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This is a new K'nex Roller Coaster propulsion system that uses 2 wheels instead of using a chain. Very practicle. These steps will show you how to build the main part, then you add it to your roller coaster. It uses 2 motor. For me I have one that always run- on motors(left) and one that is remote (right) but you can put 2 run-on motor also.

Step 1: The Support Base

Make this! This is the base that support the tracks. You may not have to build that if you just want to add it to your roller coaster.

Step 2: The Tracks

This is how the tracks need to be made, but you can modify it to fit on your roller coaster.

Step 3: The Motor Assembly #1

This step is to make the frame of the two motor assembly. You need to make four of them.

Step 4: The Motor Assembly #2

Here you add the motors, wheels, rods and spacers to build the propulsion module. LOOK CAREFULLY

Step 5: Assembly #1

In this assembly, you have to connect the motors to the tracks.

Step 6: The Final Assembly

Now install the track on the base support, add elastics to pull the motors upwards, install the tubing on the tracks, and you're ready to go.

IMPORTANT
If the wheel don't grip the wagon adjust the elastics to be tighter.
Cool!
i didnt look carefully
Can I connect this coaster with other packs?
Duh, Thats what it's for.
nice other than the video not working. i might have to do something similar for the coaster im currently working on. but first i have to buy more tack so i can actually finish it. at the moment it's 2.20 meters tall (7 foot 2.5 inches).
Finally, an interesting k'nex instructable. There's a first time for everything. Good job.
Are you trying to confuse us or are you actually saying something nice?
No, I'm not trying to confuse you. It's genuinely refreshing to see a k'nex instructable that's not a crappy gun. I say plenty of nice things, just not usually on K'nex related...anything.
knex guns rock
.
ROFLCOPTER. T3H STEEV IZ BAK! What is that, an octopus?
Then you may like my new thing - Even if I built it about a year ago, it's cool, k'nex, and not a gun.
What you're saying is true. Always guns!!
RUN FOR THE HILLS HE"S BEING NICE
lol
thank u, thank u very much
these have been around for a long time. you can make this only use one motor by applying a chain to the gear.
this is cool, a chain works better though but this is more realistic<br/><br/>I'm working on a knex coaster blue streak for Cedar point<br/> [http://this is cool but a chain works better but this is more realistic more pictures]<br/>
Looks cool. Do you need multiple motors to get it up to 3 feet (as an example)? And where is the remote controlled motor from?
nice idea! i might add it to my new coaster in construction... see pic! it is going to be as tall as my ceiling (aprox. 10 feet tall). How do you like it so far?
wow.....smart idea never though of implementing it into knex. When in fact this is an actual method of propelling roller coasters. Believe it or not this method of propelling a roller coaster car to speed is called a "spinning tire launch" and is used in many famous roller coasters, the one that comes to mind is "the hulk" at universals islands of adventure. A park I don't particularly care for, lol.
Hmm... If you dress it up a bit, it would be even better. How fast does it go?
lokk at the video
It's very nice but a bit slow. Great idea, might make it when i fainally make my coaster.
well invented but a little fafy i pfrefer chain still good work! p.s first coment!

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