Bottle Rockets! You will need to take notes.

Design, construct and launch a rocket made from empty plastic soda bottles which will fly for a maximum period of time. Your rocket may not weigh more than 200g THE CHALLENGE: Carry a raw egg safely to the ground Your mission:

A list of DON'Ts Scratch, cut or puncture the pressure chamber! (the bottom bottle that will be launched) Don't use... hot/boiling water Knives/Razors Chemical solvents Hot glue or super glue Even the smallest of scratches or cuts in the pressure chamber can result in an explosion. Besides the risk of physical injury

Parts of a Bottle Rocket Pressure chamber (soda bottle) Nose cone Fins Parachute/recovery system

 This is the MOST important part of your rocket. It should be a complete, unpunctured and have no cracks!  This is the part of the rocket that will be pumped full of air. It needs to be able to handle about 40psi of air pressure Pressure Chamber

 All rockets need a nose cone  Nose cones are used to reduce drag and protect the payload (cargo).  Here are some examples of nose cones. You may create your own or use one of these.  Remember nothing sharp!! Nose Cones

"The Flounder". It is the easiest to make but lacks flight stability. The cone is made from poster board or tag board. You can make the cone by simply cutting a large circle out of the poster board (about a 6 inch radius). Attach to the bottle with tape or similar adhesive.

The "Bertha" nose cones are made by cutting the bottom off a spare bottle and attaching the top portion onto the pressure chamber. One strip of tape should be enough to hold the cone on. (Note: Never cut the pressure chamber)

The "Space Needle" style of nose cone can be made from a spare bottle, empty paper towel roll, and a tennis ball or racket ball. This type of nose cone adds a great deal of inertial mass to the rocket and makes it really stable.

 Fins are the guidance system for your rocket. Without them a rocket would tumble end over end  The minimum number of fins on a rocket is one  Fins may be made out of:  Milk or Juice bottle  Foam trays  Unused election signs (Only after election is over)  Cardboard  Corrugated Plastic Fins

Fins tend to be the single greatest downfall of many young rocket builders. With the incredible speeds and frightful acceleration generated at launch, many fins get ripped off the rocket body within a fraction of a second (Thank you So. Cal Bottle Rocket Association) F.Y.I.

 Remember to name your rocket and decorate it so that we can tell it is YOUR rocket Making your rocket unique

1.Two Bottles 2.1 Fin 3.Nose Cone 4.Water Things you MUST have:

 Lengthening the rocket adds stability  Experiment with different fin shapes  Try different body shapes  Try to make body smooth (no kinks with tape).  Do not use hot glue gun to fasten parts of your rocket together.  Use small pieces of tape (in case you mess up you can easily remove it).  Do not leave bottles in hot car. Tips

 To get an “A” on this project:  You must have a successful launch  Rocket must go at least as high as you are tall (some of you have an advantage here)  Follow all guidelines  Bonus points:  Longest flight time (5 points)  Time begins when your bottle leaves the launch pad and ends when the last part of your rocket hits the ground  Have your egg not break (5 points)  Highest Grade possible 110% Grading