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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. . 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.

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