I am not liable for anything stupid you may do with this trebuchet....If you injure or kill anybody with it, don't come crying to me. Just be smart
PS: this is my first instructable, so tell me if it is good, and what improvements i could make to it.
PSS: sorry about the low quality pictures, But you should still be able to get information from them.
UPDATE: i just built a duplicate at my friends house using this instructable...I think i miscounted a few pieces, but if you have your knex bucket near you, this shouldn't be a problem. Also, you may need to tinker with the string length, counterweight weight, and other small stuff...It still works fine though!
Step 1: Materials List
(all measurements may not be accurate)
Blue x 50
Yellow x 24
Orange/red x 6
Grey x 1
Yellow x 9
White x 12
Light Grey x 2
Dark Grey x 2
Red x 18
Blue x !0
Purple x 10
PS: Red can be used in place of orange, and the other way around
Some sort of tape ( I used scotch tape..the clear stuff...because i was sort of in a pinch...works fine!)
two D cell batteries
a bit of spare cloth
Step 2: Connect
Step 3: Construct the Base
Step 4: Make the Side Supports
Step 5: Consruct the Arm
Step 6: Make the Counterweight
NOTE: SOME D-CELL BATTERIES ARE DIFFERENT WEIGHTS, i used energizer, which are pretty darn heavy!
Step 7: Constucting the Axle
Step 8: Cut Out the Strings
about 7 inches long
(this will be called your first string)
2nd and 3rd string:
about 10 inches long
(these strings should be same length, and will be called your 2nd and 3rd strings)
As far away as you want to be from the trebuchet when firing!
(this string should be pretty long, and will be called you 4th string)
Step 9: Make the Sling
Cut out a piece of cloth in an oval shape, that is about 2.5 inches wide and 5.5 inches long
once you do that, make two holes, one in each end.
Tie your 2nd and 3rd cut strings to each end.
Then tie a orange connector to the end of one of the strings.
Whichever string you didn't tie the orange connector onto, put a loop in the end...(one that doesn't slip and is about as big around as a pencil)
Step 10: Put Some Stuff Together
Step 11: Stick Some Stuff to the Arm!
First, take the first string you cut, and tie that to the white connector on the short side of the arm.
Tie a Dark Grey connector to the end of the string you just tied to the arm.
Connect that connector to the blue rod sticking out of the top of the counterweight.
Next, connect the orange connector on one end of the sling to the long side of the arm.
( make sure all your knots are tight, so things don't fall off! )
Step 12: Put the Arm on the Trebuchet
Put the axle through the white connector close to the center of the arm. Put your light Grey pieces on either side of the white connector to make sure it doesn't wobble. MAKE SURE IT IS CENTERED.
When you have put the arm on the trebuchet, the counter weight should swing down to the base, and not touch the bottom...If it does, adjust your knots.
Step 13: Making the Firing Pin
Put Dark gray connectors on both sides of a red or orange piece.
Then, tie a string to one of the Dark gray connectors.
put the firing pin though the top yellow connector on one of the side supports of the trebuchet..Make sure the firing pin is on the side that will hold the long arm when it comes down( the side that the top of the arm is leaning towards in most cases)
Step 14: Loading and Firing (the Really Fun Part)
This may be a little tricky, but i will do my best to explain!
1. Pull the arm down to the firing pin
2. put the firing pin over the arm to keep it from firing while you are loading it
3. pull the sling back a bit, so the loop is by the orange connector
4. put the loop in the end of the orange connector
6.pull the pouch taught, and make sure there are no loops...the loop side should be on the bottom, and the side tied to the arm should be on the top.
7. Put your projectile in the pouch
7.5. Make sure there are no animals, humans, or breakable objects in the way
8. Back up, take hold of the firing pin sting, pull, AND FIRE!!!
9. watch your missile take a satisfying arc across the sky.
Step 15: Other Ammo
i sometimes use
1. marbles (a nice heavy projectile)
2. Lego heads (You can launch multiple ones for a LOTR battle of Minas Tirith effect)
3. Airsoft pellets (Great spread shot!)
4. Anything that is a reasonable weight and fits in the pouch!