I get a minimal top of two.5R. So if the loop is 4 meters excessive (with a radius of two meters), the automotive must begin 5 meters above the bottom to simply make the loop. After all, this assumes there isn’t any vitality loss because of friction; you’d in all probability wish to begin a bit greater to account for that.
However Not Too Excessive …
The truth is, why reduce it shut? Why not simply begin a lot greater and eradicate all doubt? The reason being that the quicker the automotive goes, the upper the g-forces skilled by the motive force within the loop.
Let’s take into consideration this: In case you launch a automotive in order that it goes across the loop at minimal velocity, there might be zero power from the observe (FT). You’d really feel weightless—zero g’s—for an immediate. If the automotive is launched from a top better than 2.5R, its velocity could be better than the minimal on the prime of the loop. To be able to nonetheless transfer in a circle, the gravitational power wouldn’t be sufficient. The observe would additionally must push down on the automotive. This is able to create a g-force better than zero.
Let’s return to the video of the actual stunt. By evaluating the loop to the bystanders, I am guessing it has a radius of two meters. The automotive is clearly launched from a top above the 5-meter minimal—for example it is 8 meters. The power on the prime of the loop (divided by the burden, to get it in g’s) could be 3 g’s. It is potential for people to face up to as much as 20 g’s, so this needs to be high quality.
However if you happen to go excessive? In case you begin too excessive and make the loop too small, dangerous issues can occur. What a couple of top of 20 meters with a 1.5-meter radius for the loop? This is able to produce a power of 21 g’s. It would look cool, however it additionally may kill you. That is not enjoyable anymore.
