Stealth technology uses techniques to make aircraft, ships, and other objects invisible to radar. It has been developed since World War II to provide military advantages. Key aspects of stealth technology include shaping vehicles to reduce radar reflections, using radar absorbing materials, and burying engines and weapons internally to minimize radar signatures. The F-117 Nighthawk stealth fighter demonstrated the effectiveness of these techniques through its distinctive delta wing design and use of radar absorbing coating. Future stealth aircraft could use plasma stealth to envelop vehicles in ionized gas and make them invisible to radar.

1. welcome

2. STEALTH TECHNOLOGY Presented By SUPREETH.S (4MH07ME047) Mysore, karnataka

3. CONTENTS INTRODUCTION HISTORY CASE STUDY : F-117 NIGHTHAWK RADAR ABSORBING MATERIALS ADVANTAGES LIMITATIONS CONCLUSION FUTURE STEALTH TECHNOLOGY REFERENCES / BIBLIOGRAPHY

4. What is Stealth Technology ? Stealth is a technique in which we can make any object invisible. Stealth is an important technology which used in military operations. Stealth technology also known as LO technology (low observable technology) INTRODUCTION

5. HISTORY The first "stealth" aircraft have been developed in Germany during the last years of WWII. This technique has also been used in ships. Later americans worked on stealth technology And suceeded.

6. RADAR CROSS-SECTION REDUCTIONS Almost since the invention of radar, various techniques have been tried to minimize detection. Some of the techniques used for this purpose are: 1. vehicle shape 2. radar absorbing material

7. STEALTH VECHICLE SHAPES & DESIGN It should be coated with the Radar Absorbing Materials . It’s tail should kept an ACUTE angle. Planes wings has to kept at Angle . Design of Nose. Stealth aircraft must bury the Engines within the wing or fuselage.

8. A corner reflector is a retroreflector consisting of three mutually perpendicular, intersecting flat surfaces, which reflects electromagnetic waves back towards the source.

9. When we are using normal shape While we use Stealth Technology Difference between conventional & stealth aircraft design

10. CASE STUDY ON NIGHTHAWK PLANES

11. Nighthawk design Crew One Length 19.4m (63ft 9in) Height 3.9m (12ft 9in) Weight 23,625kg (52,500lb) Angle of Sweep of Delta Wing 67°

12. A: Two imaging infrared turrets are recessed into the nose of the F-1 17. One looks forward to acquire targets; the other is on the underside and is used for tracking and laser designators . B: The edges of the F-1 17's cockpit canopy, like all surfaces on the aircraft , have no right-angles-these are strong reflectors of radar. C: The unique arrow shape of the F-117 is naturally unstable. Stability is maintained by computerized fly-by-wire controls. D: Bombs are strong radar reflectors, so the F-1 17 carries its weapons internally. The bomb doors only open for a moment when the warload is released. E: The Nighthawk's twin General Electric engines are buried deep in the fuselage. They have shallow exhausts, which cool and deflect the exhaust gases upward to minimize heat emissions. F: it is kept at an angle in order to reduce the detected by the radar.

13. ENGINES OF THE AIRCRAFT ARE COVERED NORMAL FIGHTER PLANE SHOWING THE ENGINE

14. STEALTH AIRCRAFT WITHOUT EXHAUST EXHAUST PLUME OF A NORMAL PLANE

15. Sensors

16. For navigation and weapon aiming, the aircraft is equipped with a forward-looking infrared (FLIR) and a downward-looking infrared (DLIR) sensors It consist of four probes at the nose.

17. COCKPIT

18. The cockpit has Head-up display. equipped with large video monitors. The cockpit has a full-colour moving map. HEAD UP DISPLAY

19. FLIGHT MANAGEMENT

20. Before flight, mission data is downloaded on to the IBM AP-102 mission control computer, which integrates it with the navigation and flight controls to provide a fully automated flight management system.

22. What is Radar Absorbing Materials (Stealth)? Nanostructural composite material, absorbing without reflection radar wave. Magnetic ferrite-based substance RAM reduces the radar cross section making the object appear smaller.

23. B-2 STEALTH BOMBER

24. In this stealth the aircraft injects a stream of ionized gas which envelopes the aircraft due to which most of the radar wave are observe this make the aircraft completely invisible PLASMA STEALTH

25. ADVANTAGE Stealth aircraft are invisable to radar . Develop the military secretes . Saving military budget .

26. Stealth technology has its own disadvantages like other technologies. Stealth aircraft cannot fly as fast or is not maneuverable like conventional aircraft. Another serious disadvantage with the stealth aircraft is the reduced amount of payload it can carry. On the other hand a conventional aircraft can carry much more payload than any stealth aircraft of its class. Cost of maintenance DISADVANTAGE

27. CONCLUSION  Stealth technology is a techniques used with Aircrafts, ships order to make them less visible to radar.  Need of Stealth Technology very importance in military field.

28. REFERENCE: Future Flight: The Next Generation of Aircraft Technology, William D. Siuru , Jhon D. Busick, Published 1933 McGrew-Hill Professional, 194 pages, ISBN 0830643761 Have Blue and the F-117A: Evolution of “Stealth Fighter” , By David C. Aronstein, Albert C Piccirillo, Published 1997 American Institute of Aeronautics and Astronautics, 305 pages, ISBN 1563472457 Stealth technology: The Art of Back Magic , By J. Jones, Matt Thunder http://www.geocities.com/Area51/Shadowlands/6583/projects.html http://en.wikipedia.org/w/index.php?title=Stealth_aitcraft http://en.wikipedia.org/wiki/F-117_Nighthawk

29. ANY QUERIES

30. THANK YOU