This instructable is on how to make a knife which can fire its blade. Useful when you are down to a knife when your opponent still has a gun, you can lull them into a false sense of security muahahaha! It can also fire small pellets.
I am not going to say 'it is my first instructable so be nice' because i hate it when people say that, so feel free to say so if it is rubbish. However, i do not want people saying bad things about k'nex in general.
Step 1: Pieces Needed:
8 yellow 5-way connectors
4 red 3-way connectors
1 ball socket connector
1 light grey two-way connector
2 hand connectors
8 white rods
9 green rods
1 yellow rod
2 bendy orange/red rods the length of yellow rods
2 elastic bands
all knex colours are in the metallic colours.
pic 2: you will also need these three pieces.
Step 2: Make Frame
Make both of these identical pieces.
Step 3: Make Trigger, Ram, Ram Aligner and Side Support
pic 1: trigger
pic 2: ram
pic 3: ram aligner
pic 4: side support
Step 4: Make Blade and Pellet
pic 1: blade
pic 2: pellet
Step 5: Assemble the Knife
pic 1: take the frame pieces
pic 2: add the side support with a white rod
pic 3: add the other side of the frame
pic 4: insert a white rod through the hole indicated
pic 5: add frame aligner
pic 6: snap white rod on where indicated
pic 7: add trigger
pic 8: insert ram
Step 6: Adding Elastics
pic 1: where the ram elastic goes
pic 2: where the trigger elastic goes
Step 7: Loading and Firing
pic 1: the blade has to be this way up. push it in until the trigger makes a small clicking noise.
pic 2: the blade is now loaded
pic 3: the pellet must be this way up also
pic 4: the pellet is loaded
to fire press the trigger forwards
Step 8: Mods
to make it more powerful, you can lengthen the frame and lengthen and strengthen the ram.