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Stealth Aircraft Technology

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by Austin Tan on 18 April 2013

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Transcript of Stealth Aircraft Technology

Brief History The first stealth application was developed in Germany during WW-2 in German submarines when they used Radar absorbent paint on it.


Later Americans worked on it and succeeded.


In mid 1960’s, the U.S. built a high altitude reconnaissance aircraft, the Lockheed SR-71 Blackbird, that was extremely RADAR-stealthy for its days. Purpose B-2s have successfully released bomb shapes from the rotary launcher and conventional weapons from bomb-rack assemblies.

It is capable of all-altitude attack missions up to 50,000ft,
with a range of more than 6,000nm unrefuelled and over
10,000nm with one refuelling, giving it the ability to fly
to any point in the world within hours.

While no aircraft is totally invisible to radar, stealth
aircraft make it difficult for conventional radar to
detect or track the aircraft effectively, increasing
the odds of a successful attack. Shapes & Designs How It Works? STEALTH B-2 BOMBER Stealth is technique in which we can make any object (almost)invisible.



Means very low observable (VLO) technology, in which object is made less visible to radar system, sonar, infrared and other detective methods.



A stealth fighter has to be stealthy in five disciplines:
radar, infrared, acoustics, smoke and contrail (visible condensation of water drops or ice crystals from atmosphere) . STEALTH Introduction STEALTH AIRCRAFT TECHNOLOGY Radar Absorbing Material(RAM) Plasma Stealth Tail Angle Effect A corner reflector is retroreflector consisting of three mutually perpendicular, intersecting flat surfaces, which reflects electromagnetic waves back to source.

So tail angle should be kept acute to decrease detection. Difference between conventional & stealth aircraft design When we are using normal shape



When using stealth technology. Engine position Normal fighter plane showing the engine.



Engines of the stealth aircraft are covered. Exhaust plume Exhaust plume of a normal plane.



Stealth aircraft without exhaust. Nanostructural composite material, absorbing without reflection radar wave.

R.A.M. is basically paint with which external surfaces are coated with.

These paints are Magnetic ferrite-based substance having ingredients dielectric, such as carbon.

RAM reduces the radar cross section making the object appear smaller. In this aircraft injects a stream of ionized gas
which envelopes aircraft due which most of RADAR waves are absorbed.




For system to work there has to be source
of energy which will ionize surrounding air, probably on leading surface, since resulting ions are in boundary layers & will follow airflow around plane. Situation of Stealth fighter aircraft in air forces all around world American F-22 Raptor is the only stealth aircraft in operation today. ADVANTAGES Stealth aircraft are invisible to radar .



Results in decrease in safety of plane.



Develops the military secretes . DISADVANTAGES 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 is high. Future of Stealth Technology In the future, stealth technology will not only be incorporated in fighters and bombers but also in ships, helicopters, tanks and transport planes. Black Hawk RAH-66 Video on Ultimate weapons - B-2 Bomber
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