So, in order to prove that science is true and to show that those six steps Are really the best use of your time on the day of our big race. Here I decided to completely build a car from scratch in about 45 minutes and then take it at the Competition and see how it did so. The first thing I did would just make a single cut in this block of wood. So remember Aerodynamics are important, but there's no need to totally kill yourself on it. Just a simple reduced shape is good Okay, so the next step is polishing, the axle so here's a before and after Basically you just want to take your axle, put it in a drill, press or even a hand, drill and duct tape down the trigger, And then You just take different levels of sandpaper and just different water and put it on the nail Yeah you go all the way from you know, 600 mm Grit top online casinos usa.
The last step should be some sort of polishing compound. I put a link to another Youtube video that covers this in a lot more detail in the video description And then I went ahead and mark the 12 o'clock position on the nail head, and this is why So in doing research to talking with a bunch of Experts I actually found two things that dr. Acton didn't test: These are the concept of rail riding and the concept of bending your axles, So your wheels are canting. So, let's start with bending the axle so to bend the axles. I use this bending tool from dirty work. So right there you just bend the nail, then you take it out of the clamp and then you have an axle. That'S been at exactly 2.5 Degrees. So if you don't want to go to the hassle, you could actually buy pre bent and pre polished axles online. I put a link to where you can get them in the video description, So bent. Axles are important for two reasons. The first is that it reduces friction, And this is because, as you roll down the track to weigh the axles are bent the wheels want to migrate outwards And that's good, because it reduces friction in the sense that part. That'S rubbing is The wheel and the nail head, which has a much lower coefficient of friction than if the wheels just bouncing around Rubbing against the wooden body of the car. The second reason They're really important is it makes alignment a hundred times easier, We'll get to that in a minute, and now I just put the wheels on the car - And this is a good time to apply the graphite just get it everywhere. You really can't over apply it and now because I'm going our car to only write on three wheels, I Deepen one side of the pre-cut axle groove in the front and now because it's deeper that front left wheel won't touch the ground. So Now you see, I am just pushing these axles. In my hand, I mean there are tools that sell for like ninety dollars that help you align them and people talk about drilling the hole is just Perpendicular, but it really doesn't matter if you're using cannon axles. You just kind of put them in the pre-made slots And then afterwards I just use a screwdriver just to make sure the nails were actually flush in each of those slots And it doesn't matter because with the cannon axles, you can align it later. So this is where it leaves us at the front and left wheels rates it up off the ground. You can see the back two Wheels or can it outwards, but you notice the front wheel is actually candid the opposite Direction. This is the other thing drak that didn't look at, but it was called the rail righty technique. Now rail riding means you Intentionally steer your car into the rail that runs down the track and guides your car. Now That sounds crazy, like it's totally going to increase your friction and a lot of experts recommend spending Hours and hours on a line of your car, so it runs perfectly straight. So the problem with that is no track has a perfect surface, so even the Perfectly aligned car is going to bounce around on the track.
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