Alex Duncan
Water Rocket

  1. Defining problem :

The problem was to get a rocket to last in the air as long as possible.

2. Brainstorming

the rockets are in order




These were the base for my three original designs. Apollo was the most successful rocket i had followed with Ham Rocket then Doo Doo. Doo Doo was my first design and not a good one. From there i made large improvements.

3. Researching and Generating ideas.

Ideas i had for the rocket were to have a light frame while still having enough mass to launch a good distance. A large parachute size would also be a necessity. The first rocket was made by the greeks.NASA began on October 1 1958.

Drag- made from air resistance. Lift- used to stabilize and control a rocket. Thrust- this creates lift off or upward movement. Weight-increased mass and or density. Roll-is the rocket twisting around the axis. Pitch-rocket moving up and down. Yaw-similar to pitch but the nose spirals.

Structural system- the rockets body system working together. Propulsion system- is the rocket launch system is uses liquid or solid fuel. Guidance system- control lock as maneuvers and stability. Payload system- what the rocket is carrying. Recovery system- allows the rocket and or the payload to land unharmed.

Traveling to space

Troposphere, Stratosphere, Mesosphere, Ionosphere. These are four layers that make up earth's atmosphere.

The first law of motion “objects in motion will stay in motion unless acted on by an outside force”.The second is something like Force is equal to mass, to increase acceleration increase force or lose mass. The third is based around every action there is an equal and opposite reaction. Thrust, Weight, Drag, and Lift are the four forces that affect rocketry.

4. Criteria and Constraints

Criteria for the rocket would have to be the materials and the parachute. The constraints would be weight, time, resources, number of fins, nose leng, and air pressure.

5.Exploring Possibilities

I have locked into the different rocket designs and believe my design is a good one and close to the design of the number 1 design. My rocket has 4 fins with wide flat bases to help slow fall and increase the static margin.

6.Selecting an approach

I will probably make a design as close to Apollo 1 as possible. also making the rocket light is a priority.Between my three designs Apollo 1 was by far the best. Apollo lasted 5 more seconds than HamRocket and 10 or more seconds the DooDoo. It wasnt the cheapest but it was the lightest associating with the materials.

7. Developing A Design proposal.


Im going to make my design similar to that of Apollos 1. I designed this rocket with flat wide wings. I made a small transition cone to have a lower wait even tho its more resistance. I made a long neck and large nose to increase the static margin of the rocket.

8.Making a model or prototype



These were my three designs and Apollo ended up being my final rocket. The Apollo i built was diffrent from the one i designed on White box learning.

9.Testing and evaluating the design

When we launched our rockets my reached a high altitude. This high reach allowed my rocket to obtain a longer time that ended up being the best in the class. I modified the nose so that it has a cone of its own that on the descenct acted as a small parachute. I used another bottle top as my cone tube and i believe it hard great rresults.

10.Refining the design

Some things i would probably change is the shape of my fins and make a smaller parachute that would deploy.

11.Creating or making it

If i sold these rockets pre built i would use a more official looking material for the wings that followed the same color scheme. Next i would change my parachute size so that it would have a greater chance of deploying. i would sell them in cardboard and clear plastic boxes and they would cost about 50 dollars. If i sold them in pisces which is what i probably would do. i would have three different ways you can design the rocket and multiple parts so peoples rockets aren't the same. I would put decals in the box so people could add more diversity yo it as well. i would probably create a better body for the rocket than a plastic bottle or leave instructions to get your own bottle. The parts unbuilt would cost from 50 to 40 dollars.

12. Communicating processes and results

my rocket had a flight time of 9.6 which ended up being the best time in the class. This was a good result for me and i was pleased.

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