K'NEX Rail Car and Track




About: Just your average K'Nexer/Programer/Nintendo DS fanatic. Any questions you would like to ask about any of the above? Send me a PM, I don't bite(much) ;-) If anyone wants to WIFI battle in pokemon, send me a...

Another cool and somewhat pointless K'NEX item made by me. this one has a car that gets pulled up and down a track by a chain that circles the track.

it's a pretty simple design, and easy to make (though if you make the track long like mine it can use up a good amount of pieces).

mine is 4 FT. 3 in., but it could be made lots longer.

it is made up of a two long lines of yellow connectors connected with green rods. it has supports every 4 yellow connectors. and front of it has two sets of gears(one hooked up to a motor) that the chain is looped around to send it in the other direction. the back is a almost exact copy of the front. the gears are in the same place, just there is no motor.

well, i hope you like it!

a very similar one is posted here:


Step 1: Car

that care is really nothing new or great. it's just a simple car with no treds on the wheels. the wheels fit perfectly on the track, the "curve" on the wheel rims make it so the car can not slide off of the track.

the top has a rod and connector that hooks up to the chain. it is made so it can turn and move in all directions so it can move when it reaches the turns on the ends of the tracks.

i used a black gray rod in this because it would not work well with a bent rod. black rods are more straight then regular grey rods because they are more resistant to bending.

the pictures are pretty self explanitory.

Step 2: Front Track and Chain Guide

well, the most complicated part is adding the motor. this part is pretty basic.

the chain goes around the read gears.

the random connectors on the red rod are just "filler connectors" as in there just there to take the place of spacers and make sure the rod does not slip out.

Step 3: Back Track and Chain Guide.

basically the same at the front, just with no motor.

Step 4: Track Pieces

make as many as you want. i used 6 but you can use as many as you want.

Step 5: Chain and Finishing Up

the chain is 116 links long for my version, but this will change depending on how long your track is.

now, putting on the chain and connecting the track is all self explanitory so i won't go into that.

to add the car just put it on the track and connect the red connector to the chain.

now turn on the motor and watch the car go back and forth. :-)



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    46 Discussions


    7 years ago on Introduction

    "i used a black gray rod in this because it would not work well with a bent rod. black rods are more straight then regular grey rods because they are more resistant to bending."

    just some info the reason they are stronger is because they are made of carbon rather than plastic


    Reply 10 years ago on Introduction

    well, i must admit that they are very similar, but upon closer inspection you can see that there are many differences. now, the front and back are very close(i can't tell for sure, since he only has one view of the back and two views of the front.) there is also no supports under the track, and it bends down. though they have the same design, they are different, just the mech is the same.


    Reply 10 years ago on Introduction

    The cars are exactly the same apart from the arm that connects to the chain.
    His does have supports, although it does bend because the supports in the middle are shorter than the ones at the edges.
    The front is exactly the same ('cept for the part under the gears where you have your grey rods inline and he doesn't).
    Your back is a little bit different because you modified it to use a different motor.

    Even with the slight differences you claim to have, this would still only counts as a slight modification and a reference to the original design should still be made.
    I have a knex computer on KI that I built after I was inspired by one I found on the internet. After I made one using a similar mech, and I had severely reduced the size by completely redesigning it (one can no longer recognize it as a modification of the original) I still gave credit to the original. You only slightly modified it (it is still recognizable) and you didn't even give Scott a single link.

    Negative twelve internets to you!


    Reply 10 years ago on Introduction

    i told you, i never saw that before. all i did was make the car as simple as i could(which i can see he also did). the original car i was going to post it with was different. i just thought this up, and some how he had the same idea. but i will post a link just to stop you from complaining.


    Reply 10 years ago on Introduction

    look, i did not plagiarize this. i thought it up my self. if you don't believe me fine, but i did think this up.


    Reply 10 years ago on Introduction

    It's the same exact thing as Scott's design. You've now lost the little respect I had for you.


    Reply 10 years ago on Introduction

    it is not the same thing and i thought it up. i know i'm right, and i don't need to explain it to you. and really, by the way you act and all, i don't care if you have respect for me or not.


    9 years ago on Introduction

    I should modify this to work as a ball tower lift as it would work brilliantly


    10 years ago on Introduction

    i'm making a special one with my crossbow pistol thing as a weapon on top, combined with an auto-firing system that i made for it:) the gun, with one rubberband, put a half centimeter deep hole in my concrete wall!

    4 replies

    Reply 9 years ago on Introduction

    the reasons are: you could kill someone with that thing i took it apart a while ago i cant attach my camera to my computer