52998035 stealth technology

8/2/2019 52998035 Stealth Technology

1/30

welcome


2/30

STEALTH TECHNOLOGY

Presented By

SUPREETH.S(4MH07ME047)

Mysore, karnataka


3/30

CONTENTS

INTRODUCTION

HISTORY

CASE STUDY:F-117 NIGHTHAWK

RADAR ABSORBING MATERIALSADVANTAGESLIMITATIONS

CONCLUSION

FUTURE STEALTH TECHNOLOGY

REFERENCES / BIBLIOGRAPHY


4/30

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


5/30

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.


6/30

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


7/30

STEALTH VECHICLE SHAPES & DESIGN

It should be coated with the Radar Absorbing Materials.

Its tail should kept anACUTE angle.

Planes wings has to kept atAngle.

Design ofNose.

Stealth aircraft must bury the Engines within the wing or fuselage.


8/30

A corner reflector is a retroreflector

consisting of three mutually perpendicular,

intersecting flat surfaces, which reflects

electromagnetic waves back towards the

source.


9/30

When we are using normal shape

While we use Stealth Technology

Difference between conventional &

stealth aircraft design


10/30

CASE STUDY ON NIGHTHAWK PLANES


11/30

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


12/30

A: Two imaging infraredturrets are recessed into

the nose of the F-1 17.One looks forward to

acquire targets; the otheris on the underside and is

used for tracking andlaser designators .

B: The edges of the F-117's cockpit canopy, like

all surfaces on the aircraft, have no right-angles-

these are strong reflectorsof radar.

C: The unique arrowshape of the F-117 is

naturally unstable.Stability is maintained bycomputerized fly-by-wire

controls.

D: Bombs are strongradar reflectors, so the F-1 17 carries its weapons

internally. The bombdoors only open for a

moment when thewarload is released.

E: The Nighthawk's twinGeneral Electric engines

are buried deep in thefuselage. They have

shallow exhausts, whichcool and deflect the

exhaust gases upward tominimize heat emissions.

F: it is kept at an angle inorder to reduce the

detected by the radar.


13/30

ENGINES OF THE AIRCRAFT ARE COVERED

NORMAL FIGHTER PLANE SHOWING THE

ENGINE


14/30

STEALTH AIRCRAFT WITHOUT

EXHAUST

EXHAUST PLUME OF A NORMAL PLANE


15/30

Sensors


16/30

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.


17/30

COCKPIT


18/30

The cockpit has Head-up display.

equipped with large video monitors.

The cockpit has a full-colour moving map.

HEAD UP DISPLAY


19/30

FLIGHTMANAGEMENT


20/30

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.


21/30


22/30

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.


23/30

B-2 STEALTH BOMBER


24/30

In this stealth the

aircraft injects a

stream of ionized

gas which envelopes

the aircraft due towhich most of the

radar wave are

observe this make

the aircraft

completely invisible

PLASMA

STEALTH


25/30

ADVANTAGE

Stealth aircraft are invisable to radar.

Develop the military secretes.

Saving military budget.


26/30

Stealth technology has its own disadvantages like othertechnologies.

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


27/30

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.


28/30

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


29/30

ANY QUERIES


30/30

THANK YOU

52998035 stealth technology

Documents