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Group B2 Week 4

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by

Kelsey Drzewicki

on 29 July 2016

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Transcript of Group B2 Week 4

We decided to split up again but also sometimes switch and help each other with their parts.
Scratch Simulations
https://scratch.mit.edu/projects/116259858/
3D Drawing with SketchUp
Model Rocket
Engineering Principles
The type of engineering used was aerospace engineering, the type of engineering involving the design/construction of aircraft and spacecraft.
The Engi-Fars' Final Week at USC
We divided into three groups:
The RC Plane
The Model Rocket
The Bottle Rocket and Glider
Our Plan
Chris, Kelsey, Johnathan, Larry, Aziz, and Nick
Bottle Rocket and Glider
We had trouble securely gluing the fins on, but another group helped us and told us hot glue worked for them so we tried it and it worked.
We had trouble figuring out how to attach the glider to the rocket, since the glider was almost the same size as the rocket. We ended up taping the glider very loosely to the side of the rocket hoping it would release.
We also had trouble with the arduino release of the glider since we couldn't figure out a deploying mechanism.
We also couldn't get our parachute to fit in the nose of the rocket.
RC Plane
Our Parts
Kelsey: Prezi, Website, Scratch Simulations, RC Plane

Chris: RC Plane

Larry: Model Rocket

John: Model Rocket

Aziz: Bottle Rocket

Nick: Bottle Rocket and Glider
Project 1
Project 2
Our Plan
Our Parts
Kelsey: Prezi, Proofreading, 3D Model

Chris: Sketchup

John: Paper, Research

Larry: 3D Model

Aziz: 3D Model

Nick: 3D Model, Scratch
Engineering Principles
In this project we used chemical engineering, the type of engineering that involves working with chemicals, making synthetic materials, etc.
For the plane we mostly followed the instructions but we rounded a few extra parts to make it more aerodynamic
We had trouble with pieces going missing, but we were able to eventually find them
We also had problem with the parts not being cut smoothly, so we had to slow down and cut more carefully
We had calculate the center of pressure, shown to the left.
We also had to calculate the center of gravity, which in order to do so we balanced the completed plane on our finger.
In order to make sure the plane was stable, we made sure the center of gravity was before the center of pressure
The center of pressure was in front of the center of gravity and made the rocket unstable. To try to fix this we added more weight to top of the rocket and decreased the cone area.
The rocket ended up being too heavy, but we were unable to fix this.
On launch day the streamer didn't deploy, so if we had time we would fix this.

https://scratch.mit.edu/projects/116309943/
Our plane didn't fly well and we believe it was either due to the operator of the controller or the motor didn't provide enough thrust
The calculations for the center of pressure for the model rocket are shown to the left.
We wanted to get the center of pressure behind the center of gravity, so the rocket would be stable, but we were not able to do this, even when we added weight to the front of the rocket and decreased the area of the nose.
The center of gravity was determined by balancing the rocket on our finger.
Our rocket/glider didn't go anywhere because, when the tether was pulled, it just exploded shooting water and the fins off. If we had more time we would go back and see calculations to see what went wrong.
Proposal
Our first proposal eliminates the need of freshwater for household toilets by directly using saltwater from an oceanic environment as a water source instead. To further decrease freshwater consumption, processed grey water (water from sinks, showers, etc. that has not come into contact with feces) combined with processed storm water will be used as an irrigation source. (“Greywater Action”)
Scratch:
Paper:
https://drive.google.com/open?id=1zqW--d-EOmg2Szr6kcVXtsFTkZr5eoloEhee-lXC3HA
3D Model
https://scratch.mit.edu/projects/116376831/
https://scratch.mit.edu/projects/116378754/
Full transcript