MOCpages : Share your LEGO® creations
LEGO models my own creation MOCpages toys shop Fastest LEGO DragsterVehicles
Welcome to the world's greatest LEGO fan community!
Explore cool creations, share your own, and have lots of fun together.  ~  It's all free!
Fastest LEGO Dragster
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 NXT-G 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 alkaline-batteries 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!
  March 9, 2011
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?
 
By techn0m0ves .
Add to my favorite builders

8
people like this. See who.

7,011 visitors
8 comments
Added August 23, 2008
 


LEGO models my own creation MOCpages toys shop Fastest LEGO DragsterVehicles


You Your home page | LEGO creations | Favorite builders
Activity Activity | Comments | Creations
Explore Explore | Recent | Groups
MOCpages is an unofficial, fan-created website. LEGO® and the brick configuration are property of The LEGO Group, which does not sponsor, own, or endorse this site.
©2002-2014 Sean Kenney Design Inc | Privacy policy | Terms of use