Search found 1060 matches

by Heiwa
Thu Jun 20, 2013 3:11 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

Correct me if I'm wrong, but I have a feeling that your puzzling, double-edged and rather nebulous stance aims at ultimately upholding the existence of man-made satellites in low earth orbit - while dismissing, on the other hand, the feasibility of long-distance space travel. Yes, I think the Frenc...
by Heiwa
Thu Jun 20, 2013 9:02 am
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

No propulsion without atmosphere. Newton! So you still do not understand that a propulsion force can be released in vacuum and/or anywhere, e.g. my simple spring? A spring can be mechanical but also in shape of piston with (compressed) gas in it. Release the spring and a force is applied to what is...
by Heiwa
Thu Jun 20, 2013 6:19 am
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

Same goes for a ship in space. You can combust all the gasses you want. If you don't generate an external force you're not going anywhere. People say "the ship is pressing on the gasses" but the gasses don't exist outside the ship. Gas doesn't exist in the vacuum. So the ship is left pressing again...
by Heiwa
Wed Jun 19, 2013 5:43 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

The water stream does not push any water back into the hose. It simply pushes back against the water coming out. It's a fight between expelled water and air pressure. Evidently there are friction forces between the water ejected into the air and the air itself. Anything moving in air is subject to ...
by Heiwa
Wed Jun 19, 2013 4:12 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

I think Heiwa is trying to say that the initial recoil is simultaneous with the opening of the nozzle, and so it is not really dependent on what the water does in the air. In fact, it seems to me you cannot come to an agreement about this firehose issue because you are talking about two different s...
by Heiwa
Wed Jun 19, 2013 2:02 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

The water is flying through the air and the 14.7 pounds per square inch of air pressure is wanting to occupy the space that the water is in, so it exerts an equal force all around the water which creates a friction and causes the water to push back towards the fireman and also towards whatever it's...
by Heiwa
Wed Jun 19, 2013 1:01 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

If you shoot water horizontally, you will notice it forms and arc. This is the key to the fight back by the air, because the top of that water arc is the strongest force against the air, meaning the air has to push on it much harder to try and squeeze it to the ground because that water at the very...
by Heiwa
Wed Jun 19, 2013 2:25 am
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

The reason a water hose works and pushes a fireman back, is the pressure of the jet of water against the air. Can you pls illustrate above with a figure? Evidently there is an invisible friction force between the static air and the flowing water that has left the hose, but how does this invisible f...
by Heiwa
Tue Jun 18, 2013 7:01 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

Do you really think these waterjets produce less thrust than a watertank under high pressure? I just say that a waterjet needs a pump, etc, etc, blah, blah. A watertank under pressure does not need a pump. And a watertank under pressure does not produce any thrust ... unless you open a valve attach...
by Heiwa
Tue Jun 18, 2013 6:07 pm
Forum: Apollo, and more space hoaxes
Topic: MARS & the Curiosity Rover - NASA's latest hoax
Replies: 595
Views: 660243

Re: MARS & the Curiosity Rover - NASA's latest hoax

I have a distinct feeling that the JPL Sky Crane design allegedly used when landing a vehicle on Mars is a military secret that cannot be presented for US national security reasons, e.g. terrorists may be inspired (how to fool or harm you). :rolleyes:
by Heiwa
Tue Jun 18, 2013 5:57 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

A rocket engine fitted to a rocket is very simple. In the rocket is a fuel tank full of fuel. The fuel may be solid or liquid. It has a mass. By burning the fuel in the rocket engine combustion chamber, it becomes a hot gas that expands in the combustion chamber and in order no to blow up the rocket...
by Heiwa
Tue Jun 18, 2013 7:11 am
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

Yes, the thrust of the rocket engine is proprotional to the mass of gas ejected out of the rocket (nozzle) into vacuum but also the velocity of the mass ejected (into vacuum). This is why Moon travel doesn't work. You have to carry the mass (of fuel) with you from start and you simply get too heavy.
by Heiwa
Mon Jun 17, 2013 11:13 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

Yes, a jet engine is different from a rocket engine. A jet engine doesn't work in vacuum. Nor does a car engine. Only rocket engines work in vacuum.
by Heiwa
Mon Jun 17, 2013 6:09 pm
Forum: Apollo, and more space hoaxes
Topic: ENDEAVOUR - the 30-year Space Shuttle hoax
Replies: 793
Views: 1138882

Re: ENDEAVOUR - and the spaced-out NASA efforts

When thunder strikes in the vicinity here on Earth, evidently the sound arrives long after the flash. Same goes for a rocket explosion in space or vacuum. Actually the speed of sound in vacuum is 0, i.e. the sound will never arrive. Maybe they added sound to the video?
by Heiwa
Mon Jun 17, 2013 5:44 pm
Forum: Apollo, and more space hoaxes
Topic: Does Rocketry Work beyond Earth's atmosphere?
Replies: 817
Views: 750554

Re: Why Rocketry Doesn't Work in the Vacuum

Does anybody believe that the exhaust of a car drives the car (and not the internal combustion in the engine). Pls - lock this thread ASAP. :rolleyes: No - I, for one, do not believe the exhaust of a car drives the car. I believe no one does. Instead, it would seem that your contention is that if t...