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Aerodynamic Forces - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect Segment that explains aerodynamic forces that affect aircraft performance and how these forces relate to each other.

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Explaining four forces which affect aircraft performance and how they relate to each other. 00:00:00
Van, I want you to meet my friend. This is Mike Logan. 00:00:08
Hi. Hi, Van. 00:00:12
He works here at NASA Langley Research Center in Hampton, Virginia, designing aircraft. 00:00:13
Oh. So, Van, Jennifer tells me you're having a problem with your vehicle. 00:00:17
Oh, I sure am. I belong to a band called The Noodles, and we bought a van to carry our equipment to our performances, but it keeps breaking down. 00:00:20
Jennifer says it might be an aerodynamic problem. Can you help? 00:00:27
Sure. We here at the NASA Langley Research Center have been studying aerodynamics since 1917. 00:00:31
Every aircraft is designed with a specific purpose in mind, like carrying people or cargo. 00:00:36
No matter what the purpose is, all aircraft designs must consider four basic forces, lift, weight, thrust, and drag. 00:00:40
Lift is the force that moves an airplane up when the air flows across the wings. 00:00:48
Weight is the effect of gravity pulling an airplane down. 00:00:51
The force that pushes a plane forward is called thrust. It's usually created by a plane's engine or propeller. 00:00:54
The last force, drag, slows an airplane down as air rubs against the plane's surfaces. 00:00:59
It's a lot like the friction created when a tire skids across the road. 00:01:04
We measure these forces by creating scale models of our designs and then testing them in wind tunnels. 00:01:07
At NASA Langley alone, we test designs in over 20 different wind tunnels. 00:01:12
So, Van, exactly what happens when you take your vehicle out? 00:01:16
Well, every time we load the equipment on top of the van, it doesn't have enough power. 00:01:19
And every time we load our stuff inside the van, it helps a little, but it's still a slug. 00:01:23
Aerodynamically speaking, it sounds like you may be having a problem with drag, which is causing your engine to overwork. 00:01:28
I think a wind tunnel test might help us to understand your problem better. 00:01:33
I'll call a colleague of mine, Hector Soto, who designs measurement tools used in wind tunnels and arrange for the two of you to meet. 00:01:36
In the meantime, I'll go back to my office and work on some possible solutions to your problem. 00:01:42
All right. Yep. 00:01:46
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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:
627
Fecha:
28 de mayo de 2007 - 16:53
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
01′ 50″
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:
11.27 MBytes

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