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Space Shuttle Pulley

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Sci Files segment describing how NASA uses pulleys to attach the space shuttle to the 747 for its cross-country trip from California to Florida.

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Hi, I'm Kimberly Ennix, an aerospace engineer working here at the Propulsion and Performance 00:00:00
Branch at NASA Dryden Flight Research Center. 00:00:08
Wow, an aerospace engineer. 00:00:11
What does an aerospace engineer do? 00:00:14
I do flight test research on different types of planes. 00:00:16
We actually put our experiments on real jet engines, install the engines in experimental 00:00:19
planes and then we go out and fly them. 00:00:24
That sounds really cool. 00:00:27
Add that to the career list. 00:00:29
We're doing a project and we need to learn more about pulleys. 00:00:30
We saw on the website that NASA uses pulleys to lift the space shuttle onto the back of 00:00:33
a 747 plane. 00:00:37
How can pulleys help lift the space shuttle? 00:00:39
Well, to lift the space shuttle, they use the mate-demate device known as the MDD. 00:00:41
The MDD is this large gantry-like steel structure where the space shuttle receives post-flight 00:00:47
servicing and is prepared for the ferry flight back to NASA Kennedy Space Center. 00:00:54
The MDD has two 100-foot towers that are connected at 80 feet by a horizontal structure. 00:00:59
What does the horizontal structure do? 00:01:05
It controls and guides a large lift beam that attaches to the space shuttle to raise or 00:01:07
lower it. 00:01:12
There are three large hoists or pulleys that are used to raise and lower the lift beam. 00:01:14
Those must be some big pulleys. 00:01:19
Yes, they are. 00:01:21
The shuttle can weigh up to 232,000 pounds, but each of the three pulleys has a 100,000-pound 00:01:23
lift capability. 00:01:29
Operating together, the total lifting capacity of the three pulleys is 300,000 pounds. 00:01:31
But, for safety reasons, we don't exceed 240,000 pounds. 00:01:36
Wow, that's about 120 times. 00:01:41
You're good at math. 00:01:46
There are also two equipment pulleys built into each tower at the 60-foot level. 00:01:47
Each pulley is capable of lifting 10,000 pounds. 00:01:52
Sounds like pulleys can lift a lot of weight and are pretty important at NASA. 00:01:55
What happens to the space shuttle once it's lifted? 00:01:59
Well, the space shuttle is then placed on special mounts atop the fuselage of the NASA 00:02:02
747 shuttle carrier aircraft. 00:02:07
It is then flown back to the Kennedy Space Center. 00:02:10
The space shuttle actually gets a piggyback ride. 00:02:13
About how long does it take? 00:02:16
Depending on the weather, it usually takes one to two days. 00:02:17
Thanks, Ms. Enix. 00:02:21
You've been a big help. 00:02:22
You're welcome. 00:02:23
Call if you need anything else, and good luck. 00:02:24
Wow, that is so cool. 00:02:27
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Idioma/s:
en
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:
579
Fecha:
28 de mayo de 2007 - 15:32
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
02′ 29″
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:
15.10 MBytes

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