RQ-4 Global Hawk
RQ-4 Global Hawk - strategic reconnaissance drones manufactured in the USA.
February 28 1998 city made its first flight from the air force base in California. In 2004, the first aircraft was handed over to the US Navy. In March 2006, he proceeded to carry out combat missions.
During 30 hours patrolling unit can produce at an altitude of 18 thousand. Meters. Created Teledyne Ryan Aeronautica - an American company (subsidiary of Northrop Grumman).
US Air Force in January 2012 was decided to freeze the purchase of RQ-4 Global Hawk in this modification as the Block 30. Earlier adopting planes scheduled to transfer to the reserve. The main reason - a costly service vehicles, much higher than the cost of using Lockheed U-2.
Then in 2013, the US Department of Defense has decided to allocate 1,2 billion for the purchase of aircraft 6 RQ-4 in the modification of Block 40 of the military budget in 525 billion.
Design RQ-4 Global Hawk
RQ-4 made by the normal aerodynamic scheme. The wing consists of a composite material which is based on carbon fiber. Tail V-tail consists of composite materials. The fuselage is a monocoque composed of aluminum alloys. Length - 13,3 meters, wingspan - 35 m and take-off weight - about 15 tons.
The aircraft has TVDD Allison Rolls-Royce AE3007H with 31,4 kN thrust and can carry a payload of up to 900 kilos.
Set of aircraft consists of ground and air segments, service segments and trained personnel. With regard to air a segment, it includes BLPLA with different sensors, data transmission systems and avionics. The ground segment consists of services and equipment start-up, ground control systems with terrestrial communications equipment. All ground equipment to improve mobility is on special trailers or in containers.
RQ-4 Global Hawk is equipped with an integrated system of intelligence and surveillance HISAR. It is a cheaper, simpler version ASARS-2, created by Hughes for the spy plane Lockheed U-2. This complex is used on board the UAV RC-7B and is aimed at the international market. The complex also includes infrared and optical sensors, radar SAR / MTI. These subsystems can be used simultaneously, and data processed by a single processor. They can be transferred in real time to the ground through a satellite channel or within a line of sight (50 Mbit / s).
Engaged in the development of radar company Raytheon (Hughes). It is able to operate smoothly in all weather conditions. It allows you to get a radar image in normal mode with a resolution of 1 m. According to the statistics for the day you get the picture from the territory of 138 thousand sq. M. m at 200 km. In point mode shooting area 2h2 kilometers per day, you can get more 1900 images having resolution of m 0,3 Global Hawk. Subsystem SAR / MTI operates at X-band and is able to provide:
- detection and scanning moving targets within 100 km;
- mode resolution detailing 1,8 10 square meters per square meters. km;
- surveillance in combined mode with a resolution of 6 meters in length from the strip to 20 110 km wide 37 km.
The radar can detect ground moving objects and to provide data about them (speed and position) in text messages.
Electron-optical camera made by Hughes. With it you can get high quality images. The sensor is associated with a telephoto lens having a telephoto lens with a distance 1750 mm. Used 2 modes: scanning 10 km of the image area 2h2 km.
Image with EO / IR sensors and processed by the radar on board the UAV in the form of individual frames is transmitted to a ground station. In turn, the ground station consists of image frames and prepares them for future use.
Inertial amended used for navigation. Global Hawk is used for free flight and transfer of intelligence through satellite channels to the ground station (VHF band and Ku). If the aircraft will be used in the line of sight, it is possible to transfer data directly to a suitable ground station.
RQ-4 Global Hawk Video
The ground segment is made up of maintenance equipment, launch and ground control systems, also manufactured by Raytheon. MCE designed for setting goals, monitoring and control, transmission and image processing. LRE is used to run RQ-4 Global Hawk, as well as search. As part of the LRE have equipment to calculate the corrections system GPS, which allows to define the exact position of the UAV during take-off and landing. The rest of the main means of navigation - inertial system. During missions LRE and MCE may be in different places (usually MCE is in the location of the command). These systems are housed in fortified shelters have external antenna for satellite and direct communication.
Modifications RQ-4 Global Hawk
AV - NASA in 2007 year it acquired two UAV for atmospheric research GloPac. In 2009 year renovations were completed. The modified aircraft could climb 20 km in height with a heavy scientific equipment on board (907 kg).
RQ-4A Global HawkIt represents a basic modification.
- Block 10: All seven built UAV, which was written off 2011.
- RQ-4B Global Hawk. This includes three versions:
- Block 20,
- Block 30,
- Block 40.
RQ-4E Euro Hawk a German modification RQ-4, developed concern aerospace corporation EADS and Northrop Grumman. In October 2009 year was presented to the market.
MQ-4C Triton a maritime patrol aircraft, built on the basis of RQ-4 Global Hawk. It has X-band radar designed to detect different surface ships, and is one of the extended maritime surveillance of the US Navy.
Polar Hawk - A modification that will go to the Canadian Armed Forces. It is based on Block 30. Airplane adapted for use even in very cold conditions. Can rise to a height of 18,3 thousand. M and within 33 hours to conduct uninterrupted observation.
Application RQ-4 Global Hawk
RQ-4 Global Hawk - the first UAV, which managed to get permission to US Federal Aviation Administration to send flight mission and their own mission with civilian air corridors without notice.
The cost of Global Hawk and potential operators
The price of the aircraft is estimated to 140 million (does not include R & D costs). An hour of flight costs $ 31 thousand.
Canada is a potential buyer who wants to use aircraft to monitor remote areas of the Arctic. And the Global Hawk will supplement or replace the patrol CP-140 Aurora.
Japan was interested in three Global Hawk.
Spain has plans for the purchase of aircraft and with the company Northrop Grumman has already signed contracts.
New Zealand is also building its plans for RQ-4 Global Hawk, seeing it as a potential observation of the Pacific Islands and the Southern Ocean. Also, for these purposes can use the modern drone Kahu and IAI Heron.
RQ-4 Global Hawk features:
Crew: 0 on board (3 Remote Control: LRE pilot; MCE pilot and sensor operator)
Length: 47,6 m (14,5 m)
Wingspan: 130,9 feet (39,9 m)
Height: 15,3 m (4,7 m)
Net weight: 14950 kg (6781 kg)
Gross weight: 32250 kg (14628 kg)
Powerplant: 1 × Rolls-Royce F137-RR-100 turbofan, 7600 lbf (34 kN) of thrust
Cruising speed: 357 miles / h (310 kN; 575 km / h)
Range: 8700 miles (7560 NMI; 14001 km)
Endurance: 28 hours Ceiling: 60000 m (18288 m)
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