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Launch It: The Paper Catapult.

Step 4The Frame.

The Frame.
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The frame that supports the arm has four beams - two vertical and two diagonal.

The Vertical Beams

Cut and crease - note that the flaps at one end of the beam do not all get creased.

Glue the long flap and fold the piece into a square-section beam. Make sure the three holes line up (you should have just glued one hole over another).

Pierce holes at the three dots, then glue the outside of three of the flaps at the end with the dots. Fold the three glued flaps on top of each other, then cover the third glued flap with the fourth, dry flap.

At the other (lower) end of the beam, glue one of the creased flaps, fold it down, and fold the opposite flap on top of it.

You should now have a beam with two flaps sticking out at one end.

Repeat with the other beam.

The Diagonal Beams

Cut and crease.

Glue the long(ish) flap, and fold the piece into a square-section beam. You should have six loose, unglued flaps.

Repeat with the other diagonal beam.
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10 comments
Jan 26, 2010. 12:23 PMQuenbo says:
On the computer made template the wide top and bottom flaps are joined with a solid line (telling me to cut it off) just thought i'd say :D so far so good for me thanks for the instructions
Jan 30, 2010. 6:34 AMQuenbo says:
i glued a paper box like this onto the side of my catapult for an ammo box. I'm planning on making more modifications to make my catapult more personal :)
Jan 26, 2010. 1:25 PMLithium Rain says:
You pirate software?

:(
Jul 20, 2010. 7:37 AMa_person says:
use inkscape it is basicly free coreldraw/adobe illustrator for free
Jul 20, 2010. 3:57 PMa_person says:
glad i could help a master instructables-er
Jul 21, 2010. 8:57 PMa_person says:
Ya really!
Jan 26, 2010. 7:14 PMLithium Rain says:
Ah, I see.



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Author:Kiteman(The Complete Kiteman Shop)
"Happiness is a shed full of power tools." If you need help around the site, or with a project, feel free to contact me.