Rao Rakesh Rajiv gave a technical seminar on stealth technology. He discussed how stealth technology uses design and radar absorbing materials to prevent detection by radar. Specific techniques discussed included shaping aircraft to deflect radar signals, coating surfaces with materials like iron ball paint that absorb radar energy as heat, and using plasma cloaking to envelop aircraft in ionized gas that absorbs radar waves. Both military and civilian applications of stealth technology were reviewed, along with its limitations and potential future applications and research areas.

1. TECHNICAL SEMINAR
STEALTH TECHNOLOGY
BY
RAO RAKESH RAJIV
DAYANANDA SAGAR COLLEGE OF
ENGINEERING
DEPARTMENT OF CHEMICAL ENGINEERING

2. Index
1. What is Stealth Technology
2. RADAR-Radio detection and ranging
3. Principles and methods of stealth
4. Design
5. Radar absorbing Material
6. Plasma Stealth
7. Other applications
8. Limitations
9. Conclusion
10. References

3. WHAT IS STEALTH TECHNOLOGY
❖ STEALTH means “AVOIDING DETECTION”
❖ Stealth technology is used to prevent Detection of aircrafts and planes
from RADAR.
❖ Stealth technology likely began in Germany during world war two
Later America worked on stealth technology and succeeded
❖ They are also used in military ships, helicopters and drones.

4. RADAR-RAdio Detection And Ranging
❖ Radar is an object-detection system that
uses radio waves and microwaves to
determine the range, angle, or velocity of
objects. It can be used to detect aircraft,
ships, spacecraft, guided missiles, motor
vehicals and terrain.
❖ Radar system is a system that help pilots
in navigating while flying and is used in
every Airport in the world.

5. RADAR tower at London Heathrow
Airport

6. Principles and methods of Stealth
• Stealth Technology works on the following principle :
• Reflection
• absorption
• scattering.
• Stealth technology depends on :
• Design of aircraft
• Coating with RADAR absorbing materials
• Using Plasma

7. DESIGN
Normal Passenger aircraft Stealth
Aircraft

8. Lockheed F-117A
Nighthawk

10. RADAR ABSORBING MATERIAL
❖ Iron Ball Paint- Microscopic spheres with
an iron based coating. RADAR signals hit
the paint, paint ends up in a change in
magnetic field. Molecules in the paint
moves back and forth , converting radar
signals into Heat which then gets
transferred through out the body of the
plane and then dissapates
❖ One technique used in the F-117A
Nighthawk and other such stealth aircraft is
to use electrically isolated carbonyl iron
balls of specific dimensions. Each of these
microscopic spheres is coated in quartz
(silicon dioxide) as an insulator

11. PLASMA
❖ Fourth fundermental state of matter
❖ It is an ionized gas consisting of positive ions and free electrons ,
resulting in more or less no overall electric charge
❖ very good absorber of Electromagnetic waves, depending upon
their densities.

12. Plasma Stealth
❖ Currently being developed by
Russia.
❖ In this Plasma stealth the aircraft
injects a stream of ionized gas
which envelopes the aircraft due
to which most of the radar wave
are absorbed, this make the
aircraft invisible.

13. Northrop Grumman B-2
Spirit

15. Sikorsky UH-60 Black Hawk
Basic
Model
Modified Stealth Version

16. Sea Shadow (IX-529)

17. Lockheed Martin RQ-170
Sentinel

18. LIMITATIONS
• Cannot be flown at high speeds
• Cannot maneuver
• Reduces amount of payload
• Very expensive
• High maintainence cost

19. Conclusion
• Stealth technology is the future of air combat.
• 100% reduction in RCS isn't still achievable and the research contines until
achieved.
• As the research for stealth technology continues, the reseach on Anti-Stealth also
continues parallelly
• In the future, stealth technology will not only be incorporated in fighters and
bombers but also in tanks, Military road vehicles, transport planes.
• Most of the research work done on stealth technology is top secret but, the
knowledege gained from the survey could be helpfull in development of various
other useful non military applications.

20. References
• http://en.wikipedia.org/wiki/Stealth_technology
• http://en.wikipedia.org/wiki/Radar
• http://science.howstuffworks.com/question69.htm
• https://en.wikipedia.org/wiki/Northrop_Grumman_B-2_Spirit
• https://en.wikipedia.org/wiki/Lockheed_F-117_Nighthawk
• http://www.ijesi.org/papers/Vol%202(10)/B02101018022.pdf
• http://www.defenceaviation.com/2008/03/plasma-stealth.html