stealth technology
TRANSCRIPT
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Stealth Technology
AGNINAYAN S PATIL
1AP07EC004
ECE
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AGENDAIntroductionEvolutionCharacteristicsDesign processDrawbacksCounter stealthApplicationsExamplesConclusion
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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
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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 .
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STEALTH CHARACTERISTICS
Airframe shaped for low radar cross section.
Use of radar absorbent materials(RAM).
Minimized infrared signature.
Reduced engine noise.Reduced visual
signature.
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DESIGN PROCESS“How to make things invisible”
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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.
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RCS of a metal plate
2
224
ba
Large RCS but decreases rapidly as the incident angle deviates from the normal
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RCS of metal sphere
2r
Small RCS but independent of the incident angle.
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Aircraft high RCS area
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Designed low observability areas
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Comparative RCS
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Radar Absorbing Material(RAM)
Nanostructural composite materials absorbing radar waves without reflecting.
RAM reduces the radar cross section making the object appear smaller.
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The other techniques areActive cancellation Passive cancellationPlasma stealth
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DRAWBACKS
Poor aerodynamic properties.Requires high end electronic instruments and
software's.High maintenance cost.Limited amount of ordnance.
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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.
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APPLICATIONS
Used in wind farms.Civil aviation and launch
vehiclesMilitary applications.
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LOCKHEED MARTIN F-22A• Wing Span 44.5 ft
• Length 62 ft 1 in
• Wing area 830 sq. ft.
• Top Speed Mach 2+
• Range 800 Nm
• Altitude 65,000 ft
• Air Superiority
• Low Observable
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B-2 SPIRIT
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Adaptive water curtain technology
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CONCLUSION
“The future is bright, the future is stealth….”
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Thank You….
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