welcome

STEALTH TECHNOLOGY

Presented By  SUPREETH.S(4MH07ME047)

Mysore, karnataka

CONTENTSINTRODUCTION

HISTORY

CASE STUDY:F-117 NIGHTHAWK

RADAR ABSORBING MATERIALS

ADVANTAGES

LIMITATIONS

CONCLUSION

FUTURE STEALTH TECHNOLOGY

REFERENCES / BIBLIOGRAPHY

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

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 technologyAnd suceeded.

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

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.

A corner reflector is a retroreflector

consisting of three mutually perpendicular,

intersecting flat surfaces, which reflects

electromagnetic waves back towards the

source.

When we are using normal shape

While we use Stealth Technology

Difference between conventional & stealth aircraft design

CASE STUDY ON NIGHTHAWK PLANES

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°

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.

ENGINES OF THE AIRCRAFT ARE COVERED

NORMAL FIGHTER PLANE SHOWING THE ENGINE

STEALTH AIRCRAFT WITHOUT EXHAUST

EXHAUST PLUME OF A NORMAL PLANE

Sensors

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.

COCKPIT

The cockpit has Head-up display.

equipped with large video monitors.

The cockpit has a full-colour moving map.

HEAD UP DISPLAY

FLIGHT MANAGEMENT

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.

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.

B-2 STEALTH BOMBER

In this stealth theaircraft injects astream of ionizedgas which envelopesthe aircraft due towhich most of the

radar wave areobserve this makethe aircraftcompletely invisible

PLASMA STEALTH

ADVANTAGE

Stealth aircraft are invisable to radar.

Develop the military secretes.

Saving military budget.

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

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.

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

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