Introduction: K'nex Giant Ferris Wheel

This is my first Instructable. It's for a 234 cm(7,68 ft, 92,1 in) tall K'nex Ferris Wheel.

I often had problems with K'nex ferris wheels, because it's hard to keep the towers strong, when they are only connected with one black rod.

This ferris wheel has an open hub, so there is room to connect both towers by a strong bridge.

Step 1: Building the Base

First you have to build the base which holds both support towers, the 12V engine, and the first reduction gears. It also forms the boarding platform. It looks really small for the size of the wheel, but it did a good job on mine. When you take it outside, it might be an idea to add further support. For indoors, this is good enough.

Step 2: Building Support Tower 1

Next is support tower 1 It's a fairly simple red rod tower. It also has the drive shaft attached to it, which drives the wheel.

Step 3: Support Tower 2

Support tower 2 is built up of yellow rods. On the bottom end there is a red rod block, which is attached to the base. It's important to make the connection between the red block and the yellow tower quite strong, if you don't, the tower might break there.

It's important to put a gray connector on one of the vertical rods on the top block. This will be connected to the bridge between the towers.

Step 4: Top of Tower 1

The top of tower 1 has the final drive on it, which makes the connection between the vertical drive shaft and the chain drive.
The bridge which runs through the hub, from tower 2 is also attached to this part.
It also supports one side of the drive/support shafts.

Step 5: Top of Tower 2

The top of tower 2 is quite simple, it doesn't have any gears in it. It supports the drive/support shafts, and it has the bridge on it.

Step 6: Drive/support Shafts

These shafts hold the weight of the wheel itself, and also drive the wheel via 2 chain drives. It's important to fill the rods completely with rings, wheels and connectors. If not, there may be too much room at the bearings, so the shafts may fall out.

For the main shaft (right one, from top to bottom) the following parts go on the rod.

1 grey connector
1 ring
1 big wheel, with rubber bands around it, these add grip.
2 beige wheel holders
1 red wheel
2 beige wheel holders
1 red wheel
14 rings
1 beige wheel holder
1 big wheel
2 beige wheel holders
2 red wheels
1 beige wheel holder

The second shaft is the same, exept that it hasn't got the second set of red wheels. Fill up this space with rings and beige wheel holders.

Step 7: Tower Assembly

Quite simple really, build all the parts together, to form the towers, whith the drive mechanism.

Step 8: Wheel Construction

The wheel is built up out of 31 elements. The elements themselves have 3 parts, the drum part, the wheel part, and the car part.

Building the outer ring is a matter of fine tuning. I found the easiest way to do this was to attach the wheel to the tower, and testing a bit with blue and white rods.

The cars I've built are very simple, but it was all the K'nex I still had left, you can build whatever car you like.

Step 9: Final Assembly

By building the wheel in two halves, they can be mounted around the bridge/drive/support shafts. Each halve will be HUGE by now. I've tied a rope around my ceiling lamp to keep the top halve up, while connecting the bottom halve. Another possibility is to keep the top halve balanced on top of the two drive/support shafts.

I found it easy to keep the car parts(everything outside the outer ring) of until the wheel was mounted on the tower.

Comments

author
Rudy3983 (author)2014-09-17

it is really good! where do you get all the pieces ?!?! : )

author
I_am_Canadian (author)2008-06-12

Cool! I can almost hear the carnival music now......

author

lol. in one ferris wheel set there is a lil' orange cylinder that plays carnival music. i have one. staring at it as i type.

author
=!snap!= (author)RMConstruction2009-08-14

I have one from a rolercoster thati think would qwork to, its motion activated to it makes the sounds of it turning and people screanming and chearing :)

author
tjdtjd1 (author)=!snap!=2009-10-23

i have one too. i got it from a fair ground set

author
jacksonhpeters (author)tjdtjd12011-10-31

me too, it is so annoying :D
rig it up to someones door for some laughs

author
tinker234 (author)2011-05-26

hey cool could i do it in wood

author
rybubbles (author)2009-08-30

do you need them???

author
cqdmgy (author)2009-08-18

I got those from the ball machine crane set.

author
Green482 (author)2009-08-18

could you please tell me what those blue and yellow platform things that you used are called? and maybe what set i can get them in?

author
knexsuperbuilderfreak (author)2009-06-22

wow a great new mech

author
floris2burn (author)2009-06-15

When I build ferris wheels I always get stuck at the part where a rod has to serve as axis and carry the whole weight of the wheel. You found a nice solution to that! grats.

author
Jesus. (author)2009-06-07

hey does it use more then 2 black rods??

author
cqdmgy (author)Jesus.2009-06-07

Yes, it already needs two for the wheel axles. Perhaps they are replacable by grey ones, but I didn't check that.

author
TwistedParadox (author)2009-05-27

How tall does this stand when completed?

author
cqdmgy (author)TwistedParadox2009-05-27

234 cm

author
ferdi09 (author)2009-03-07

wauw die heb ik ook een keer gebouwd maar dan anders maar het ziet er cool uit maar die ga ik niet bouwen dus later!

author
cqdmgy (author)ferdi092009-03-08

Lol, ik zit nou in een verhuizing, heb nog wel wat leuke K'nex plannetjes op stapel staan!

author
builder968 (author)2008-11-13

i wish i had enough pieces to build this...

author
J-Five (author)2008-11-09

Wow, I wonder how many pieces it takes.

author
Skreetsha (author)2008-10-19

Only word to decribe: Epic.... *Watches this thing like it's made in another world*

author
The KNex Weasel (author)2008-09-20

Can you by any chance please post a list of what pieces you need to make this? I'm sorry, but I'm too lazy to try and inventory them myself. Great Ferris wheel, though.

author
cqdmgy (author)The KNex Weasel2008-09-21

Well, as I've taken the whole thing apart again, I don't have a full list. I think you can build the towers the way you like, as long as they are strong enough. The wheel can be extended as you like, to make it as big as you like. Remember though, you need 31 pieces of everything, because the wheel has 31 sections.

author
Darth Trainman (author)2008-06-11

You realize what this means, right? I have to build a bigger wheel. But this is bad-ass...

author

put gun barrels on it. THE UBER VORTEX!!!!!!!!!

author
cqdmgy (author)pfdanielson2008-08-03

It would I guess. I've just never quite figured out how these K'nex gun barrels really work. It might also be a bit unpractical to load and aim. I might try it someday perhaps:P

author
The Jamalam (author)cqdmgy2008-08-23

the ones you would need use elastic bands to push a firing pin (long rod) into a round (another rod) and cause it to fly out of the barrel

author
jedff (author)2008-08-03

how long did it take to make

author
cqdmgy (author)jedff2008-08-03

About two days I think.

author
jedff (author)cqdmgy2008-08-03

that would take me a week probaly

author
sonic55575 (author)2008-07-05

haha, when i saw this, i thought of the carnival music on the spongebob movie when they blew bubbles! lol!

author
Mad Cat (author)2008-06-08

I built it and it is fricken HUGE! Although i did have a funny experience with it. My cat ripped the carpet in my room so i was chasing him. He hid behind the ferris wheel and i thre a shoe at him. I missed and the shoe destroyed one of the support towers. The whole thing toppled over, and what do i get? CARNAGE! And my cat got stuck under it and he couldn't get out, lol.

author
I_am_Canadian (author)Mad Cat2008-06-12

That must have been one mad cat.

author
Mad Cat (author)I_am_Canadian2008-06-12

Yeah he's insane. He jumped 3 stories to chase a bird at my grandmother's.

author
I_am_Canadian (author)Mad Cat2008-06-12

Is that him you have as your atavar?

author
Mad Cat (author)I_am_Canadian2008-06-13

Nah, that's some random cat on google images. I'll change the picture to my cat later.

author
I_am_Canadian (author)Mad Cat2008-06-13

Ok.

author
GorillazMiko (author)2008-06-04

Outstanding job! Incredibly nicely done, extremely well made and everything, it's just so... so... awesome.. :-O I really hope to see some more, and maybe a video of it in action? Great job once again! +5/5 stars.

author
j-chode! (author)2008-06-04

the is certainly the most originalist thing i have seen on this entire site.
i love it

author
philipster (author)2008-06-04

love it and i could see my dog running into it and destroying it put lights on the tips and do it at night so it would look even cooler

author
mrbox (author)2008-06-03

Now thats an epic build!

author
Doctor Who (author)2008-06-03

Built but my motor sucks so I made a hand crank. (don't know how to connect my new camera to computer)

author
the_burrito_master (author)2008-06-03

nice but for the noobs wouldn't be able to go off this to well.

author
Kiteman (author)2008-06-03

Omigosh! That's a class piece of kit. It would be nice to see a video of it in action, though?

author
cqdmgy (author)Kiteman2008-06-03

Sorry, I don't have a vid. I've first built the whole thing, and as I had to break it down anyway, I thought I'd make an instructable of it!

author
jollex (author)2008-06-03

That... is... amazing! I really like how you have the ferris wheel going around on those wheels instead of having a motor just spin the wheel from the center.

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