Stealth Coatings Guide Canada

While there are huge visible flight innovations, there are also a few major invisible ones. Now there are special stealth coatings available that turns any aircraft into a radar evading stealth plane. Stealth coatings are also applied to many other surfaces including computer and phone screens and cars.

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Stealth coatings based on nano technology

A special nano coating makes planes, missiles, drones, and other aircraft almost invisible to radar. The paint doesn’t make aircraft disappear completely from radar instruments, but it is disruptive enough that it is very hard for equipment to register their signatures as incoming war craft.

So how does it work?

Radar works by sending out electromagnetic waves and seeing what comes back. If those waves strike a solid object, for example an incoming aircraft, these waves are scattered. But some of them return to the radar receiver, and a regular, repetitive returning of those waves produces a positive ID of an object. The nano-paint simply absorbs these waves and dissipates them as heat that scatters into the atmosphere. The radar might still pick up a few returning waves, but the signal is weak and irregular and generally wouldn’t register as an incoming object.

Cost efficient, but not perfect

Stealth coatings based on nano technology cheaper than buying a stealth aircraft and could produce a cost-effective means for entire fleets to add a layer or stealth to their tactical portfolios. Unfortunately radar technology is becoming more and more advanced and picks up even the weakest signals. This could mean that stealth coatings based on nano technology could not be enough.

Stealth coating airplane

Anti reflective coating based on sugar

The scientists developed a new type of stealth coating last year. This type of stealth coating is a lightweight anti reflective coating based on the structure of a moth’s eye that could make aircraft invisible to radar.

The secret to how it works

The secret to the new coating is the creation of millions of tiny hollow spheres of carbonized sugar, arranged in a tightly-packed hexagonal monolayer. These spheres absorb nearly all radiation used by military targeting radar and law enforcement speed traps.

A coating which is 100 per cent anti-reflective in visible light would appear as a shapeless black mass, while one which had this property in the microwave range would be completely invisible to radar.

The secret is the size of the biopolymer beads which form the hollows inside the coating, which at around 6mm are slightly smaller than the wavelengths of microwave and radar beams, and the thickness of the carbon walls that surround them.

Source: Dailymail

The world darkest material as stealth coating

A third stealth coating that is entirely different is Vantablack coating. Vantablack is invented by UK technology company Surrey NanoSystems. Vantablack is a deep black material that absorbs 99.96 per cent of the light that hits it. It is used to coat 3D objects, turning them into visually flat, black ‘holes’ without any sense of shape.

Vantablack’s first customers are in the defense and space sectors. Here the material is used to make a whole variety of stealth craft and weaponry. And also more sensitive telescopes that can detect the faintest of faraway stars.

The super black coating made its debut in space on a European micro satellite launched in December 2015. It has proved to be an excellent stealth coating in space.

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