1. AGNINAYAN S PATIL 1AP07EC004 ECE
Stealth Technology
AGNINAYAN S PATIL
1AP07EC004
ECE

2. AGENDA Introduction Evolution Characteristics Design process Drawbacks
Counter stealth
Applications
Examples
Conclusion

3. WHAT IS STEALTH TECHNOLOGY ?
Stealth is a technique of making an object invisible.
Stealth is an important technology used in military operations.
Stealth is also known as LO(low observable) technology

4. EVOLUTION
From earliest days deception has been used to gain advantage over the enemy.
Early combat aircraft in WW- I used camouflage to make visual detection difficult.
Advent RADAR in late 1930’s and during WW-II enabled early detection of aircraft .
In 1940’s a unique way with low RADAR cross section strategic bombers developed.
In late 50’s and 60’s came LO planes with compromised performance .

6. STEALTH CHARACTERISTICS
Airframe shaped for low radar cross section.
Use of radar absorbent materials(RAM).
Minimized infrared signature.
Reduced engine noise.
Reduced visual signature.

7. “How to make things invisible”
DESIGN PROCESS

8. RADAR CROSS SECTION
RCS of a target is a measure of its size as seen by the radar.
It’s a complex function of the geometric cross section of the target.
RCS is a characteristics of the target not the radar.

9. RCS of a metal plate
Large RCS but decreases rapidly as the incident angle deviates from the normal

10. RCS of metal sphere
Small RCS but independent of the incident angle.

11. Aircraft high RCS area

12. Designed low observability areas

13. Comparative RCS

14. Radar Absorbing Material(RAM)
Nanostructural composite materials absorbing radar waves without reflecting.
RAM reduces the radar cross section making the object appear smaller.

15. The other techniques are
Active cancellation
Passive cancellation
Plasma stealth

16. DRAWBACKS Poor aerodynamic properties.
Requires high end electronic instruments and software's.
High maintenance cost.
Limited amount of ordnance.

17. Counter Stealth Technology
Obtain stronger RADAR returns employing sophisticated algorithm.
VHF and UHF radars
High frequency over the horizon radars(OTHRs).
BI-static and multi-static radar technology.

18. APPLICATIONS Used in wind farms. Civil aviation and launch vehicles
Military applications.

19. LOCKHEED MARTIN F-22A Wing Span 44.5 ft Length 62 ft 1 in
Wing area sq. ft.
Top Speed Mach 2+
Range Nm
Altitude ,000 ft
Air Superiority
Low Observable

20. B-2 SPIRIT

21. Adaptive water curtain technology

22. “The future is bright, the future is stealth….”
CONCLUSION
“The future is bright, the future is stealth….”

23. Thank You….