Firstly, I continued to search for projects similar to this that people had done and linked them to padlet. The closest one I found was a 600-gallon fish tank that has quite detailed instructions.
Originally, I had planned to only have a single thick sheet of plywood for the sides of the dunk tank. However, after looking at wooden fish tanks and wooden bath pools, and realized that there were far better alternatives to my original design. With wooden ribs and a thin sheet of plywood, I can achieve the same effect for a lower cost. The cost of plywood goes up the thicker it gets, and long blocks of pine are fairly cheap and strong. Additionally, I have found out that the acrylic I have access to is not big enough to cover the entire front portion of the box, so I have decided to add a wooden brace to the middle and have 2 pieces of acrylic.
The dimensions of the tank: 1.2×1.2×1.4
*The supports on the outside of the tank will be parallel to the sides, instead of perpendicular as depicted in the diagram.*
I will use a locking clamp attached to the back of the tank as the mechanism to release the seat. There will be a metal, PVC or wooden rod that is next to the release lever of the clamp. When the target on the end of the rod is hit with a ball, the rod will then push against the release lever, opening the clamp and allowing the string holding the chair to get released. The person on the seat will then fall into the water. I may also have some netting in front of the tub so that the person who will be dunked is not in any danger.
My plan is to order all the materials I need next class, then work on the release mechanism and seat with the materials I currently have access to.
Fiberglass sheets for reinforcement-fab lab
Epoxy (a lot)
Metal rod-just use PVC- fab lab
Silicon sealant-fab lab
Wood screws-fab lab
Large sheets of plywood (There may be some at school)
Large sheets of acrylic-fab lab
I will start to work on the rest of the tank as the parts continue to arrive. I will first work on the seat and the release mechanism. As the clamp arrives, I will attach it to the rest of the release mechanism, allowing the release mechanism to function. As the plywood and wooden beams arrive, I will begin to cut and assemble them to make a box, then use epoxy and silicone sealant to waterproof the inside seams. After that, I will use fiberglass to reinforce the inside of the box, then put the clear acrylic pieces in the front.