Instructables
Picture of K'nex Balisong/Butterfly Knife
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i know that the handles are not very stable, the smoothness of opening is not very good, and its very large. aside from that, this butterfly knife actually has a recognizable blade and handles that cover the blade (somewhat) when closed. plus, it even locks open.
and sorry for any blurriness.
 
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Step 1: Blade

Picture of Blade
the broken 90* connector is not a design requirement, it was simply the piece i had available when i built this. a 45* could also be used in its place.

Step 2: Handle 1

Picture of Handle 1
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once again sorry for the blurriness
the two pin clips are used to prevent overturning when opening
the piece between the two 90*'s is the female connector for a ball joint

Step 3: Handle 2

Picture of Handle 2
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Step 4: Connecting

Picture of Connecting
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woohoo!! more blurriness!
connect the handles to the blade.
be careful to note the direction of the pin clips on handle 1.
done  =:^b
randoman2214 months ago

The degrees symbol isn't right. If you have used the Alt key, then do this: Alt+0 . You will come up with this: º . Hope this is some advice. =:^D

con man3 years ago
cool
4/5
halo993 years ago
Can this do tricks like a real butterfly knife, or is it just switch blade. Because im looking for a knex ballisong to practice with so i wont cut my self with the real thing
The Sensei (author)  halo993 years ago
this one is kinda flimsy for trying tricks but i do have a reverse ballisong tht would be ok for tricks, also you can get practice butterfly knives or for a cheaper alternative put a strip of electrical tape up the blade to cover the edge. hope this helps =:^b
http://www.instructables.com/id/Reverse-Balisong-Knex-Knife/
wow nice this is the only other butterfly knife (other one being mine) that has a blade that actually looks like one - pretty cool
The Sensei (author)  SomeAsianKid3 years ago
thanks!! if you like this one you should check out my Reverse Balisong K'nex Knife.
http://www.instructables.com/id/Reverse-Balisong-Knex-Knife/
k lemme check it out :D
~KGB~3 years ago
nice