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Experimental Aircraft - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect segment exploring the future of aircraft such as NASA's new experimental plane, the Hyper X with a scram jet.

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Thanks Connie. Now that we know what pilots have to keep in their minds with today's aircraft, let's consider the future of flight. 00:00:00
Have you ever wondered what the airplanes of tomorrow will look like? Or how fast they will travel? 00:00:07
Will tomorrow's planes travel into space or beyond? 00:00:12
On today's show, we're going to learn how NASA researchers and engineers are using geometry and algebra to design, develop, and test future experimental airplanes. 00:00:15
What is an experimental plane? 00:00:24
Experimental planes, or X-planes, are tools of exploration that come in many shapes and sizes. 00:00:27
They fly with jet engines, rocket engines, or with no engines at all. 00:00:33
Which means NASA flies not only the fastest airplanes, but the slowest as well. 00:00:37
Some planes are too small for a pilot, and some are as large as an airliner. 00:00:42
The research conducted on experimental aircraft today gives us a glimpse into the future. 00:00:46
NASA is developing one of the fastest experimental X-planes ever. It's called the HyperX. 00:00:51
What is the HyperX? 00:00:57
The HyperX research vehicle is an experimental plane that uses this really cool engine technology called the scramjet. 00:00:59
Go for main engine start. 00:01:06
Unlike rockets, such as the space shuttle main engines, which must carry both fuel and oxygen, the scramjet will only carry hydrogen fuel. 00:01:09
It will take in oxygen out of the thin upper atmosphere as it travels along. 00:01:17
We call this kind of engine an air breather, and it will allow the HyperX to fly at incredible speeds. 00:01:21
In fact, the HyperX will fly at about 3,020 meters per second, which is about 6,750 miles per hour, or Mach 10. 00:01:27
What does Mach number mean? 00:01:35
Mach number represents how many times the speed of sound a vehicle is traveling. 00:01:38
Mach 1 equals the speed of sound, which is approximately 302 meters per second, or 675 miles per hour, at an altitude of 100,000 feet, 00:01:43
which is the test altitude for the HyperX. 00:01:52
Mach 2, which is twice the speed of sound, will approximately be 604 meters per second, or 1,350 miles per hour, at an altitude of 100,000 feet. 00:01:55
Mach numbers are used by NASA researchers to describe the speed at which a plane is flying. 00:02:05
Let's use algebra to show how to calculate the Mach number of the HyperX flying at 3,020 meters per second, or 6,750 miles per hour. 00:02:11
This algebraic equation shows that the Mach number equals the speed of the plane divided by the speed of the sound in the air, where M is the Mach number. 00:02:20
V is equal to the speed of the plane, and A is equal to the speed of sound in the air. 00:02:28
If the speed of the plane is 3,020 meters per second, and the speed of sound at 100,000 feet is 302 meters per second, then what is the Mach number? 00:02:33
That's right! 3,020 meters per second is about Mach 10, or 10 times the speed of sound. 00:02:44
We'll learn more about Mach numbers later in the show, but first, let me tell you about the HyperX. 00:02:51
The HyperX is designed as a flying engine, which means the airplane and the engine are one unit. 00:02:58
The unique shape of the airplane develops the lift necessary to keep the plane up in the air, so it doesn't need wings to produce lift. 00:03:04
The entire undersurface of the airplane is designed to act as part of the engine. 00:03:12
In order to test the scramjet engine, the HyperX is launched by NASA's B-52 and boosted by a rocket to its testing altitude. 00:03:16
It will then separate from the rocket, and the scramjet engine begin its test flight. 00:03:24
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Idioma/s:
en
Materias:
Matemáticas
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
272
Fecha:
28 de mayo de 2007 - 16:53
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
03′ 30″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
20.97 MBytes

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