Continuously Variable Transmission Made Out Of LEGO

October 5, 2012


This is a continuously variable transmission (CVT) made entirely out of LEGO pieces by Youtuber nico71240. Granted I have no clue what a continuously variable transmission is because I'm a stupid idiot, but I can tell it's impressive to build one out of LEGO.

This CVT enables a variation of the speed (and the torque) from 40rpm to 200 (1/5, 1,1) with constant speed for the motor (200rpm). This device is on the way to be included in a lego car. The two mechanical tachometers show respectively the speed of the motor and the speed of the output.

Cars, man, I don't GET them. You can yell at them all you want but that doesn't make them go. You have to like, feed them gas and stuff and sometimes they'll STILL just sit in your driveway and leak oil. *looking out window* DON'T YOU?! As soon as you're running again we're driving off a cliff.

Hit the jump for a video of the thing in action set to a song I could have done without.

Thanks to Alex, who told me to pour sugar in my gas tank because cars like sweets.

  • ZomBBombeR

    Pretty neat making a CVT out of legos and all but the song was hard to listen to thankfully there was no other volume so you really get more out of the video muteing it.

  • eddd222

    I wouldn't call it a variable transmission, he's just driving a differential with a motor and he's braking one shaft with his hand. the more he brakes this shaft, the faster the other one is spinning. the trick with every CVT (v belts, push belts or balls on tapered pullies) is that they have very limited wear when they stay at a certain gear ratio. and changing gear ratio will increse wear slightly. this system you have to constantly brake a rotating shaft. this will require some serious brakepads if you wanted to put this in your car.

  • I'll take 7 full constructed metal engines like this one thank you

  • Sergio Ferreira

    Not that remarkable when you take into account that the CVT was originally invented and built by Leonardo Da Vinci in 1490. His variable pulley system, identical to today's CVTs, allowed one man to pull many different weights with the same amount of force.

    Imagine what he could have done with funding and without the church holding him back!

  • Yes but did he build it out of Lego?

  • JJtoob

    Maybe if he had invented Lego, he would have gotten the funding he needed, and the materials to make his inventions all at the same time!

  • jimmy

    But we all know that Newton invented Lego.

  • Now make a Wankel engine.

  • BillGatesIsYourDaddy
  • Yeah! Wankel engine!

  • BillGatesIsYourDaddy

    nico71240 is obviously a sorcerer

  • Guest should be feared or honored of this craft? ( o__o)

  • rikster81

    cvt trannies suck and are expensive to maintain thats why auto makers are not using them anymore. i work at dealership i know this shit

  • Patrick

    My hybrid honda jazz has a CVT gear box, if it breaks down I wonder if I can build a replacment with Lego.

  • aaron


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