BIHE University                              Department of Civil Engineering                             Airport Engineeri...
Outline• Introduction• History• Types of Detection• Radar Cross Section (RCS)• Reduction in RCS• Methods of Stealth• Pros ...
Introduction• What’s stealth technology?  – A technique of making objects invisible  – An important technology used in mil...
Introduction [Cont’d]• Most famous stealth aircrafts around the world
Introduction [Cont’d]• Task of Stealth Technology  – Partially invisible objects to radar  – Aircrafts cannot be fully inv...
History• World War II played in important role in stealth  technology development.• Germans were the 1st developers• Germa...
Types of Detection• Different radar signatures of vehicles can be  categorized as following:  – Radar Cross Section (RCS) ...
Radar Cross Section (RCS)                 Figure 5 – RCS of an aircraft
Radar Cross Section (RCS)                     [Cont’d] • A sample of RCS evaluating:   – B-26 aircraft   – 3 GHz frequency...
Radar Cross Section (RCS)          [Cont’d]
Radar Cross Section (RCS)                   [Cont’d]• The RCS value for different types of obstacles  are categorized in t...
Reduction in RCS
Reduction in RCS [Cont’d]
Methods of Stealth• Vehicle shape• Coating and Absorbers   – Composite materials   – Stealth Nano-carbon paint• Infrared s...
Methods of Stealth [Cont’d]• Vehicle shape  – It should be coated with the Radar Absorbing    Materials.                 F...
Methods of Stealth [Cont’d]• Vehicle shape  – It should be coated with the Radar Absorbing    Materials.  – It’s tail shou...
Methods of Stealth [Cont’d]• Vehicle shape  – It should be coated with the Radar Absorbing    Materials.  – It’s tail shou...
Figure 11 – B-2 bomber design details
Methods of Stealth [Cont’d]• Coating and Absorbers  – Generally four types of composite materials are    existed:     – PM...
Methods of Stealth [Cont’d]• Coating and Absorbers  – Generally four types of composite materials are    existed:     – PM...
Methods of Stealth [Cont’d]• Coating and Absorbers  – Generally four types of composite materials are    existed:     – PM...
Methods of Stealth [Cont’d]• Coating and Absorbers  – Generally four types of composite materials are    existed:     – PM...
Methods of Stealth [Cont’d]• Coating and Absorbers  – Stealth Nano-carbon paint     – “BLACKEST” know material of the worl...
Methods of Stealth [Cont’d]• Coating and Absorbers  – Visual stealth     – Having a harmony with environment     – Cannot ...
Methods of Stealth [Cont’d]• Coating and Absorbers    – Visual stealth        – New developments:             – Electro-ma...
Methods of Stealth [Cont’d]
Methods of Stealth [Cont’d]• Coating and Absorbers  – Plasma Stealth:     – Application in stealth technology:        – Pl...
Methods of Stealth [Cont’d]• Coating and Absorbers  – Plasma Stealth:     – Application in stealth technology:        – Pl...
Pros and Cons• Pros of stealth aircrafts:   – Few number of stealth aircrafts = Huge number of     conventional aircrafts ...
Pros and Cons [Cont’d]• Pros of stealth aircrafts:   – Few number of stealth aircrafts = Huge number of     conventional a...
Pros and Cons [Cont’d]• Pros of stealth aircrafts:   – Few number of stealth aircrafts = Huge number of     conventional a...
Pros and Cons [Cont’d]• Cons of stealth aircrafts:   – Low speed and maneuverability
Pros and Cons [Cont’d]• Cons of stealth aircrafts:   – Low speed and maneuverability   – Low amount of carried payload    ...
Pros and Cons [Cont’d]• Cons of stealth aircrafts:   – Low speed and maneuverability   – Low amount of carried payload   –...
Pros and Cons [Cont’d]• Cons of stealth aircrafts:   – Low speed and maneuverability   – Low amount of carried payload   –...
Pros and Cons [Cont’d]
Conclusion – Stealth technology is the future of military combat   technology. – In near future stealth technology can be ...
Any Question?
Questions to be answered:
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Stealth Technology [Naeem Rezghi]

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Transcript of "Stealth Technology [Naeem Rezghi]"

  1. 1. BIHE University Department of Civil Engineering Airport Engineering– CIV4117-S12 Aug-2012Overview Stealth Technology Course: Airport Engineering Course ID: CIV4117-S12 Instructor: Mr. Houtan Pourkhorsand Date: Friday, August 24, 2012 Presenter: Naeem Rezghi Spring 2012
  2. 2. Outline• Introduction• History• Types of Detection• Radar Cross Section (RCS)• Reduction in RCS• Methods of Stealth• Pros and Cons• Conclusion
  3. 3. Introduction• What’s stealth technology? – A technique of making objects invisible – An important technology used in military operations. – Also known as LOT (Low Observable Technology)
  4. 4. Introduction [Cont’d]• Most famous stealth aircrafts around the world
  5. 5. Introduction [Cont’d]• Task of Stealth Technology – Partially invisible objects to radar – Aircrafts cannot be fully invisible – An example of this technology in other military field: A camouflaged soldier
  6. 6. History• World War II played in important role in stealth technology development.• Germans were the 1st developers• Germans developed the stealth Nano-paint during the WWII! (In recent years the MIT scientists became successful of making such a similar thing) Figure 4 – Hitler’s first stealth aircraft Figure 4 – Hitler’s first stealth aircraft
  7. 7. Types of Detection• Different radar signatures of vehicles can be categorized as following: – Radar Cross Section (RCS) – Infrared signature – Acoustic signature – Visible signature – Laser Cross Section – Magnetic signature
  8. 8. Radar Cross Section (RCS) Figure 5 – RCS of an aircraft
  9. 9. Radar Cross Section (RCS) [Cont’d] • A sample of RCS evaluating: – B-26 aircraft – 3 GHz frequency signal – Signal direction is variable Figure 6 - RCS graph for B-26
  10. 10. Radar Cross Section (RCS) [Cont’d]
  11. 11. Radar Cross Section (RCS) [Cont’d]• The RCS value for different types of obstacles are categorized in the following tables:
  12. 12. Reduction in RCS
  13. 13. Reduction in RCS [Cont’d]
  14. 14. Methods of Stealth• Vehicle shape• Coating and Absorbers – Composite materials – Stealth Nano-carbon paint• Infrared stealth – Black Hole Ocarina (BHO) system – Film Cooled Tailpipe (FCT) system• Visual stealth• Plasma stealth
  15. 15. Methods of Stealth [Cont’d]• Vehicle shape – It should be coated with the Radar Absorbing Materials. Figure 9 – Radar absorbing materials
  16. 16. Methods of Stealth [Cont’d]• Vehicle shape – It should be coated with the Radar Absorbing Materials. – It’s tail should kept an ACUTE angle. – Planes wings has to kept at Angle. – Design of Nose. Figure 10 – F117-A geometric design
  17. 17. Methods of Stealth [Cont’d]• Vehicle shape – It should be coated with the Radar Absorbing Materials. – It’s tail should kept an ACUTE angle. – Planes wings has to kept at Angle. – Design of Nose. – Stealth aircraft must embed the Engines within the wing or fuselage.
  18. 18. Figure 11 – B-2 bomber design details
  19. 19. Methods of Stealth [Cont’d]• Coating and Absorbers – Generally four types of composite materials are existed: – PMCs [Polymer Matrix Composite materials] Figure 12 – PMC materials
  20. 20. Methods of Stealth [Cont’d]• Coating and Absorbers – Generally four types of composite materials are existed: – PMCs [Polymer Matrix Composite materials] – MMCs [Metal Matrix Composite materials] Figure 13 – MMC materials
  21. 21. Methods of Stealth [Cont’d]• Coating and Absorbers – Generally four types of composite materials are existed: – PMCs [Polymer Matrix Composite materials] – MMCs [Metal Matrix Composite materials] – CMCs [Ceramic Metal Composite materials] Figure 14 – CMC materials
  22. 22. Methods of Stealth [Cont’d]• Coating and Absorbers – Generally four types of composite materials are existed: – PMCs [Polymer Matrix Composite materials] – MMCs [Metal Matrix Composite materials] – CMCs [Ceramic Metal Composite materials] – Carbon Composites Figure 15 – Carbon Composite
  23. 23. Methods of Stealth [Cont’d]• Coating and Absorbers – Stealth Nano-carbon paint – “BLACKEST” know material of the world – Absorb 99% of the received signal – Excellent electrical conductivity and high Strength Figure 16 – Stealth Nano-carbon paint
  24. 24. Methods of Stealth [Cont’d]• Coating and Absorbers – Visual stealth – Having a harmony with environment – Cannot be visually detected
  25. 25. Methods of Stealth [Cont’d]• Coating and Absorbers – Visual stealth – New developments: – Electro-magnetically conductive polyaniline-based radar absorbent material. – It is connected into an internal computer of aircraft. – The system will analyze the whole environment and compute the best pattern for each side of aircraft.Figure 18 – Scheme of invisible aircraft
  26. 26. Methods of Stealth [Cont’d]
  27. 27. Methods of Stealth [Cont’d]• Coating and Absorbers – Plasma Stealth: – Application in stealth technology: – Plasma will cover the whole body of aircraft – Plasma cloud will absorb the radar waves and prevent aircraft’s detection.
  28. 28. Methods of Stealth [Cont’d]• Coating and Absorbers – Plasma Stealth: – Application in stealth technology: – Plasma will cover the whole body of aircraft – Plasma cloud will absorb the radar waves and prevent aircraft’s detection.
  29. 29. Pros and Cons• Pros of stealth aircrafts: – Few number of stealth aircrafts = Huge number of conventional aircrafts [Economical in long term] Figure 21 – Stealth aircraft VS. conventional ones
  30. 30. Pros and Cons [Cont’d]• Pros of stealth aircrafts: – Few number of stealth aircrafts = Huge number of conventional aircrafts [Economical in long term] – Keeping enemy in fear of stealth aircrafts’ existence. So they will remain in defense mood. Figure 22 – Scheme of confused soldiers by stealth aircrafts
  31. 31. Pros and Cons [Cont’d]• Pros of stealth aircrafts: – Few number of stealth aircrafts = Huge number of conventional aircrafts [Economical in long term] – Keeping enemy in fear of stealth aircrafts’ existence. So they will remain in defense mood. – The natural competition of war will result in economically weakening of the enemy. – Diplomatic result: Stealth aircrafts have high military technology and military secrets.
  32. 32. Pros and Cons [Cont’d]• Cons of stealth aircrafts: – Low speed and maneuverability
  33. 33. Pros and Cons [Cont’d]• Cons of stealth aircrafts: – Low speed and maneuverability – Low amount of carried payload Figure 23 – B-2 sprint and F-117A while falling bombs
  34. 34. Pros and Cons [Cont’d]• Cons of stealth aircrafts: – Low speed and maneuverability – Low amount of carried payload – High RCS while using of weapons Figure 23 – B-2 sprint and F-117A while falling bombs
  35. 35. Pros and Cons [Cont’d]• Cons of stealth aircrafts: – Low speed and maneuverability – Low amount of carried payload – High cost: – B-2 bomber: $2 billion – F-117A: $70 million – F-22: $100 million(x kg) (x kg) Figure 24 – Scheme of cost analysis of stealth aircrafts
  36. 36. Pros and Cons [Cont’d]
  37. 37. Conclusion – Stealth technology is the future of military combat technology. – In near future stealth technology can be used in other facilities like ships, helicopters, vehicles, etc. – The main problem of this technology is its high cost. – The pros of stealth technology is in most of cases weighted to its cons. – Stealth technology, due to its high cost, cannot be a proper choice for developing countries such as Iran. – New developments in other fields of technology such as Nanotechnology can be used instead of stealth technology due to their low cost.
  38. 38. Any Question?
  39. 39. Questions to be answered:

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