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Transcript of Stealth technology
STEALTH TECHNOLOGY: Into The Depths
By: Heather A Brooks
What Is Stealth Technology? Scientifically known
as low observatory Used in Military
aviation Reduces detection
range of an aircraft Similar to
camouflage tactics used by soldiers
Partial indivisibility to radar and other detection
http://www.airforce-technology.com/projects/f117/images/nhawk11.jpg
(“Stealth Technology”, 2008), (Kumar)
How Does Stealth Work?
Uses the principle of reflection and absorption as well as redirection.
Interferes with communication 2 structure surface designs of stealth
aircrafts
› RAS, RAM
(Kumar)
RAS: Radar Absorbent Surfaces Deflects Incoming Radar Reduces detection range Structures include wings, refueling boom Works due to angles of structures and how they are placed.
Should have no 90 degree angles Uses reflection
F-117 “Night Hawk”http://www.aerospaceweb.org/aircraft/bomber/f117/f117_03.jpg
(Kumar)
RAM: Radar Absorbent Material Absorbs radar signals Depends on material of the surfaces Believed to be silicon based organic compound Gives the aircraft appearance to be the size of a bird
B-2 Stealth Bomberhttp://www.aerospaceweb.org/aircraft/bomber/b2/b2_04.jpg
(Sweetman)
IR: Infrared
Another Important Factor that influences stealth Signature given out by aircraft Reduces visibility in thermal imaging systems Depends on where engine in placed Built to have very low IR Top secret technology
(Kumar)
Infrared Aircrafts
Left: B-2 Right: F-22 Center: JSF
http://www.aerospaceweb.org/aircraft/bomber/b2/b2_04.jpg http://www.commutefaster.com/F-22.jpg
http://www.defenseindustrydaily.com/images/AIR_F-35_JSF_On_Tarmac_lg.jpg(Kumar)
Plasma Stealth “Active Stealth” Inject Stream of Plasma Covers entire body of aircraft Absorbs most electromagnetic energy of radar First developed by Russians
Soviet Russian Space Program
http://servv89pn0aj.sn.sourcedns.com/~gbpprorg/mil/radar/B2_Conden_1.jpg
(Kumar)
Methods of Avoiding Detection
Carry Weapons Internally Turning Radar off Use wingman
› IFDL: In Flight Data Link
(Day, 2001)
Detection Methods
Triangulate location with a network of radar systems
Method of microwaves similar to cell phone towers
(Kumar)
Disadvantages of Stealth Technology
Cannot fly fast Cannot Maneuver Reduces amount of payload Cost
Equivalent to its own weight in gold
(Kumar)
COST
$2 Billion
$100 Million
$70 Million
(Kumar)
Limitations Sensors to locate targets size Attack on ground targets Airborne laser radar in poor weather Vulnerability to visual detection: 10 miles Special maintenance
(Sweetman)
http://www.groovythemes.com/aviation/stealth_fighter-med.jpg
History of Stealth Technology
Invented by First caveman and leaves Soldiers and trees Submarines and waves, coatings Aircrafts and radar
Cont.(Day, 2001)
History of Stealth Technology
Applying Stealth Technology to airplanes in 1940’s
Began designs in 1950’s 1970’s Mathematician developed Echo 1 1980’s-1990’s Computer availability of
stealth techniques
Cont.(Day, 2001)
History of Stealth Technology First Stealth Aircraft
F-117› Lockheed Martin
ATF Contest› Fought for multi-
billion contract JSF Competition Second World War
used tin and aluminum
Russia, India, China competitors F-117 Stealth
Fighters
http://www.wingweb.co.uk/wingweb/img/600-F-117A_Stealth_fighter_37th_Tonopah.jpg
(Kumar)
F-117 Stealth Aircraft
5 were tested between 1981-1982
Squadron declared operational in 1983
Unveiled from top secrecy in 1989
Became famous in 1991 Persian Gulf War
1999 shot down by Russian missile
Most famous stealth aircraft
59 built by Lockheed for Air Force
http://www.aviationspectator.com/files/images/F-117A-Nighthawk-stealth-fighter-70.jpg
(Day, 2001), (“Stealth Technology”, 2008)
USA F-117
ReferencesDay, D.A. (2001). Stealth aircraft. U.S. Centennial of Flight Commission, Retrieved from http://centennialofflight.gov/essay/Evolution_of_Technology/Stealth_aircraft/Tech3.htm
Day, D.A. (2001). Stealth Technology. U.S. Centennial of Flight Commission, Retrieved from
http://centennialofflight.gov/essay/Evolution_of_Technology/Stealth_aircraft/Tech18.htm
Kumar, A.G. (n.d.). What is Stealth technology?. Total Air Dominance, Retrieved from http://totalairdominance.50megs.com/articles/stealth.htm
Stealth Technology. (2008). The Columbia encyclopedia. Retrieved (2010, April 05) from http://encyclopedia.com/doc/1E1-stealtht.html
Sweetman, B. (n.d.). VI- Stealth Aircraft: Eagles Among Sparrows?. Fas.org. Retrieved (2010, April 06) from
http://www.fas.org/spp/aircraft/part06.htm