A SEMINAR PRESENTATION ON ”STEALTH FIGHTER”

Presenter NamePresentation Date

Submitted to Mr. Deepak

GuptaMr. Ravindra

ChouhanAsst. Professor

(Mech. department)

Submitted byAbhishek

vishwakarmaRoll no.-

12EGjME703

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1. INTRODUCTION2. HISTORY3. HOW TO MAKE THINGS INVISIBLE4. PRINCIPLE OF STEALTH TECHNOLOGY5. HOW TO REDUCE RADAR DETECTION6. RADAR ABSORBING MATERIAL7. REDUCING INFRARED SIGNATURE8. REDUCING ACOUSTIC SIGNATURE9.PLASMA STEALTH10.LIST OF SOME STEALTH FIGHTER AIRCRAFT11.FUTURE SCOPE12.ADVANTAGE13.DISADVANTAGE14.CONCLUSION

CONTENTS -

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1. STEALTH IS A TECHNIQUE IN WHICH WE CAN MAKE ANY OBJECT ALMOST INVISIBLE. 2. STEALTH IS AN IMPORTANT TECHNOLOGY WHICH IS USED IN MILITARY OPERATIONS. 3. STEALTH TECHNOLOGY ALSO KNOWN AS LO TECHNOLOGY (LOW OBSERVABLE TECHNOLOGY). 4. THIS WAS DEVELOPED MAINLY TO EVADE THE RADAR DETECTION 5. THE FIRST STEALTH AIRCRAFT WAS DEVELOPED IN GERMANY DURING LAST YEARS OF WWII

INTRODUCTION

HISTORY -

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1. THE FIRST STEALTH APPLICATION WAS DEVELOPED IN GERMANY DURING WW-2 IN GERMAN SUBMARINES WHEN THEY USED RADAR ABSORBENT PAINT ON IT. 2. IN MID 1960’S, THE U.S. BUILT SR-71 BLACKBIRD, THAT WAS EXTREMELY RADAR-STEALTHY FOR ITS DAYS.

SR-71 BLACKBIRD

1.THE AIRPLANE CAN BE SHAPED SO THAT ANY RADAR SIGNALS IT REFLECTS ARE REFLECTED AWAY FROM THERADAR EQUIPMENT.2.THE AIRPLANE CAN BE COVERED IN MATERIALS THAT ABSORB RADAR SIGNALS( ALSO CALLED AS RADAR ABSORBING MATERIALS).

HOW TO MAKE THINGS INVISIBLE ?

PRINCIPLE OF STEALTH TECHNOLOGY

1. RADAR DETECTION.2. INFRARED DETECTION.3. ACOUSTIC DETECTION.

REDUCTION IN THESE DETECTION IS THE PRINCIPLE OF STEALTH TECHNOLOGY.

HOW TO REDUCE RADAR DETECTION ?

MOST CONVENTIONAL AIRCRAFT HAVE A ROUNDED SHAPE. THIS SHAPE MAKES THEM AERODYNAMIC, BUT IT ALSO CREATES A VERY EFFICIENT RADAR REFLECTOR. THE ROUND SHAPE MEANS THAT NO MATTER WHERE THE RADAR SIGNAL HITS THE PLANE, SOME OF THE SIGNAL GETS REFLECTED BACK.

A STEALTH AIRCRAFT, ON THE OTHER HAND, IS MADE UP OF COMPLETELY FLAT SURFACES AND VERY SHARP EDGES. WHEN A RADAR SIGNAL HITS A STEALTH PLANE, THE SIGNAL REFLECTS AWAY AT AN ANGLE, LIKE THIS:

THE MATERIAL THAT IS USED TO PAINT THE STEALTH CAN BE MADE OF SPECIAL MATERIALS LIKE CARBON POWDER IN THE GLUE OR SILICON BASED INORGANIC COMPOUND THAT WOULD ABSORB THE RADAR WAVES THAT FALL ON THE PLANE. RAM IS BASICALLY PAINT WITH WHICHEXTERNAL SURFACES ARE COATED WITH.

REDUCING INFRARED SIGNATURE.

1. HOT MATERIALS, SUCH AS ENGINE EXHAUST GASSES OR WING SURFACES HEATED BY FRICTION WITH THE AIR, EMIT MORE INFRARED RADIATIONS THAN COOLER MATERIAL. 2. EMBEDDING JET ENGINES INSIDE THE WINGS IS ONE BASIC DESIGN STEP TOWARDS INFRARED STEALTH. 3. OTHER MEASURES INCLUDE EXTRA SHIELDING OF HOTTER PARTS, MIXING OF COOLER AIR WITH HOT EXHAUSTS BEFORE EMISSION

REDUCING ACOUSTIC SIGNATURE.

1.THE ENGINES OF THE STEALTH PLANES SHOULD BE DESIGNED SUCH THAT THE NOISE EMITTED BY THEM IS MINIMUM.2.ENGINES SHOULD BE PLACED DEEP INSIDE THE PLANE.3.SLOW TURNING PROPELLERS WERE USED TO MINIMIZE THE NOISE IN EARLIER DESIGNS TO AVOID DETECTION BY ENEMY TROOPS. 4.INCORPORATING ACOUSTIC-STEALTH MEASURES, INCLUDING SOUND-ABSORBENT LININGS INSIDE ITS ENGINE INTAKE AND EXHAUST COWLINGS.

PLASMA STEALTH THIS AIRCRAFT INJECTS A STREAM OF IONIZED GAS WHICH ENVELOPES AIRCRAFT DUE TO WHICH MOST OF RADAR WAVES ARE ABSORBED.FOR SYSTEM TO WORK THERE HAS TO BE SOURCE OF ENERGY WHICH WILL IONIZE SURROUNDING AIR.

LIST OF SOME STEALTH FIGHTER AIRCRAFTS1. AMERICAN F-22 RAPTOR

2. F-117 NIGHTHAWAK

3. F-35 LIGHTNING II

4. SUKHOI T-50 STEALTH FIGHTER

FUTURE SCOPE 1.HYPERSONICS- THE IDEA IS TO TRAVEL WITH M>5 TO AVOID DETECTION.2. THE INFRARED INVISIBILITY CLOAK: SHIELD ONE’S BODY HEAT FROM INFRARED SENSORS, EFFECTIVELY MAKING THEM INVISIBLE TO INFRARED CAMERAS.3. PLASMA STEALTH TECHNOLOGY: ALSO KNOWS AS ACTIVE STEALTH TECHNOLOGY USES PLASMA TO REDUCE THE OVERALL RADAR CROSS SECTION OF AN AIRCRAFT.

ADVANTAGES • REDUCES THE CAUSALITY RATES DURING WAR

• SAVING MILITARY BUDGET.

• DEVELOP THE MILITARY SECRETES

• BLUFF THE ANTI-DETECTIVE DEVICE

• STEALTH AIRCRAFT ARE INVISIBLE TO RADAR

DISADVANTAGES:

• HIGH MANUFACTURING COST.• STEALTH AIRCRAFT CAN CARRY

REDUCED AMOUNT OF PAYLOAD.• COST OF MAINTENANCE IS HIGH. • DOES NOT PROVIDE THE OPTIMUM

AMOUNT OF LIFT. • 1 BILLION = 1 ARAB IN INR

CONCLUSION• UNDOUBTEDLY, STEALTH TECHNOLOGY IS THE FUTURE OF MILITARY COMBAT AND AT PRESENT IS ONE OF THE BEST TECHNOLOGY TO MAKE THINGS INVISIBLE AS FAR AS POSSIBLE.

• BUT , THE MAIN PROBLEM WITH STEALTH IS ITS VERY HIGH COST AND BECAUSE OF THIS, NOT ALL NATIONS CAN ADOPT THIS TECHNOLOGY.

• SO WE NEED TO FIND WAYS TO REDUCE COST OR ADOPT A DIFFERENT TECHNOLOGY WITH STEALTH LIKE CHARACTERISTICS AND AT LOW COST (NANO TECHNOLOGY).

THANK YOU

QUESTIONS

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