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Gynkana atmosférica_Paracaídas - Contenido educativo
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Diseño de paracaídas para un CanSat
Welcome to CANSAT EVA
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Let's talk about parachute design.
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Parachutes are vital parts of any CANSAT mission.
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They are often regarded as simple pieces of public compared to the complex electronics that lies within the CANSAT.
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But that's a big mistake.
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Without a well-designed parachute, your concept might not have time to complete its scientific
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objective, or rather yet, it could crash land.
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As in any other engineering project, our concept must meet some specific requirements, such
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such as the size, mass and even more important, the concept's design speed must not be lower
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than 5 ms or higher than 12 ms for safety reasons.
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For recovery reasons, a maximum flight time of 120 seconds is recommended.
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Without a well-designed parachute, these requirements cannot be met.
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Let's try to understand our design equation.
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First, we are going to draw the free-body diagram to analyse all the forces acting on
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our contact.
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The two main forces acting on it are the weight due to gravity and the drag force due to the
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resistance. Combining these equations and considering Newton's laws, we can get to
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the design equation. In the fall, the cansat is dropped, then the initial
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velocity is zero and the only force acting on it is gravity. As it falls, the
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velocity increases and the drag force increases as well. Finally, both forces
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are balanced and the terminal velocity is reached. From this point on the cancels
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will form at a steady rate. Combining these forces we reach to the design
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equation where A is the canopy surface area equals 2 times the mass times the
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acceleration of gravity divided by the product of the air density, zv, the drag
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coefficient and the square terminal velocity. Canopy surface area can be
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changed by making the parachute smaller or larger and the drag coefficient can be
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changed using a different style of parachute. Drag coefficients are
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are determined experimentally. We are going to design a flat octagon parachute.
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Applying several geometric equations, we can reach to the length and the height needed
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to draw a template of the triangles. With the 8 triangles joined together, the complete
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template of the flat octagon is ready to be used but there is an easier way to
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get our parachute ready. We will show you how to do it using a little bag. The first
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step is to fold it in half so that you will make a square. Cut the remaining
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part to get a complete triangle so with a square fold it in twice in half fold it again and again
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and then cut it so you have a triangle cut the tip to make the spill and there it is your canopy
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is ready. Cut a piece of thread. Join the thread to the corners of the canopy using
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fellow tape. Do the same with the other three pieces of thread. Congratulations!
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your parachute is now ready
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- Idioma/s:
- Autor/es:
- María Tamés Esteban
- Subido por:
- Maria Jesús T.
- Licencia:
- Reconocimiento - No comercial - Compartir igual
- Visualizaciones:
- 35
- Fecha:
- 20 de marzo de 2023 - 9:08
- Visibilidad:
- Público
- Enlace Relacionado:
- https://esamultimedia.esa.int/docs/edu/T10_Parachute_Design.pdf
- Centro:
- IES PRINCIPE FELIPE
- Duración:
- 05′ 40″
- Relación de aspecto:
- 1.78:1
- Resolución:
- 1920x1080 píxeles
- Tamaño:
- 126.90 MBytes
