• Save
Stealth Technology [Naeem Rezghi]
Upcoming SlideShare
Loading in...5
×
 

Stealth Technology [Naeem Rezghi]

on

  • 1,579 views

 

Statistics

Views

Total Views
1,579
Views on SlideShare
1,579
Embed Views
0

Actions

Likes
5
Downloads
0
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Stealth Technology [Naeem Rezghi] Stealth Technology [Naeem Rezghi] Presentation Transcript

  • 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
  • Outline• Introduction• History• Types of Detection• Radar Cross Section (RCS)• Reduction in RCS• Methods of Stealth• Pros and Cons• Conclusion
  • 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)
  • 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 invisible – An example of this technology in other military field: A camouflaged soldier
  • 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
  • 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
  • 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 signal – Signal direction is variable Figure 6 - RCS graph for B-26
  • Radar Cross Section (RCS) [Cont’d]
  • Radar Cross Section (RCS) [Cont’d]• The RCS value for different types of obstacles are categorized in the following tables:
  • Reduction in RCS
  • Reduction in RCS [Cont’d]
  • 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
  • Methods of Stealth [Cont’d]• Vehicle shape – It should be coated with the Radar Absorbing Materials. Figure 9 – Radar absorbing materials
  • 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
  • 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.
  • Figure 11 – B-2 bomber design details
  • 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
  • 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
  • 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
  • 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
  • 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
  • Methods of Stealth [Cont’d]• Coating and Absorbers – Visual stealth – Having a harmony with environment – Cannot be visually detected
  • 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
  • Methods of Stealth [Cont’d]
  • 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.
  • 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.
  • 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
  • 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
  • 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.
  • 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 Figure 23 – B-2 sprint and F-117A while falling bombs
  • 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
  • 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
  • Pros and Cons [Cont’d]
  • 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.
  • Any Question?
  • Questions to be answered: