A new low has hit the forums, jesus christ this is low.

i did not read all but i put this together what does everyone think



ok mix substance a with substance b and it causes them to expand and

normally it would expand in all directionsas below





a--->

Originally posted by Silver Shadow
I am absolutely stunned that none of you guys understand jet or rocket propulsion, it is junior grade physics.

The basic idea is that you have a chamber with a high pressure inside

Heyyy... What sort of disinfo satanist COINTELPRO psyop secret nasa man-in-black propaganda are you spreading here!!!

Coh, Trying to fool us all with your factual lies and logical fidgy-widginess!!



j/k - and back to the topic, good post.



I do hope it does make some difference to the OP's line of thought.

Would everyone quit insulting the OP?
Not that I agree about this particular topic, but, many question the moon landing.
The vast amount of churches I have attended never speculated about rocket fuel or government collusion in faking space endeavors.
That is not usually their focus.
His speculation on rocket propulsion doesn't deserve such behavior, IMO.

Hey, Manasseh tell you what.

Why don't you design a rocket motor that has a blast shield on a tether that reels out as you apply power to the rocket motor - so your rocket can push against the shield trailing behind the rocket. When it gets too far away for any push, you just turn the rocket off and reel the shield back in and start the process over. Hell, maybe you could even use a bungee cord and the stored energy in the return will push you again - power - bing -bang - power - bing -bang-power... You can call it a push me pull you rocket.


[edit on 14-8-2008 by verylowfrequency]

Originally posted by defiance
Same effect on a gun's recoil...bullet has a small mass but exits the gun at a very high velocity, in return the gun gets pushed back. Using intuition, do you think firing a rifle in a vacuum will have no recoil?

Aww lol, I made it so many pages after my post about recoil that I was hoping it would be the only one That teaches me to read more before posting, as I usually do but neglected to do this time !!

Well put.

Originally posted by LeeHawt
A gun would not fire in space because there is no oxygen, therefore stopping the firing pin from igniting gunpowder. But your an aerospace engineer

Nitrocellulose and nitroglycerin combnations do not need an external oxidation source...

But you knew that, right?

and dont forget that once in space the shuttle uses little gas jets to move around

i want to say that the fuel is oxygen rich fuel meaning that when its burned it releases the oxygen, but i'm not that smart its just a guess.



Keeper

Do you really think it's worth your time to try to explain fundamental physics to someone with a Neolithic world-view? Based on the original poster's comments, drawn to their logical conclusion, electronics don't work either - it must be demons in those boxes trying to seduce us.

Originally posted by Office 4256
Do you really think it's worth your time to try to explain fundamental physics to someone with a Neolithic world-view? Based on the original poster's comments, drawn to their logical conclusion, electronics don't work either - it must be demons in those boxes trying to seduce us.

Good point.

I've always wondered about the OP's question myself.

I see a lot of arrogant and condescending answers here. People are giving all kinds of examples and comparisons that are blatantly incompatible with the subject, eg:

"Swimming, pushing against water"

"Standing on ice, throwing hockey pucks"

"Sitting on an office chair with wheels, throwing stuff"

"Shootin a gun and feeling recoil", etc. etc.

All of these examples show a situation where there's 1G gravity and an atmosphere, and have absolutely no meaning when it comes to the OP's question.

I see other explanations, like "the exhaust gas pushes against the nozzle".

How can it push against the nozzle, if there's is nothing on the other end to force itself against? Wouldn't the gas just spill out, without thrust?

Also, people say you can recreate this situation in an experiment on Earth, we can create a vacuum here, but how do you recreate the abscence, or lack of gravity, in that experiment on Earth?

I don't know, maybe it's just me, but sofar I haven't seen a satisfactory explanation yet.

The only explanation that comes close, to me, is that the whole thing works because of differences in pressure, but I still can't get my head around it.

[edit on 14/8/08 by enigmania]

Originally posted by enigmania
All of these examples show a situation where there's 1G gravity and an atmosphere, and have absolutely no meaning when it comes to the OP's question.
Also, people say you can recreate this situation in an experiment on Earth, we can create a vacuum here, but how do you recreate the abscence, or lack of gravity, in that experiment on Earth?

Physics 101: All mass has gravity, only the smaller the object, the further away from Earths gravitational field you have to be in order to measure the gravity of the object in question.