Introduction: 4 Wheel Steering - Knex Car

Picture of 4 Wheel Steering - Knex Car

This is Officaly my first Instructable so please if you have any advice on how to make my projects better or if I haven't explained something well enough please feel free to criticise or ask.

I was going thruogh the site and I saw all the different things that users have made out of knex. Guns, Cannons, grenades, stands, ext. One area that I thought was laking was the knex cars, the ones that had motors couldn't steer and the ones that could steer didn't have motors.

I hope that this Instructable will help bridge that gap... Then again it would be cool if sombody could mount a gun on this thing... :)

Step 1: Drive Wheel

Picture of Drive Wheel

Yes you read that correctly. This car has four wheels that steer the thing and one that actually moves the thing...

I did spend a good amount of time on this and if that little thing bugs you then either change it on yours or just stop reading.

Step 2: Body

Picture of Body

or as I call it the waffle because over the build period I kept on making this section thinner and thinner...

Step 3: Steering Wheels and Axels

Picture of Steering Wheels and Axels

This is where the wheel that make the car turn are made. Just to be clear, you do need two of these...

Step 4: Mounting the Drive Wheel and Motor

Picture of Mounting the Drive Wheel and Motor

Finally the last thing to do is to add the drive system. I did work on this for a wile and I found that having more than one drive wheel creates excessive amounts of friction because having more that one or having the one not be in the center messes up the natural arch created when the wheels move to turn the car. I hope that explains it...

Step 5: Have Fun!

Go on, drive the thing around for a bit, add a gun to the top of the thing so you can drive it around a corner and shoot some thing the drive back to base, or just mod the heck out of it, the point of this site is to share ideas. So if this gives you a great idea for a butler-bot or a tank, go for it, just remember to mention your inspiration.


daredevil499 (author)2011-12-27

nice definitely 5*'s

SonicX 22 (author)2010-04-28

 this is very cool!!!!!, im gonna make it then mod it to be a robot


pls (author)2008-12-03

A video would be nice! Overall i reallllly like the idea, good job!

knexfreak95 (author)pls2008-12-04

its good but some suspension would be great

pls (author)knexfreak952008-12-04


Skreetsha (author)2008-11-05

Could you explain me how this works? I might be interested in building this one :)

robocrazy155 (author)Skreetsha2008-11-28

The gear system turns the two axles in opposite directions, that makes the wheels into an arch shape, then the whole thing moves on that arch. The picks in step 3 show it pretty well.

Skreetsha (author)robocrazy1552008-11-28

Ok, thanks :-)

I_am_Canadian (author)2008-08-14

Just stick my cannon on top.... Thats pretty cool! A video wouold be groovy.

you'd need to supersize the car, or use a small fleet to move that thing. or, you can build a special car with a gear system that can pull a gear from itself to stop the thing, or to change the direction.

Or just make it tow my mini. It has wheels :-)

but the full size thing on controlled wheels would not only be convienient, but also terrifying. which is awesome.

Yeah, make it remote controlled shooting too :-D

builder968 (author)I_am_Canadian2008-10-14


mrbox (author)I_am_Canadian2008-08-26

ROFL LOL LMAO !!!! "Just stick my cannon on top" ahahahaah! Hmm you could just stick Wicky's crossbow on a bigger version of this maybe even two heehe and maybe add one of I_am_Canadian's cannons ;D!

I_am_Canadian (author)mrbox2008-08-27

And a couple of cyclones on top, just for effect :-)

mrbox (author)I_am_Canadian2008-08-29

Maybe a couple killerk's to start it off... and maybe a rocket launcher ... and a couple of laser cannons.... that new ninja baby weapon! And maybe some garden gnomes... ;D! and to top it off with stealth feature... a box!

I actually took the thing apart... needed the snap connecters for my quad bow and I lack any video software at all...

Aw... You can usually take videos with cameras nowadays.

I just figured out that I can upload vids right from my camera to youtube! I'll try to have the vid up soon.


vid added!

darth_tater 2k8 (author)2008-08-19

This instructable is awesome! However you can improve the shape because it looks more like a cube than an actual car. I give this a 4*.

redrum0777 (author)2008-08-18

nice, knex cars. besides knex guns i also make cars. i have a really good model of a 57 chevy. i also make working lowriders and dune buggies. i dont have any mottors though :(

Hellchild (author)2008-08-13

I call it... Cube - Mobile!!

robocrazy155 (author)Hellchild2008-08-14


Hellchild (author)robocrazy1552008-08-14


Oompa-Loompa (author)2008-08-13

It doesn't really look like anything, but it does have steering AND a motor. 4*

I really was going for function over form...

I'm a design person myself, so this is cool to me.

brammeke11 (author)2008-08-14

i build something like this on tracks. i post a picture later. i give this a 4

robocrazy155 (author)brammeke112008-08-14


shadowninja31 (author)2008-08-14

nice 4*

The Jamalam (author)2008-08-14


About This Instructable




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