Learn about the stories behind 10 extraordinary inventions. In this video, you'll learn about the B-2 stealth bomber.
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Male Speaker 1: We reduce radar by actually absorbing it into the very leading edge of it. Male Speaker 2: There is a specialized coating, a paint if you will is pained on the aircraft, it is electrically conductive, it helps to disperse the energy across the aircraft along the trailing edges and the leading edges of the aircraft basically the front of the wing and the end of the wing is a radar absorbing structure that helps absorb the radar. Now some of the other characteristics of Yellow is going to of course the shape, the aeroplane is designed to have a low profile in the sky to look like just a line harder to detect from far away. The color is designed primarily for night to make it harder to see during night missions although it can't fly during the day and do bombing missions. Their engines are placed further down into the body of the aircraft to reduce the noise and it may also has an exhaust system if you will giant muffler to make it harder to hear. If the aeroplane can be seen by a heat source like take for an example NA-15 with active burner it's like having a big giant flash light in the sky. This aeroplane is designed to lower the heat coming off of the back of the engines; there are some tiles on the back of the aircraft that are basically the same thing as used on the space shuttle. If you were to take one of these tiles, put it in a oven get a going red, by time it pour out the other end is going to be cold to touch. That's how well it disperses heat. Male Speaker 1: Right, this is the B-2 leading edge. It has got a lot of functions but one of the main function is the coatings that are on it, are actually elastic or kind of rubbery if you will because if they would run through a hail storm or you think such as that the head which is bounced right off of it and it wont effect the coatings too bad. There were several types of coatings on it, the most important coating would be the conductive coating and because it also absorbs radar and disperses the radar through the entire jet. Male Speaker 2: This aircraft unique to other aircraft as everything is completely -- with the surface of the aircraft. For example this trapezoid figure you can see right here is actually one of the lights and it drops out from the bottom of the aircraft so the aircraft can be seen at night but when its dozing into fly and its going over a hostile area that light is retracted. Now not only due to the lights coming and out there is also different -- and part of the radar that can become flush. All the doors also close flush with the surface of the aircraft not only does it help with the springiness of the aircraft flying through the air but also has lots to do with the actual connectivity of the aircraft keeping it stealth. Male Speaker 1: The difference between B-2 and other aircraft are all the trailing edge. Male Speaker 2: All of these surfaces you see right here there are at different angles, have different reasons for being here as far as controlling the aircraft, the further most tier right here you can see one is hanging down is actually the rudder of the aircraft that helps it turn left to right and then the three coming inward from this right here is basically coming into the fuselage of the aircraft are called elevons, they worked either together or they can all be separate and they help control the aircraft -- turning and that kind of thing. This structure you can see right here, this is called the glass which stands for the -- and it is all computer controlled and it actually flutters like a dove tail in the air as the aeroplane thinks in terms of flies. It keeps it from basically falling out of the sky. Male Speaker 1: This is actually where all of the weapons are stored and this is where they drop from the aircraft, you can actually look up in there but that's where they do or damage and that's where they come from.

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