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Icy Research - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect Segment that explores the Joint Runway Friction Measurement Program that investigates aircraft losing traction on icy runways.

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Good science boils down to making as many high-quality observations as possible 00:00:00
and then analyzing and interpreting them. 00:00:05
At NASA Langley Research Center in Hampton, Virginia, 00:00:08
a five-year research program called the Joint Runway Friction Measurement Program is underway. 00:00:10
This international effort is investigating aircraft losing traction on icy runways. 00:00:17
This icing research program is having some groovy spinoffs. 00:00:22
Let's meet with Tom Yeager and learn more about runaway runways. 00:00:26
Thanks, Shelley. 00:00:31
I'm standing here this morning in our aircraft landing dynamics facility shop area. 00:00:32
Behind me you can see one of our test carriages. 00:00:37
We've got a display here of a landing gear system that we're looking at to evaluate 00:00:40
from a standpoint of reducing the loads going into the fuselage. 00:00:45
On my right here is a display showing some of the work that we've done 00:00:51
to support the shuttle tire program that got started in the mid-'70s 00:00:54
and has been quite successful since then. 00:01:00
We've done several modifications to the runway down there based on research data 00:01:03
that we obtained here at our aircraft landing dynamics facility in Hampton, Virginia. 00:01:08
We've also done work in modifying the tire design and the brake unit 00:01:14
that's used on the shuttle that's being flown later on this month from Kennedy Space Center. 00:01:19
We do a lot of work looking at aircraft tread design, how the grooves are positioned, 00:01:28
and minimize the hydroplaning potential that can occur during aircraft landing 00:01:33
and takeoff operations on wet runways. 00:01:39
You're viewing a typical aircraft landing gear tire touching down on a contaminated or ice-covered surface. 00:01:43
And due to the reduced friction capability between the tire and the ice, 00:01:51
it takes a considerably long time for this tire to spin up to a speed 00:01:56
that's equal to the forward motion of the airplane. 00:02:01
We're currently involved in the fourth year of a five-year program 00:02:04
with a partnership with the FAA, Transport Canada, the National Research Council up in Ottawa, 00:02:09
the National Defense Department out of Winnipeg, 00:02:16
as well as several aviation organizations supporting this activity 00:02:21
where we're evaluating aircraft braking performance under winter conditions. 00:02:26
These conditions include snow, ice, slush, and water. 00:02:32
And to date, the majority of the tests have been taking place in North Bay, Ontario, 00:02:37
which is about two and a half hours north of Toronto. 00:02:42
We've evaluated braking performance of a Falcon 20, a de Havilland Dash 8 airplane, 00:02:46
an FAA Boeing 727 airplane, and a NASA Boeing 737 airplane. 00:02:55
Coming up in this program, you'll be involved in a classroom experiment 00:03:02
that will give you a better idea of how the coefficient of friction influences the motion of two objects, 00:03:07
for example, pavements and tires. 00:03:14
In our work here at the track facility, we've identified the fact that the higher the friction coefficient, 00:03:17
the shorter the stopping distance is for an airplane operating on a runway 00:03:24
and the less chance he has of going off either the side or the end of the runway. 00:03:28
Some of the equations that determine this behavior of vehicles operating on pavement surfaces 00:03:33
will be explained to you in the classroom experiment. 00:03:40
And I want to wish all of you good luck in conducting that experiment. 00:03:44
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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:
375
Fecha:
28 de mayo de 2007 - 16:52
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
03′ 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:
23.15 MBytes

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