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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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