I get a minimum height of 2.5R. So if the loop is 4 meters high (with a radius of 2 meters), the car would have to start 5 meters above the ground. That’s it Create a loop. Of course, this assumes that there is no loss of energy due to friction. You might want to start a little higher to account for this.
But not too much…
In fact, why cut it off? Why not just get started? a lot The supreme and the end of all doubts? This is because the faster the car goes, the more g forces the driver experiences in the loop.
Let’s think about it: If you let a car roll around at a minimum speed, there will be zero forced from the track (FT). You’ll feel weightless — zero g — for a moment. If the car is released from a height greater than 2.5R, its speed will be greater than the minimum at the top of the loop. To still move in a circle, the force of gravity would not be enough. The track will also have to be pushed down onto the vehicle. This will create a g force greater than zero.
Let’s go back to the actual stunt video. From the loop comparators, I’m guessing it has a radius of 2 meters. The car has clearly been dropped from a height above at least 5 meters — let’s say it’s 8 meters. The force at the top of the loop (divided by the weight, to get it in g) will be 3 g. It is possible for humans to tolerate up to 20 grams, so it should be fine.
But if you go to the extreme? If you start too high and make the loop too short, bad things can happen. What about a height of 20 m with a radius of 1.5 m for a loop? This will produce a force of 21 g. It may sound cool, but it can also kill you. It’s not fun anymore.
