Do Not Open by John Farndon

Author:John Farndon [Farndon, John]
Language: eng
Format: epub
Tags: General, Reference, Juvenile Nonfiction
ISBN: 9780756662936
Publisher: Penguin
Published: 2010-05-17T00:00:00+00:00

B-2 Spirit

The Northrop B-2 Spirit first flew

in 1989, and represented a giant

leap forward in stealth technology.

It is one of the most expensive

planes ever built.

Invisible coating

Shield of secrecy

The B-2 Spirit is coated in Radar

Scientists are now working

Absorbent Material (RAM)—a special

on a special shield that will make

coating that allows radar waves to soak

a plane completely invisible by

into it instead of reflecting them, making

diverting light waves around it.

the plane “invisible” to radar.

Normally, an aircraft’s presence can be detected through radar,

which works by beaming out radio waves. These radio waves then

bounce back off any object they come across, revealing the object

and its position. To avoid radar detection, stealth technology uses a combination of special materials and multi-angled surfaces to “hide”

the aircraft. This can reduce the chances of a radar signal bouncing Silent running

back off it. Aircraft designers are finding increasingly creative ways The B-2 has various devices to

reduce the sound of its engines,

to avoid radar detection, while radar designers look for more

as well as reduce the effect of

effective methods to beat those radar-blocking systems.

the sonic boom—the noise

it makes when it reaches

the speed of sound.

130 131

Stealth technology

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