Short page with requirements!
Challenge
-Your challenge is to build a trebuchet that can accurately aim into the 6"x8" Bailey/doorway of your castle and destroy the not so innocent Royalty (eggs) that have not been EggBlocked as well as potentially decimate the cardboard castle!
You will need to research the physics and math needed to build a trebuchet that is accurate and safe to use.
Design Requirements
-Full size drawn plans required of at least the side view
-Math to determine the length of throwing arm, sling/pouch length
-release pin angle and length
-math to determine approximately (or accurately) how far it will throw your objects. You must have this before you are allowed to throw anything!
-Need a triggering mechanism or safety hook!
-Axle must be 12"/30cm from the ground. No more no less!
-"footprint" of trebuchet can be a maximum of 24"x18"
-Everyone will have the same size counterweight (or pretty close in size)
-pouch/sling MUST be able to hold the golf ball and shoot it safely
-Trebuchet to castle distance will be 20 feet minimum but you can design it to shoot farther
Materials given
-10" of 3/8 steel rod for axle (which must be 12"/30cm from the ground
-3/4" square pine strips for frame
-runway material
-cement and wire to create counterweight
-fasteners (eye hooks, etc)
-paint to make it look fabulous
-string (you may bring in your own materials if you don't like ours) for the sling
Materials not given
Material for a pouch
Extra golf balls (you will get one and only one!)
How you are being Marked
-Marking will be based on research, design, build quality, and accuracy of your trebuchet. Please refer to the detailed marking rubric handout in class
-Your challenge is to build a trebuchet that can accurately aim into the 6"x8" Bailey/doorway of your castle and destroy the not so innocent Royalty (eggs) that have not been EggBlocked as well as potentially decimate the cardboard castle!
You will need to research the physics and math needed to build a trebuchet that is accurate and safe to use.
Design Requirements
-Full size drawn plans required of at least the side view
-Math to determine the length of throwing arm, sling/pouch length
-release pin angle and length
-math to determine approximately (or accurately) how far it will throw your objects. You must have this before you are allowed to throw anything!
-Need a triggering mechanism or safety hook!
-Axle must be 12"/30cm from the ground. No more no less!
-"footprint" of trebuchet can be a maximum of 24"x18"
-Everyone will have the same size counterweight (or pretty close in size)
-pouch/sling MUST be able to hold the golf ball and shoot it safely
-Trebuchet to castle distance will be 20 feet minimum but you can design it to shoot farther
Materials given
-10" of 3/8 steel rod for axle (which must be 12"/30cm from the ground
-3/4" square pine strips for frame
-runway material
-cement and wire to create counterweight
-fasteners (eye hooks, etc)
-paint to make it look fabulous
-string (you may bring in your own materials if you don't like ours) for the sling
Materials not given
Material for a pouch
Extra golf balls (you will get one and only one!)
How you are being Marked
-Marking will be based on research, design, build quality, and accuracy of your trebuchet. Please refer to the detailed marking rubric handout in class
Numbers and important info for weights!
Average cylinder weights we make are between 1.5 and 1.6 lbs (680grams - 725grams)
You can make your own as long as it will still fit on your trebuchet without hitting the ground/runway or breaking your frame after repeated uses.
Weight of wood
-We are using 3/4 x 3/4 pine to create our frame.
-a 12" (30cm) long piece of 3/4" x 3/4" is 0.1 lbs (43.4 grams)
-You may want to consider this when doing your throwing arm calculations for ratio and counterweight
You can make your own as long as it will still fit on your trebuchet without hitting the ground/runway or breaking your frame after repeated uses.
Weight of wood
-We are using 3/4 x 3/4 pine to create our frame.
-a 12" (30cm) long piece of 3/4" x 3/4" is 0.1 lbs (43.4 grams)
-You may want to consider this when doing your throwing arm calculations for ratio and counterweight
