News Home, where you will find the "Current Top Stories"The Communication Center contains current news briefs from major Universities, NASA, ESA, and the top three Aviation Mfg.Science section contains all the latest knowledge in Medical Research, Archeology, Biology, and other General Science NewsCurrent Earth Science and Environmental discoveries.The E.A.R., Environmental Awareness Report. E.A.R. will keep you advised of Environmental Alerts, Government, University, and public projects. All the current space discoveries from Hubble, Spitzer, Chandra X-Ray, ESO, Gemini, Subaru, ESA, NASA, and many more. The latest in space theories from leading astronomers and scientist from around the world.The Space Weather Forecast Center by Scientific Frontline, Current up-to-date space weather, forecasts, alerts and warnings. Images from SOHO, GOES, and STEREO. Plus solar observations from Erika RixCurrent space missions newsThe Cassini Main Page. Containing all the latest news from the Cassini Spacecraft around Saturn. Leading into Cassini status reports, The Cassini Gallery of all the latest images from Cassini. Seeing Saturn and all her moons like never before.Daily Sky maps, Celestial Events Calendar.Observatories Gallery, Images from the Great Observatories on Earth and Above. The Stellar Nights  Gallery, An amateur astronomical collection from John Crilly, Richard Handy, Erika Rix, and Paul RixCloudy Nights Telescope Reviews / An Atronomical Community.The latest in Computer, Nanotechnology, and General Technological advancements.The latest in Aviation achievements in civil, military, and space aviationGlobal News Videos, a different kind of news covarage that often overlooked.The news archive from Scientific Frontline's past articles. A world of knowledge at your fingertips.Abstracts, Journals, and Technical papers maintained by Scientific Frontline. The Gateway to all the galleries in the Scientific Frontline collectionSea Shepherd Org. Help save the whales!Research Department | Staff and Researchers OnlySite Related links from major universities, government and private research labs.Assorted Downloads related to space, science, aviation, including screensavers and ASTROMONY SOFTWARE, and other endorsed programs.Scientific Frontline Forum | HypercubeThe foundation of an online publication by SFL ORG. News Network called Scientific FrontlineContact page to Scientific Frontline / SFL ORG. News NetworkDisclaimer / Legal Notice for use of the SFL ORG. News Network's publication Scientific Frontline
 
Previous Photo Next Photo
Research and Development
Unmanned Aerial Vehicle
Helicopters
Historical Aircrafts
Civil / Private Aircrafts
Commercial Aircrafts
Military Aircrafts

Global Hawk RQ-4

Global Hawk RQ-4
Title : Global Hawk RQ-4
Description : The Northrop Grumman Global Hawk has its origins in the 1994 High-Altitude Endurance Unmanned Aerial Vehicle Advanced Concept Technology Demonstrator (HAE UAV ACTD) program initiated by the Defense Advanced Research Projects Agency (DARPA) and Defense Airborne Reconnaissance Office (DARO). This effort was undertaken as a reaction to the perceived excesses of the highly classified and enormously expensive Lockheed/Boeing Advanced Airborne Reconnaissance System (AARS) program initiated in the mid-1980s. A loitering long-range strategic reconnaissance UAV designed to penetrate contested airspace and carry a wide range of sensors, AARS was cancelled in May 1993 due to cost overruns and the loss of its main mission with the end of the Cold War.



Two distinct air vehicles and respective ground segments made up the HAE UAV ACTD program. Global Hawk was built to the Tier II+ requirement, which called for a conventionally configured UAV, while the Lockheed Martin/Boeing DarkStar fulfilled the Tier III- requirement for an unconventional low-observable UAV. DarkStar, primarily a technology demonstrator, quickly ran into trouble when it crashed during its second takeoff. DarkStar did not take to the air again until 26 months later, when test flights revealed unanticipated stability problems. These performance concerns, along with escalating costs, led to Air Force cancellation of the program after just six flights.



In the Phase I design competition for the Tier II+ platform, five contractors were invited to participate. This was reduced to one contractor, Teledyne Ryan Aeronautical (now part of Northrop Grumman), after budget cuts prior to the Phase II downselect. Very early in Phase III, Global Hawk demonstrated notable military utility and subsequently entered the formal acquisition process. The UAV's Common Ground Segment (CGS) was also a success, controlling the air vehicle as well as the transmission and dissemination of imagery.



Few aircraft have shown such utility and deployment capability so early in flight testing. Global Hawk's autonomous high-altitude, long-duration flight characteristics were proven, along with the capability of its Synthetic Aperture Radar (SAR) sensor to provide high-quality imagery. Though not part of the original requirement, Global Hawk and its sensors were also shown to be dynamically retaskable during its trials with the Air Force's 31st Test and Evaluation Squadron. The Global Hawk effort succeeded where DarkStar failed because it focused on the design and construction of a practical air vehicle that was developmentally mature enough to be transitioned into an operational weapons system.

Global Hawk RQ-4 Block 10




Wingspan: 116.2 ft (35.4 m)

Length: 44.4 ft (13.5 m)

Height: 15.2 ft (4.6 m)

Gross Take-off Weight: 26,700 lbs (12,110.9 kg)

Payload: 2,000 lbs (907.2 kg)

Ferry Range: 12,000 nm (22,236 km)

Maximum Altitude: More than 65,000 ft (19.8 km)

Loiter Velocity: 343 knots TAS

On-Station Endurance at 1,200 nm: 24 Hours

Maximum Endurance: 35 Hours (31.5 Hours Demonstrated)




Global Hawk RQ-4 Block 20/30/40



Wingspan: 130.9 ft (39.9 m)

Length: 47.6 ft (14.5 m)

Height: 15.3 ft (4.7 m)

Gross Take-off Weight: 32,250 lbs (14,628 kg)

Payload: 3,000 lbs (1,360 kg)

Ferry Range: 12,300 nm (22,780 km)

Maximum Altitude: More than 60,000 ft (18.3 km)

Loiter Velocity: 310 knots TAS

On-Station Endurance at 1,200 nm: 24 Hours

Maximum Endurance: 36 Hours

Sensors

Synthetic Aperture Radar: 1.0/0.3 M Resolution (WAS/Spot)

Electro-Optical: NIIRS 6.0/6.5 (WAS/Spot)

Infrared: NIIRS 5.0/5.5 (WAS/Spot)
Credit : Northrop Grumman
Source : Northrop Grumman


Powered by Gallery v1 RSS


© SFL ORG. Educational News Network


Copyright Notice
The Images and Video's in the gallery pages may be protected by copyright. You may download one copy for non-commercial personal use to be displayed on your personal computer. Use other then non-commercial requires that you obtain permission if copyrighted from the copyright holder. See disclaimer page for more detail. We will help direct you to the proper source if you are unsure of copyright holder or your usage. Please always state proper source / credit.



Scientific Frontline®, Stellar Nights®, E.A.R.®, and Environmental Awareness Report®”
Are Registered Trademarks of the
Online Publication of the SFL ORG. Educational News Network
Oklahoma City, Oklahoma USA
A Not-for-Profit Educational News Service
© 2005 - 2013 All Rights Reserved


Home | Comm. Center | Space Weather Center | Galleries | About Us | FAQ | Site Map | Contact Us | Privacy Policy | Terms of Service