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Finally it's done! Metropolis, my second ball machine. It has a total of 12 different paths, 16 if you count all small sidepaths as well. And it consists of many new elements I designed myself.

I have posted the instructions of some elements here:
Link to Instructions


Building time:            Oct '09 - Aug '10

Dimensions:              Width   1.40 m
                                      Depth  1.15 m
                                      Height 2.40 m

Weight:                        48 kg

Number of pieces:    29.873


Enjoy the video and thanks for looking.

Kairah
 
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Lolman40004 months ago

Wow so cool! I think the most amazing part is that you did it with just 3 motors!

tylerman1233 years ago
alright now give us step by step instrutions :)

lol

Quidditch336 months ago
Instructions? Lol jk
www1391 year ago

what k'nex tubing do you think is best for k'nex ball machines?

www1391 year ago

I've watched the video like at least 100 times and I still don't know how you got that zig-zag element to work (I've made some myself!!!)

AMAZING!!!
i agree
Kairah (author)  dr. richtofen3 years ago
Thanks!
No Problem!
this is epic beyond beleif. congratulations!
geeksquad2 years ago
can you tell me were i can buy this, i would really appreciate it. i love knex and i want to build this thing so if you could please tell me were i can buy it and how much it was thank you.
In case you're still wondering, there are no instructions for something like this. He designed and built it over a really long time, and likely bought quite a few extra pieces along the way. I'm working on something similar right now, and it's a lot of patience and taking things apart when they don't work exactly how you want them to
hunter9992 years ago
Truly awesome, This is by far the most colossal K'nex ball machine on instructables and was more than worthy than my time, it is far beyond optimum! You earnt a sub! Keep it up mate ( yes this comment is late...)
puppetjax2 years ago
Omg that is the most gigantic knex creation i have ever seen!
vishalapr2 years ago
How much power does the whole thing draw? This is the best Knex machine I have ever seen! Making something like this for me is impossible as I would quit in less than a week or 2 XD
ryry20112 years ago
if you dont mind me asking how much money do you think you have in knex?
CaseBoy2 years ago
I don't really care for k'nex, but that was the most ingenious thing I have ever seen. props.
crackman3 years ago
Great ball machine! This is probably the best ball machine on instructables. Nice job.
+1 on the Philip Glass music!
How did you make that!!!!!!!!
Gnmar27233 years ago
hey kairah are you making a new machine or or you just going to leave metropolis up forever? because i think everyone in the instructables knex ball machine community thinks your a god or something and we really want to see another machine if your making one or know if your never going to make one again. PLEASE RESPOND! YOU ARE AMAZING!!!!!
dylan4343 years ago
awesome work!
hai
arjun13 years ago
WOOOOOOOW!!!!!!!!!!!!!!!!!!!!!!!
so cool!!!!!
Great music
awesome again. i was thinking that if you want a challenge tat you could try to rebuild one of these from this site or any others again you dont have to. K.I
http://www.automotto.com/entry/k-nex-assembles-rods-connectors-to-replicate-means-of-transportation/
knex-sculptures9_idz7t_3868.jpgknex-sculptures4_d7R6z_3868.jpgknex-sculptures5_VboBX_3868.jpg
Those are incredible! Did you make these?
no they were on a website
Oh.
Puddock3 years ago
Awesome!
Holy crap I thought that it took 2year or some thing like that5*
Elap3 years ago
Oh, wow! There are so many original ideas here.

Hearty congratulations on a wonderful achievement.
bbaron13 years ago
WOW! I don't have any words to express what I want to say. That is just amazing!
HOLY CRAP!!!!!!! I'VE SEEN SUM AMZAING STUFF BUT THIS BY FAR IS THE KOULEST THING I'VE EVER SEEN IN MY 13 YR OLD LIFE!!!!!!!!!! YOU R MY HERO!!!!!!!!!!!!!!!
lguillette3 years ago
Absolutely incredible. Beyond words.
skyrider943 years ago
who thinks this should be a knex set... it would cost 1000 pounds but who cares
TigerNod3 years ago
O_O

I am stunned. I absolutely am. What is there to say about this, other than that it is awesome beyond words?
If that number (piece count) is what I think it is... you have WAY too many Knex. But at least you can build with them. I mean it. That is awesome!
i luv it =)
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