Rocket propulsion in vacuum

Words with actions or no action.

I do research.  You do not do research.

I read and study.  You do not read and study

And so forth

Why do you have to keep butting into conversations you have no interest in and no ability to contribute to?

Please stop spamming threads with your politically correct happy clappy bullshit. 

Thanks

if you have air pressure pressing on the balloon it is pressing it against the vacuum cleaner. 

An example of an air pressure effect is a hovercraft.  As soon as the rubber skirt of the hovercraft lifts a fraction off the surface the hovercraft can go no higher.

All you need to prove how a rocket works is to do the maths on the amount of material being ejected and know the speed it comes out at.    If stuff comes out the rocket must react in the opposite direction.

It is just very simple physics.   

Yes it's very simple physics. Your problem is in how you're trying to portray action and reaction. Either you are doing this because you are naive or you are a kid, or you are doing it because you want to keep the space rocket bullshit alive. I'll give you the benefit of the doubt and just say you're naive and will learn one day.

"If stuff comes out of the rocket and trails behind it then it will react or the laws of physics are wrong."

I question the trails bit. Using my analogy of the vacuum cleaner - and the pressure on the outside of the balloon is irrelevant, I was only demonstrating the way a vacuum 'sucks' the thrust of the propellant - the vacuum of space surely must ‘suck’ the life out of any released particles and distribute them instantly far and wide to equal out the minute extra bit of stuff that just got added to the so called universe.

Your example with the gun did have me scratching my head a bit more, but opening up a shed load of ‘stuff’ into what might be an infinite vacuum, all I see happening a big flash and an empty rocket still hanging there in ‘space’, with an egg on its chin.

"An example of an air pressure effect is a hovercraft. As soon as the rubber skirt of the hovercraft lifts a fraction off the surface the hovercraft can go no higher."

Yes, it's ejecting more air out the sides so reducing its thrust. Now drop the whole thing into a hyperthetical vacuum, how much thrust does it have now? It has to be none. Just the smell of burning rubber... friction burns from the speed the air is being 'sucked' out of the hovercraft in all directions at once.

And there it still sits.

Wouldn't you're viewpoint have the hovercraft rise up to the sky as the vacuum kicked in?
Can you visualise it sucked tight to the floor?

aliveandkicking is just making any old codswallop up to keep rocketry in a vacuum alive. The one thing he/she's correct about is the vacuum is the absence of all matter which includes those particles of matter that flat about of whatever science makes them out ot be.

I'll give people a basic lesson in science and common sense.
On Earth you breathe in atmosphere. You do this because you are under pressure of atmosphere at around 15 psi - to round it off.
So what exactly does this mean?
Most people don't really know what it means. They simply see a tyre inflated or a tank holding pressure and just accept that it's nothing more than that.

Nobody appreciates the pressure their bodies are under and the fact that the pressure has to be contained, which isn't going to happen on a rotating globe for starters...but let's not let that get in the way.

15 pounds per square inch of pressure upon us, so why don't we get crushed?
Our bodies are made of water, essentially. Basically we are a liquid. We repel the atmosphere because we are dense and do not absorb it - but due to our strength of body, we adapt to that pressure without many real problems in terms of living/existing.

However; start walking up a mountain and you soon need oxygen because your body wants to EXPAND to take in more of the oxygen due to the pressure dropping the higher you go up.
If you were to be lifted higher from this position, your body would simply freeze and then expand because the 15 psi it was under that kept it from expanding, is now NOT pushing against it. The psi gets less and less the higher you go.

Now for all those that are getting a bit lost by what I'm saying, I'd like you to get a vacuum chamber and put in a tied balloon with just a tiny amount of air inside the balloon.
Evacuate air from the chamber that the balloon is in and watch the balloon start to inflate.
Why is this happening?

The reason this happens is because the atmospheric pressure you are pushing out of the chamber is due to pushing out COMPRESSED molecules of matter/atmosphere and now you are allowing the molecules inside the chamber, including the ones in the balloon; to expand .

Ill make this easier for you to understand.

Imagine flling the vacuum chamber with as many sponge balls as you can fit in. You will notice that the sponge balls are all crammed in. Compressed, right? Many of them.
Ok, let's call this 15psi of pressure.
Now we push out some of the sponge balls and the more we push out, the more expanded and LESS amount the sponge balls inside of the chamber become. They are always filling the void by expansion.

Now in real life with atmosphere. Those compressed balls before evacuation would have compressed balls outside of the chamber as well, equalising the pressure.
Once you evacuate the chamber of MANY compressed balls...all you are doing is compressing those balls into a more compressed state outside of the chamber against the compressed atmosphere and adding to it, meaning you are now exerting a bigger crushing force against the chamber which doesn't have the same resistance to it due to expansion and less pressurised molecules inside.
All that's keeping the chamber from collapsing is the strength of the chamber itself. The stronger the pump, the more likely the chamber will collapse (implode) due to more molecules being pushed out, leaving larger expanded molecules and a lot less of them, meaning even weaker resistance to external pressure.

So as you can see. At sea level wth our pressure; we are working on action/reaction. It's us and everything against the atmosphere. Our actions create an equal and opposite reaction. If you breathe out you push out your breath into the atmosphere which pushes right back against you and forces you to equalise the pressure you made unequal, resulting in your breathing.

Now let's send astronauts up into so called space. How do they get out of a closed system?
How do they not expand into a zero psi environment?
How does a fuelled rocket not expand into it?

There MUST be an action and reaction of pressure to equalise it at all times. If not then all is lost.
On Earth floor, at sea level, we play the game perfectly well, as I explained.
What do astronauts play against? or their space craft?

There is nothing pushing back against an astronaut in space so if he/she is space walking in a so called 5 psi prssurised suit against a zero psi external environment, then tell me how a person survives in 5 psi of pressure when they live under 15 psi at sea level?

Tell me why the suit does not tear open to try and equalise the pressure with the external environment because the suit is only stopping free expansion (think about the chamber).
You see, space as we are told, is vast. It's one huge open space of zero pressure and anything of any higher pressure placed into it would have to equalise to it. the problem is, it's so vast (as we are told) that equalisation can't happen, only free expansion of the molecules in the space suit of ship to be lost to space in the blink of an eye, once a breach to the suit of craft is evident, which would be immediate.

Let me just add a little extra just so people can really open up their logical brains.
The space station is apparently (so we are told) pressurised to 14.7 psi in space. This means it is under 15 pounds per square inch of pressure pushing on the inner walls against space which is zero return pressure, meaning there's nothing stopping those walls from expanding outwards except for the wall strength alone.
Now we know that those walls aren't made of compressed air cylinder type metal and we know that they do not have any shape that caters for anything like that, yet there it is just floating about in space with those astronauts not giving a rats arse about pressures and what not.

No problems for them to get into a space walk suit and have it depressurised to 5 psi with no ill effects when someone climbing a mountain will suffer the effects of a pressure drop way before it gets to 5 psi and that's with an equal and opposite reacton. Space does not provide this in their vacuum.

Anyone's logic icking in yet or do I need to actually keep explaining something that should be crystal clear as to how much of a total and utter bullshit scam it all is.

We are filled with total bullshit about space and rocktry in space and all the rest of the crap with meteors, satellites and planets, etc. The list of bullshit is endless.

In an atmosphere this is what happens.  In a vacuum, you got nothing. No atmosphere, no existence of anything, simple as that. It's all been explained.

You can spend the rest of your life wallowing in your own crap. I'm not interested in people like you. What I've put into this forum is for logical people to read. That doesn't involve you or your likeminded friends.
What you know about reality where science is concerned, you could write on the head of a pin. What you think you know about reality is what you've spent most of your life studying. It's called fiction. You might as well have read the entire Enid Blyton famous five collection and Harry Potter books, because the reality you've been asked to go with is very similar to those books and yet you've grown up and still can't figure it out.

You wonder why it's so important to me? Are you frigging kidding me, or what?
How about the fact that I want to live in the real world and not the one that's being decided for me all the time by liars. Space being just one of many lies.

Oh and don't go on about rocket propulsion in a vacuum being simple physics. You've nevr performed an experiment to prove your claim. All you're doing is parroting what you've read up on or been told.

You've been asked to show how a rocket works by explaining what happens inside of it and you dodge it every time. Why?
It's because you nor your buddies you know as NASA have a clue how to explain your rockets to cater for them working in a vacuum.

I've noticed you're keeping your words small just in case you mess up. Any rational thinking person should be able to see through the likes of you people.

What you seem unable to understand is:

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1. Rocket propulsion in a vacuum is simple physics

But

2. The reality of 1 does not mean that humans have been able to leave the atmosphere

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Rocket propulsion in a vacuum was simple physics 300 years ago and nobody had left the atmosphere.

There are no enormous technical challenges with a space rocket. Rocket scientists are very well aware that there are no space rockets. Rocket science is not very technical. In fact it's basic as hell but has been turned into technical because of space travel bullshit..

Your arguments are crap and do not tell anyone anything about rocketry in your supposed vacuum. You can't argue it because you have no clue about it. That's why you can't explain how a rocket works, other than to say that burning fuel one way pushes it the other way and never explain how.

I've explained why it's bullshit.
Keep living your life in darkness.

It's not me having difficulty. It's you having severe difficulty knowing what "recoil" means. Learn it and then come back. Your science brain probably equates to successfully making a saline solution or making fire by striking a match. You don't appear very bright at all. Dimly lit.