Introduction: How to Build a K'nex Tank

Picture of How to Build a K'nex Tank

 Hi, this is my first instructable Hope it works for you =)

This is my K'nex tank. It has a gun that fires, it can drive both backwards and forwards, and it is sturdy.
(It fires air soft  BBs)

Pros: can drive, can fire, is sturdy, looks really good, and tracks don't come off very often

Cons: Turret doesn't rotate, and there is no mag :(  but you can add one...

Step 1: Begin the Body

Picture of Begin the Body

 Build these. These pieces I'll call #1 and #2

Step 2:

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 Now build these... These are pieces 3,4,5,and 6

Step 3:

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 Now these... these are pieces #7 and #8

Step 4:

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 Put pieces #7 and #8 together and put a motor in between...

Step 5:

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PART ONE:  OK, now add three grey rods and put a grey spacer on each rod (both sides)....

PART TWO: now put pieces 3 and 4 on (shown in image 2)

PART THREE: now add another grey spacer on each rod and then put on pieces 5 and 6 (image 3)

PART FOUR: now add these spacers onto each of these rods (image 4)

PART FIVE: now add pieces 7 and 8 (image 5)...

Step 6: Putting on the Tracks

Picture of Putting on the Tracks

 PART ONE: now put these on (image one)

PART TWO: put  a grey spacer on each rod THEn put on wheels then a blue spacer (image 2)

PART THREE: build these. These pieces are #9 and #10 (image 3)

PART FOUR: put pieces #9 and #10 on, one on each side (image 4)

PART FIVE: now put on the tracks! =)

Step 7: Building the Gun!

Picture of Building the Gun!

 PART ONE: build this. This is the firing pin (image 1)

PART TWO: build this. This is the gun mount (image 2)

PART THREE: build this . This is the trigger (image 3)

PART FOUR: now build this. This is the gun barrel (image 4)

PART FIVE: build this. (image 5) 

PART SIX: build these. there are ten (image 6)

Step 8: Building the Gun! Part II

Picture of Building the Gun! Part II

 PART ONE:  now put the gun mount on the circle piece like this... (image 1)

PART TWO: now take the trigger and attach it to the barrel like this... (image 2)

PART THREE: now take the barrel and attach it to the gun mount like this... (image 3)

PART FOUR: now take those ten pieces  that you made in step 7 and attach them to that circle piece that has the gun on it with blue rods... (image 4 and 5)

PART FIVE: see those two blue rods in image 6? attach them to those two black circle pieces in image 7...

PART SIX: the gun is on!!!!!!! (image 8)

Step 9: Elastics!!!!!!!

Picture of Elastics!!!!!!!

 OK, here is how to put the elastics on here is a picture of the back of the gun (image 1). Now put the firing pin you built in step 7 in the barrel in the back. Like this (image 2). Now put a strong elastic on like this (image 3). Now put another elastic through the hole and put on two blue rods like this     (image 4).
(The more elastics you put on, the more power so, add as many elastics as you like. Just don't over stress the gun.)
You are done this step!

Step 10: How to Fire

Picture of How to Fire

 To fire, you need to pull the firing pin back far enough to be able to push the trigger up, then load your air soft BB into the barrel from the front. Now push the trigger down!!!!!!!!

                                         YOU'RE DONE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

                                 <(o_o)>     :D      :p       :)   (x_x)        <- LOL


whispersync (author)2014-11-03

It needs armor baddddd

mdman10 (author)2012-02-17

i built a battleship out of micro knex and i think the gun thing on your tank would look good on my battle ship. the battleship is like 5 feet long and the tower is like 2 1/2 feet high. i can sit in it. i need a gun though so im using the one from the tank. oh nice tank too :-) the battleship is NOT on instructibles, but i might post it soon.

sharpbike123 (author)2011-08-23

Check out my 6 wheel drive mini tank.

knextank (author)2011-08-11

I just made a system that seems to work for this tank, there's just 1 problem : the motor has to be attached very low to the ground, so one wheel on each side hit the ground, otherwise the grip sucks and the tank won't drive

knextank (author)2011-08-11

can some1 help me making a tank with suspension that can turn left / right and forward / backward only using 1 motor ?!

mdman10 (author)2011-02-19

i made one here is a pic

andy11894 (author)mdman102011-05-05

mine would be more like this as i haven't got and mini knex sets

mdman10 (author)2011-02-18


jtpickett (author)2010-02-08

It looks so cool i hope the gun fires

slipdiddy101 (author)jtpickett2010-11-06

it does

jtpickett (author)2010-02-08

My tank didnt work.  it looked cool but i couldnt get it to work.  good luck

slippdiddy (author)2010-01-10

nice tank.... im saying this cuz i helped make it.... and i let u use MY track for it.... see ya bro

slippdiddy (author)slippdiddy2010-01-14

ok.... i did not help i just sat on his bed playing videogames.... but still...

DJ Radio (author)2009-12-17

Beef up the structure a little bit.

ZeroGravity9 (author)DJ Radio2010-01-11

see their you go agian DJ radio, making some1 feel bad becuz they didnt do something that impresses dude u need to relize what you are doing!

DJ Radio (author)ZeroGravity92010-01-11

I'm not blatantly dissing this creation, I am giving a suggestion on how to improve it.  Big difference there, Einstein.

ZeroGravity9 (author)DJ Radio2010-01-12

But is it your choice to change it/ modify it? or our choice the author of this instructable

slipdiddy101 (author)2009-12-18

 I probably will build a v2 with more armor, and a better turret, but I just finished a crossbow that took all my pieces. Its powerful, it can shoot right through cardboard!!!! :D

Mr. Muggle (author)2009-12-18

nice cannon, if you make a v2 add more armor

~KGB~ (author)2009-12-17

i like it!

About This Instructable




Bio: You can either find me at the hill snowboardin' wit my friends, hitin' jumps on mah bike, buildin' something, or doin' anything thatz fun or ... More »
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