Launcher
1) Cut 3 1x4 boards into two foot pieces, 1 into a 1 foot piece, and two 8 inch pieces.
2) Screw two 2 foot boards parallel on the other 2 foot board
3) On the end of the middle board, attach the 1 foot board with hinges.
4) On either side of the 1 foot board screw the 8 inch pieces on their side.
5) Screw the protractor onto one of the eight inch boards and measure the angles that you want your rocket to fly. Drill holes at those angles in order to hold the 1 foot board in place.
6) Put a male coupling on the end of the radiator hose, and a female coupling on the other end of the radiator hose.
7) Fasten the hose to the launcher with the two brass u-clamps on top of the one foot board.
8) Clamp the string to the female coupling on the top of the launcher. Lace the string threw the eyelets, so you can launch from a distance.
Rocket
9) Cut the top and bottom off of one of the two 600mL pop bottles.
10)
Tape the top of the cut bottle to the bottom of the
other bottle.
11) Tape the middle of the cut bottle to the bottom of the whole bottle.
12) Drill a hole in the pop bottle lid and insert a male coupling on the top of the cap to attach to the threaded pipe on the inside of the pipe. Seal with a rubber washer.
Launching The Rocket
13) Fill the whole bottle with the desired amount of water.
14) Connect the female coupling on the launcher to the male coupling on the rocket.
15) Adjust the angle at which you will be launching the rocket
16) Connect the air compressor to the male coupling at the end of the radiator hose.
17) Pull the string to launch the rocket.
18) Record the distance the rocket traveled before hitting the ground.
Hypothesis: If everything goes as we expect we think that when the rocket is placed at 50 degrees it will travel the greatest distance.