolling. Claimed aircraft comprises fuselage, wing, empennage, power plant, undercarriage and all around antenna system. Wing central part features radioparent leading and trailing edges and has larger contraction than the wing end parts. Note here that the wing central part features contraction for antennas arranged at wing leading and trailing edges to allow all around observation.

EFFECT: enlarged coverage of air situation, lower radar signature, unimpeded crew ejection, easy access to antenna system cowls.

2 cl, 3 dwg

Description

Aircraft of low radar visibility deck and ground based with a system of antennas of all-round visibility.

The present invention relates to aircraft and relates to the creation of aircraft with a system of antennas of circular visibility both deck and ground based for the tasks of radar monitoring and guidance (RLDN), air traffic control and sea patrolling.

The well-known family of carrier-based aircraft RLDN E-2 "Hawkai" with a circular antenna [1], which are used for ground-based, and the Soviet project carrier-based aircraft Yak-44E [2]. These aircraft contain a fuselage, a wing with consoles folding on the deck parking, horizontal tail, separated vertical tail, a power plant of two turboprop engines, a rotating radome of the radio-technical complex (RTK) antenna with a pylon, landing gear and landing hook. Also known is a patent for the invention RU 2499740 C2 “Aircraft of radar monitoring and guidance of deck and ground based” [3], on which, unlike the E-2 Hawkai and Yak-44E aircraft, the RTK antennas are installed in developed side fairings located in the lower parts of the fuselage.

The closest technical solution, selected as a prototype, is the patent for the invention RU 2499740 C2 "Aircraft of radar patrol and guidance of deck and ground based" [3], containing the fuselage, the wing with the consoles folding back on the deck parking, horizontal tail, spaced vertical tail , a power plant of two turboprop engines, developed side fairings located in the lower part of the fuselage, landing gear and landing hook.

The disadvantage of such an airplane scheme is a slight reduction in the wing and screws of the upward viewing sectors. Screw engines and developed side fairings will not allow to develop an acceptable speed. The use of this aircraft circuit (with a separate all-round radome fairing and a wing spaced apart in height relative to each other) contributes to the re-reflection of the irradiating signal back and does not reduce radar visibility using conventional means of lowering it, such as tilting to the vertical plane of the side surfaces, S -shaped channels of air intakes, V-shaped tail, etc. An airplane with such a mutual position of the parts, as well as in the presence of propellers, cannot be lozametnym that, eventually, would not allow him to fight in a group of stealth aircraft and even more on their own.

The technical result of the proposed solution is to provide a circular view by expanding the coverage area of the air environment, limited only by the technical capabilities of the antennas, reducing radar visibility, increasing flight speed, reducing take-off and landing distance and increasing the steepness of the trajectory during approach, the possibility of combat operations as part of groups of stealth aircraft, and if you have weapons yourself.

At the same time, it remains possible to eject the crew in emergency situations or when the aircraft is hit by enemy means.

The technical result is achieved by the fact that the aircraft is made according to the "low-wing" scheme with a V-tail and with a wing, the central part of which has a greater narrowing than the end parts of the wing. Moreover, the central part of the wing is selected with such a restriction that the antennas installed in its front and rear edges provide a circular view. The front and rear edges of the central part of the wing are made transparent and they are placed antennas of all-around visibility. The aircraft has jet engines. To reduce the take-off distance when using an aircraft from short runways or from aircraft carriers with a springboard start, engines (engine) can be equipped with afterburners. The fuselage is made with nose and tail fairings, in which additional RTK antennas are placed to improve the all-round visibility. Since the trailing edges of the central part of the wing are made transparent and occupied by antennas, simple flaps are installed on the lower surface of the central part of the wing to increase the maximum wing lift and increase the steepness of the trajectory when approaching, in contrast to the usual simple flaps installed on trailing edge, offset forward and located in front of the rear radiotransparent fairings.

Offset forward simple shields also allows you to reduce the diving moment when they are released.

Thus, the inventive aircraft low radar visibility deck and ground based with a system of antennas of circular visibility meets the criteria of the invention of "novelty." Comparison of the claimed solution not only with the prototype, but also with other technical solutions protected by patents in the given technical field did not allow revealing in them the features that distinguish the claimed solution from the prototype, which allows us to conclude that the criterion is “inventive step”. The inventive solution is suitable for industrial implementation.

The invention is illustrated by the following description and drawing, where:

in FIG. 1 shows a top view of an aircraft of reduced radar visibility deck and ground based with a system of antennas of all-round visibility;

in FIG. 2 shows a front view of an aircraft of reduced radar visibility of deck and ground based with a system of antennas of all-round visibility;

in FIG. 3 shows a side view of an aircraft of reduced radar visibility of deck and ground based with a system of antennas of all-round visibility.

The aircraft has low radar visibility deck and ground based with a system of antennas for circular viewing (Fig. 1, 2, 3) is made according to the scheme "low-wing" with wing 1, the central part 2 of which has a greater narrowing than the end parts of the wing. The front 3 and rear edges 4 of the central part of the wing 2 are made transparent and they have antennas for circular viewing 5. The air intakes of engines 7 are located on the sides of the fuselage 6 above the central part of the wing 7. Simple shields 8 are installed on the lower surface of the central part of the wing 2 in front of the rear radiotransparent fairings 4 . In the rear of the fuselage 6 is a V-shaped tail unit 9. The nozzles of the engines (engine) 10 are located between the surfaces of the V-shaped unit 9.

The main landing gear 11 are installed on the central part of the wing and are retracted into the fuselage 6. In the nose fairing 12 of the fuselage 6 and in the fairing 13 of the developed rear part of the fuselage 6 are additional antennas RTK 14 and 15.

The RTK 5 all-round antennas installed in the front 3 and rear 4 edges of the wing center 2 of the RTK 5 antenna together with the additional RTK 14 antenna in the nose of the fuselage 6 and the additional RTK 15 antenna in the rear of the fuselage 6 form a common RTK overview diagram. On the upper surface of the fuselage 6, hatches 16 are made for ejection of the entire crew.

The installation of RTK 5 all-round antennas in the front 3 and rear 4 edges of the central part of the wing 2 and additional RTK 14, 15 antennas in the bow 1 and rear of the fuselage 6, as well as the use of jet engines 10 and the V-shaped tail unit 9, made it possible to obtain an unobstructed circular diagram review, limited only by the technical capabilities of the antennas used on the aircraft, as well as significantly reduce the radar visibility of the aircraft.

Such an airplane scheme allows it to be used for an unmanned version.

Technical and economic efficiency is expressed in expanding the coverage area of the air environment, increasing flight speed and reducing radar visibility.

Thus, the set of essential features of a carrier-based and ground-based aircraft provides unobstructed all-round visibility, an increase in flight speed, a reduction in take-off and landing distance, an increase in the steepness of the trajectory during approach, a significant reduction in radar visibility, the possibility of unhindered ejection of the entire crew and easy access to the fairings of antennas RTK. The present invention can be implemented according to existing technologies from materials used in aircraft construction, and the existing level of development of antenna-feeder devices and equipment production.

Information sources

1. FLIGHT. No. 5-11, February 2008, pp. 28-29.

2.Http: //www.airwar.ru/enc/spy/yak44.html

3. Patent RU 2499740 C2.

Claims (2)

1. Aircraft of low radar visibility deck and ground based with a system of all-round antennas, comprising a fuselage, wing, tail, powerplant, landing gear and a system of all-round antennas, characterized in that the central part of the wing is made with radiotransparent front and rear edges and has a larger narrowing than the end parts of the wing, and the central part of the wing is made so narrow that installed in its front and rear edges of the antenna provide a circular view. 2. Aircraft of reduced radar visibility deck and ground based with a system of antennas of circular review according to claim 1, characterized in that on the lower surface of the Central part of the wing in front of the rear radiolucent edges installed simple shields.

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