Bottled Rocket Model

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~Introduction~

 

The odds of me coming into the rocket business, not knowing anything about rockets, not having ever built anything, I mean, I would have to be insane if I thought the odds were in my favor.” -Elon Musk. According to biography.com, “South African entrepreneur Elon Musk is known for founding… SpaceX.” Here he describes his beginning experiences. However, although the path may have been difficult, he was able to find success. Therefore, I am determined to find a way for my beginner’s rocket to launch at a decent altitude. So, what is a rocket? A rocket is a cylindrical projectile in which is propelled to launch towards a great distance or height. The rocket is pressurized with a latch. Once released, the air pressure pushes the rocket. Newton’s 2nd law also states force= mass x acceleration. The more mass an object contains, will need more force to move it. Therefore, reducing the mass of a rocket for force, and creating good stability for direction should allow a rocket to reach a high altitude. A rocket containing less mass will accelerate faster, leading to a higher altitude. This includes having a robust rocket body, and stable fins will keep your rocket slim and sharp. Maintaining a well-built structure is important for your rocket to accelerate more quickly.

~Body~

VI a) Having the body of the rocket be robust and light weighed, reduces mass. My rocket was composed of 1½  1 liter plastic bottles. It had a mass of 0.106 kg, and a force of 0.25 Newtons. The 1 liter was used as the body, and the half of the other bottle was used for the nose cone. This reduces mass, for it gives it a slimmer shape, and a well-shaped nose cone. This will allow the rocket to follow a straight direction upward. However, the mass was surprisingly 0.106 kg. Meaning that maybe too much was added on the rocket, but in the wrong places (away from the nose cone). But the shape of the bottle did allow our rocket to go higher than perhaps it should have. VI b) Group 9’s rocket was large, and had a different shape with less mass; causing more force to be used. The other group’s rocket was composed of a 2 liter and a 1 liter bottle. They had a total mass of 0.80 kg and a force of 0.78 Newtons. The 2 liter bottle was used as the body, while the 1 liter was used for the nose cone. Although the body of the rocket was a 2 liter bottle, it managed to have less weight than mine. The structure was also tightly wrapped, making it sharp and firm. But if they had used a 1 liter for the body, and kept their rocket straight, they could have gone farther as it would have reduced even more mass. This made them have more force- a total of 0.80 Newtons; as their rocket was large.

 

VII a) Making few small fins, and placing them evenly will make the rocket stable, allowing high altitude. My rocket contained 3 small find, and placed on the bottom to what we thought was evenly placed and spread out. The fins had an approximate area of 4.5. And were made of cardboard. However, observing closely you’ll see that they aren’t placed accordingly and evenly. Hence, this may have caused the stability of the rocket to be a little weaker. It is just as important for the rocket to be stable and balanced. What it might have lacked was sufficient mass on the nose cone, or for a balanced placement of the fins. VII b) Group 9 had a couple of fins, a different size, and different placements. However, once again their rocket had a higher altitude. Perhaps their rocket was more stable. The other groups’ rocket had 8 different shaped fins, placed on the top and on the bottom.The fins are of a curved shape pointing downwards. They were made of cardboard. They were spread out evenly as four were at the top, while four were at the bottom. According to Rocket aerodynamics — Science Learning Hub, “The nose cone and fins of a rocket are designed to minimise drag (air resistance) and to provide stability and control (keep it pointing in the right direction without … However, this also increases drag, so there is an optimal size for fins so that the rocket has enough stability without having too much drag. Although this groups’ rocket had a lot of fins for a rocket, it still managed to get at a high altitude. Knowing how much air resistance can’t be known, but with the mass and force they contained, they could have gone a bit higher. So perhaps air resistance was placed on the rocket. Yet the fins’ great stability, firmness, and light weighed must have allowed the rocket to be balanced and have an upward direction set. This is a way they received a higher altitude, by being able to move upwards straightly.

 

~Conclusion~

 

A rocket containing less mass will accelerate more quickly; prompting a higher height. This incorporates having a strong rocket body, and stable balances to keep your rocket thin and sharp. Because when mass is reduced, less force is needed. However, as long as a rocket has a low mass, a medium sized rocket can still go high. Making fins is important, so you don’t cause too much drag, but give your rocket stability. A greater fin number will keep the rocket from going as high as it can. Keeping up a well-assembled structure is vital for your rocket to accelerate all the more rapidly. Perhaps this rocket didn’t reach the highest altitude, but the experience was enterprising. Simply building the rocket was able to add to the body of knowledge. Allowing one to understand more ideas associated with rockets. These notions could lead to growing a passion for a subject of science, physics, mathematics, etc. Or in this case, experimenting more rockets and improving within each one. Hence, creating a step to success; learning something new you never knew.

~Materials~

  1. 1 liter plastic bottle
  2. ½ liter plastic bottle
  3. 3 isosceles shapes fins with a width of 3 cm and a length of 3 cm.
  4. Manila Paper
  5. Clear duct tape
  6. Light weighed decorative paper
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