This is the fastest LEGO vehicle ever built!! It is made with the 5292 RC Race Buggy and a couple of LEGO items.
About this creation
This dragster is inspired by NXTLiftboy's NXT DraXTer #1 en #2. I had as goal to break his fastest time of 2967 milliseconds over a track of 5 metres lenght. I went on building and after a time of trying many pieces I built this car.
The space between the car and the ground is very small so the car has as little as possible air resistance.
The Gear:
This car is especially made so that you can choose with which gear you would drive: the wheels direct on the drive axle or you can choose for an 3 to 1 gear. There is just one disadvantage: if you choose for the 3 to 1 gear you have to turn the whole dragster 180 degrees and place an other part to lower the frontwheels.
The Time Measuring:
I used a NXT to measure the time. I wrote a NXTG program that prints the time in milliseconds on the display. The time begins running when the frontwheels go through a light bundle and also stop when the frontwheels go through a light bundle 5 metres further on. The problem was then that you don't have wires of 5 metres long. Then I devised you can make it as follow:
(To look at this picture you has to click on it)
The large black rectangle is the source of light, I've used a laser. The red line is the laserray and the small black quadrangle is the lightsensor of the NXT. The two diagonal stripes are mirrors.
Some Useful Things:
The battery box can be take off to change batteries like you see in the picture.
The Time:
When I set up the whole time measuring installation it was time to let the dragster ride. The batteries weren't totally full so there wasn't the fastest time possible: 1728 milliseconds, but my goal was reached I broke the time of NXTLiftboy with nearly the half. And then I rode with some alkalinebatteries and the time was: 1673!! I've calculated the average speed and it was: 10,759 km/h. But that is the average, and later on I did some measurements to find the maximal speed and I made the time installation to one metre lenght and measured a time of 215 milliseconds with approximately 10 metres to come on it's highest speed. That comes to 16,744 km/h: 1:0.215=4,65 ==> 4,65 m/s *3,6=16,744 km/h
Later I've searched on the Internet to find the fastest ride and I found nothing. So my car is now the fastest.
Comments


I made it 

April 26, 2011 
Quoting Dima Rybakov
Pretty quick. So you're saying it takes .0215sec to go 1 meter at its highest speed? That comes out to about 2.7 km/h, how did you get to 16,000+ km/h?
The dragster takes 0,215 seconds for 1 meter. Some calculations give the average speed on that single meter: 16,744 km/h.
NOTE: The , in the metric system means the same as a . in the american system. So the speed is 16 and 744 of a thousandst km/h! 

The dragster is nice. I know how difficult it is to make it as light as possible, so it will drive as fast as possible.
I've made 2 racecars with the same rc buggy motor and my topspeed record is also 16+ km/h. Instead of one I used two engines and on the latest model I build a rc 4 speed gearbox and return to center steering unit. This makes the car great to drive and fast at the same time, but I'm sure your accelaration is better then mine ;) 


I like it 

January 23, 2010 
would powerfull pull back motors provide a faster speed??? 


I made it 

February 15, 2009 
Quoting NXT Liftboy
I made some additional calculations. It turns out that this is very close to the theoretical limits! I used measurements from philohome. He arrives at the max mechanical power that any LEGO motor can deliver. The buggy motor used here outperforms all others. Then i measured the total weight of the dragster with batteries. Then i derived formulae for the time for 5 meters with standing start, if all power would be put in accelerating the dragster, so ignoring any friction. It became clear that this is racing only a few tenths of seconds above that limit.
So it is a REAL challenge to come up with a faster LEGO car indeed :)
Wow, I have never seen it like that :) Thanks for your comment, techno 


I like it 

February 15, 2009 
I made some additional calculations. It turns out that this is very close to the theoretical limits! I used measurements from philohome. He arrives at the max mechanical power that any LEGO motor can deliver. The buggy motor used here outperforms all others. Then i measured the total weight of the dragster with batteries. Then i derived formulae for the time for 5 meters with standing start, if all power would be put in accelerating the dragster, so ignoring any friction. It became clear that this is racing only a few tenths of seconds above that limit.
So it is a REAL challenge to come up with a faster LEGO car indeed :) 


I like it 

December 8, 2008 
Just imagine: Your are driving on your bicycle to school. And suddenly your are passed by a Lego car! (:>) We are impressed and ..... we consider this as a challenge to beat it!
Signed Hupie and Egel. 


I like it 

October 28, 2008 
nah, my rx7 goes 400 times faster...jk 


I like it 

August 26, 2008 
Pretty quick. So you're saying it takes .0215sec to go 1 meter at its highest speed? That comes out to about 2.7 km/h, how did you get to 16,000+ km/h? 


More from techn0m0ves More across MOCpages


student teen kid toy play lego child video game hobby blocks construction toy legos fun games
