Introduction: K'nex E.U. Tank
This is the_burrito_master's k'nex tank, based on the E.U. tank in Battlefield 2142. He built it originally, and I simply copied it from pictures and then made an instructable using Google Sketchup. Imperar created the individual k'nex pieces in sketchup. I simply put them together. You can find the 3d model here:
http://sketchup.google.com/3dwarehouse/details?mid=3d44ba4e984ee8bf7036b270f2e25c91
and you can visit the_burrito_master for more k'nex stuff here:
https://www.instructables.com/member/the_burrito_master/
and you can visit Imperar and his k'nex supercar made with sketchup here:
https://www.instructables.com/member/Imperar/
The tank is propelled by a motor, and is durable enough to drive off the 2 foot table it's pictured on without breaking. The chain does not jam into the gears, mainly because of a few green connectors guiding it at the bottom and the gears' elevation from the ground. The turret can be made to turn with a motor, but I didn't happen to have an extra motor, so you'll need to figure that out on your own, as well as adding a motor if you don't have the same one I do.
If any part of the instructable is unclear, let me know and I'll add some extra views of the section. Or, if you would prefer it, download Sketchup and the tank's file and look at it from any perspective your heart desires.
Step 1: Step 1
1. Overview
2. Build
3. Build
4. Build
5. Align the sections from 2. and 3. like so.
6. Attach with the sections from 4.
Step 2: Step 2
1. Overview
2.-6. Build.
7. Attach to Step 1.
8. Attach to Step 1.
9. Attach these pieces. Be sure it's on the correct side.
10. Attach this piece.
11. Attach the axle on the opposite side. You will need to reconnect a few pieces.
12. Attach the blue rod to the white connector and add a red rod to the yellow/green/white connectors.
Step 3: Step 3
This step will be short, and shortly explained, so you can enjoy putting the top half of the tank on at once. The large piece you'll be making is symmetrical. 2. and 3. are the opposite sides of the same piece.
1. Overview
2.-3. Build
4. Orient and attach.
Step 4: Step 4
Now it's time to build the last piece, the turret, which took me some time to figure out. I made a few minor changes.
1. Overview
2. Build.
3. Build. This section is symmetrical.
4. Add to the previous section.
5. A few more pieces, and you're done.
6. Connect the turret to the rest of the tank.
7. Add four red gears.
8. Add four more red gears. Look at the pictures in the intro if you need to.
Add the chain by making a long line of links and running the motor in the proper direction to drag it along (or turn the axle if you haven't attached a motor yet). I didn't count how many links there were on each track, but the key is making it small enough so that it doesn't fall off easily, but large enough so that it doesn't heavily restrict the shape of the track. There should be some slack if you lift the tank.
60 Comments
Question 3 years ago
Any way it would work with only three pairs of gears?
8 years ago on Introduction
where did you get the knex prints .
10 years ago on Introduction
i built this it great 4-5* well done mate
10 years ago on Introduction
nice! your design?
11 years ago on Introduction
Here it is.
11 years ago on Introduction
If i post my 6 wheel drive tank, could you build a turret for it please.
11 years ago on Introduction
does the chain work for you?
Reply 11 years ago on Introduction
It works for me!!!
You just have to think about it.
It took me 6hours to complete
11 years ago on Introduction
does the chain part thing spin/work for you? and do you have any ideas? PLEASE LET ME KNOW!!!!!!!!!!! :)
12 years ago on Introduction
um could you please post a pic of you lifting it
12 years ago on Introduction
awsome also it looks slightly like a bmp1
13 years ago on Introduction
Imperar needs more credit for his original sketchup stuff. Take a look here:
https://www.instructables.com/id/Knex-Supercar-Instructions/
13 years ago on Introduction
WOAAHHH!!! IM NOT THE ONLY ONE!!!!! I USE SKETCHUP INSTEAD OF MLCAD TOOO!!
13 years ago on Step 1
did you make this on some sorta online knex builder thing?!?! cuz if you did tell me i wanna know it!!!
Reply 13 years ago on Step 1
Google Sketchup. The Sketchup warehouse (online database of models) has individual pieces that were made by Imperar.
13 years ago on Introduction
This is the best tank on the site!
Reply 13 years ago on Introduction
hey lowney, What do you think of my new tank, check it out:
www.instructables.com/id/The-MAR-Tank/
Reply 13 years ago on Introduction
Good work!
Reply 13 years ago on Introduction
thanks, do you wanna rate?
13 years ago on Introduction
will a green motor work