# Water Rocket

### Water powered rocket bottle.

3. Researching and Generating Ideas

Rocket motor

Liquid fuel (consist of alcohol and liquid oxygen)

Drag- Is created by air resistance

Lift-A side force used to stabilize and control the direction of the flight

Thrust- the force that produces lift-off

Weight- A combination of factors affects the weight of a rocket and can include a lot of stuff.

The rocket twist upon its axis

Lateral axis- up and down movements occur along the lateral axis

Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed on it.

Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed on it.

For every action, there is an equal and opposite reaction.

• Lift acts through the center of pressure. On a rocket, lift is a side force used to stabilize and control the direction of flight. This is quite different from the concept of lift as it relates to an airplane. On an airplane, lift is a force that overcomes weight to enable flight. In the Rockets 2.0 application, we will simply discuss the concept of stability to avoid confusion.
• The distance between the center of gravity and center of pressure is known as the static margin.
• The center of gravity is the "balance point" of the rocket.
• The center of pressure is the point through which the drag force acts and any wind forces
• The distance between the center of gravity and center of pressure is known as the static margin
• A recovery system is part of the rocket that allows the rocket to safely return to earth after launch.
• weight = mass x gravity
• mass = density x volume
• volume = thickness x width x length

Citation/References: White box Learning

I tried making my weight as low without messing with my static margin. It seemed to do me better when my fins and cones sizes are less weight but are suitable for my design. Changing my fins increased my static margin.

6. Selecting an Approach

Constraint

Sketch 1

Sketch 2

Sketch 3

Air Pressure

+

1

2

Nose length

2

2

1

Parachute size

+

1

2

Fin/Launch Interference

+

1

2

Fin Validation

+

-

1

Total

14

6

8

9. Testing and Evaluating the Design

Test Performed        Test Results

Rocket Launch           3.9 seconds

10. Refining the Design

I would create bigger fins for my bottle rocket, and glue them on straight. I would also find better and more stable materials for my parachute to properly deploy.

11. Creating or making it

Making sure I have selected the rights materials for my rockets parachute to properly fly and for the parachute to deploy.