This happened years ago when I was very young. I also have no pictures or anything of it, but I wish I did.
So I was little and a pyromaniac. Still am. I would experiment with lighting things on fire, playing with lighters, and plying with the stove. Fire is fun, isn't it?
Anyway, while experimenting with fire and lighters, I found out that if you hold down the trigger of a "long reach lighter" and push it just far enough to the point where it doesn't click, but just far enough, the butane will come out. I figured this out on accident and it made a decently sized flash.
Of course, young me decided to take a cup and hold down the trigger so the cup filled with butane. expectedly, it made a large flame, about 5" high out of the cup.
With my new superpower, I ran around the house filling everything I could find with butane, and lighting it.
I finally came across a vase. The case had a big bottom, and a tight neck, and at the top, a funnel. Kind of like this except the neck was tighter and the funnel was longer.
So on i go filling it up (for quite a considerable time I might add). I sat back and admired my work for a bit. The laws of physics completely left my head as I light the lighter and slowly lowered it into the vase.
In an instant, the butane light and flames and hot air literally rocketed up my arm and into my face.
I spent about half an hour with cold water on my arm, and all my arm hair was gone. Luckily the burns weren't too bad, but it hurt to do anything with my arm for the day and the next.
TL;DR Filled a vase with butane, light it as i forgot the laws of physics, fire literally rocketed up my arm.
The fuel can only ignite if it also is being fed oxygen. Without it all you have is fuel coming out of the engine. Is there already liquid oxygen in the boosters?
Hi! This is for You rocket engineers out here! From my (very limited) understanding, a big problem with reignition of a liquid-fuel rocket engine in space is the 'sloshing' of liquid within the tanks. When the engines are already fired it causes no issue, since the g-forces during acceleration keep the fuel at the 'bottom' of the tank, where the pump is.
But how is this risk, of the pumps running empty, mitigated during reignition? I can imagine you could give the rocket a "push" with reaction thrusters to force the fuel to the bottom of the tank and then start up the pumps, but I haven't managed to find any real literature addressing this problem.
If You know something about this I would be interested to hear Your take on it! Thank You!
I was just reading an article on the RS-25 which produces 512,000-600,000 lbF Thrust, and the SV first stage motor (the F-1) produced 1.6 million lbF thrust and that's the strongest liquid motor ever made.
For comparison the new SLS solid boosters produce 3.6 million lbT. The Space Shuttle SRBs produced 2.6 million lbF Thrust each.
Why is this? Is it just due to the energy stored in the fuel? Do you get a more optimum burn ratio due to grain geometry in solid motors? Or maybe because it doesn't have as much weight in fuel? (I can't find ISP data on the solids, not sure if they even use that measurement due to solid fuel).
Just curious, wanna know if there's a better way of doing things! Thanks!
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Pretty much what the question says. Some of the heaviest rockets like the Saturn V didn't have them, so why are they necessary in rockets like Ariane 5?
Edit: incorrect example for rocket with solid boosters
So I have a great interest in rocketry and I want to attempt to build a liquid fueled rocket engine. Can you give me your ideas on how to learn how they work and how I should find the right fuel types and build the nozzle for example. Thanks!
