If I have a zeppilin filled with hydrogen and small turbines what speed do I need to reach to go into space?

Answer 1

Hydrogen will only lift you until its density is equal to the air around it. As you go up, the air gets less dense, and eventually, will be less dense than the hydrogen in your zeppelin, at which point you will stop rising. You will still have over 100 or so miles to go into space, and you'd still need to reach escape velocity of about 11km/s, which would require rocket engines, not turbines, since you'd have no air once you went got high enough.

Answer 2

If your zeppelin can expand as the air pressure decreases, it will always be less dense than the air around it. So it could provide some lift as long as there was some atmosphere. There would need to be enough atmosphere still above you to lift your payload. It would take some engineering to figure out how high that would get you. From there, as was already mentioned, you could use a rocket engine to get you the rest of the way. This is similar to the technique already used where a conventional aircraft carries a spacecraft high into the atmosphere, more economically than additional stages of rocket engine, then releases it to let a rocket do the rest of the work. Related ideas have been proposed for the next generation of space shuttle.

Answer 3

Well If you want to turn the turbines off after a while, you would need to reach Earth's Escape Velocity which is about 11.2 km/s. So, If you're still being propelled by the turbines, it would be something less than (but not much less than) 11.2 km/s

Answer 4

The velocity required to achieve orbit does not depend on the nature of the vehicle; it is about 17,500 mph. A zeppelin cannot move much faster than 100 mph because of air resistance.

Answer 5

mmm....i think you'd have to worry about implosion first