Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Stealth fighter technolgy

882 views

Published on

Stealth fighter technolgy use in fighters aircraft

Published in: Engineering
  • Be the first to comment

Stealth fighter technolgy

  1. 1. A SEMINAR PRESENTATION ON ”STEALTH FIGHTER” Presenter Name Presentation Date Submitted to Mr. Deepak Gupta Mr. Ravindra Chouhan Asst. Professor (Mech. department) Submitted by Abhishek vishwakarma Roll no.- 12EGjME703
  2. 2. 1. INTRODUCTION 2. HISTORY 3. HOW TO MAKE THINGS INVISIBLE 4. PRINCIPLE OF STEALTH TECHNOLOGY 5. HOW TO REDUCE RADAR DETECTION 6. RADAR ABSORBING MATERIAL 7. REDUCING INFRARED SIGNATURE 8. REDUCING ACOUSTIC SIGNATURE 9.PLASMA STEALTH 10.LIST OF SOME STEALTH FIGHTER AIRCRAFT 11.FUTURE SCOPE 12.ADVANTAGE 13.DISADVANTAGE 14.CONCLUSION CONTENTS -
  3. 3. 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
  4. 4. HISTORY - 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
  5. 5. 1.THE AIRPLANE CAN BE SHAPED SO THAT ANY RADAR SIGNALS IT REFLECTS ARE REFLECTED AWAY FROM THE RADAR EQUIPMENT. 2.THE AIRPLANE CAN BE COVERED IN MATERIALS THAT ABSORB RADAR SIGNALS( ALSO CALLED AS RADAR ABSORBING MATERIALS). HOW TO MAKE THINGS INVISIBLE ?
  6. 6. PRINCIPLE OF STEALTH TECHNOLOGY 1. RADAR DETECTION. 2. INFRARED DETECTION. 3. ACOUSTIC DETECTION. REDUCTION IN THESE DETECTION IS THE PRINCIPLE OF STEALTH TECHNOLOGY.
  7. 7. 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.
  8. 8. 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:
  9. 9. 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 WHICH EXTERNAL SURFACES ARE COATED WITH.
  10. 10. 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
  11. 11. 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.
  12. 12. 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.
  13. 13. LIST OF SOME STEALTH FIGHTER AIRCRAFTS 1. AMERICAN F-22 RAPTOR
  14. 14. 2. F-117 NIGHTHAWAK
  15. 15. 3. F-35 LIGHTNING II
  16. 16. 4. SUKHOI T-50 STEALTH FIGHTER
  17. 17. 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.
  18. 18. 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
  19. 19. 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
  20. 20. 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).
  21. 21. THANK YOU
  22. 22. QUESTIONS

×