My rocket was designed around weight; I wanted to keep the rocket itself light but still be able to have enough thrust and stability to travel a reasonable height. I used a single 2 liter soda bottle for the water and air storage and added another half of a bottle to add a cone for aerodynamics and height for stability. I chose to test the amount of water that I stored in my rocket because it is one of the most varying but important variables. My question was if The amount of water in the rocket changes, will the height that the rocket travels be different? My hypothesis was if the amount of water changes the rocket’s height then about half filled with water will make it travel the highest because there is enough room for the air to be kept at our desired pressure but also enough water to propel the rocket for a reasonable amount of time.
As a group we had some issues with Kaden’s rocket and collecting data for it due to the explosion so we basically used my rocket for all the launches and variable testing. However I think we worked well together and made a final product that performed it’s best.