Linked Questions

2
votes
2answers
177 views

How fast could a fully fueled Falcon 9 go to propellant depletion if started in a vacuum

I guess my question is related to somehow assembling and fueling a falcon 9 in LEO then launching it. I would say if all stages were fully fulled and the Merlins were all vacuum optimized. Situation ...
2
votes
2answers
330 views

Benefits of hydrogen cannon for first stage launch at sea level or 20,000 feet

I found three videos (2009 Google Tech Talk, 2011 International Mars Society Convention, 2011 Quicklaunch Inc.) from Dr. John Hunter about using a hydrogen gas cannon to launch payloads into space (or ...
-4
votes
2answers
447 views

Wouldn't it be better to leave Earth less dramatically? [closed]

I'm not claiming this concept outlined below as a massively original idea. But perhaps the idea of "gentle" access to space is unusual? What I'm talking about is a High-Altitude Platform (HAP), kept ...
8
votes
1answer
4k views

Where is the optimal location to launch payloads to outer space?

Imaginary scenario: The US, Russia, China, Europe, India, and all the private space companies in between combine resources for a sustained space exploration program beyond Earth. They can choose any ...
6
votes
1answer
2k views

What is the delta-V equivalent to cross the Kármán line in vertical (suborbital) flight?

...or, well, for a typical example - how much delta-V does New Shepard carry? For orbital launches, there's the ~1km/s estimate to overcome drag and gravitational losses on orbital launches; 8km/s of ...
4
votes
1answer
829 views

Why rockets are launched from sea level and not highlands? [duplicate]

This Is a question that was buzzing me, but since every meter of altitude a rocket consume an absurd amount of fuel, wouldn't be more efficent launching rocket from higher altitudes? Thinking to ...
4
votes
1answer
2k views

How much fuel would be required to send a 300g satellite to space using Rockoon?

How much fuel would be required to send a 300g satellite to space using a rockoon that can travel to a height of 32 km, and then send the satellite to a inclination of 28, Apogee: 350 km, Perigee: 280 ...
4
votes
1answer
292 views

Launch from the top of high places [duplicate]

Would launching space ships at the top of high places (like buildings or mountains) would have significant effect? What would be the height where launching would be less energy-/fuel-consuming than ...
2
votes
1answer
146 views

High altitude balloon + rocket [duplicate]

I heard that most of a rocket's power is used to get out of the atmosphere. So I was wondering if it would it work to send a very low powered rocket (maybe even something that was simply shot using ...
2
votes
1answer
110 views

Have there been any designs for multi staged space tethers?

My understanding of the idea of a space tether is that currently you wouldn't be able to build one because even just having it support it's own weight we don't have strong enough material, and with ...
6
votes
0answers
100 views

How do you minimise sum of atmosphere and gravity loss?

I am attempting to calculate the optimum trajectory of a space shuttle going into orbit, taking into account gravitational and atmospheric losses. How would it be possible to minimise the sum of these ...
5
votes
0answers
120 views

How much cheaper would a high level launch be from a sea level launch? [duplicate]

What is the difference in delta-V required for a launch from the highest natural point on Earth (about 8,800 m or 29,000 ft) as opposed to a sea level launch? Assuming a completely ground based ...
4
votes
0answers
178 views

Launch altitude and fuel cost [duplicate]

In this question, higher altitude launches are discussed, but no one seems to address fuel consumption. Let's take the Saturn V for example. A Saturn V rocket on the launch pad weighed approximately ...
0
votes
0answers
183 views

What is the effect of launching from higher altitude on fuel burn and rocket performance? [duplicate]

There are many sites around the world apart from USA, that have such great locations to launch from. Saving hundreds of thousands of dollars in fuel costs. Can someone assist me with a model that ...
0
votes
0answers
145 views

What factors prohibit building a space cannon to launch raw materials? [duplicate]

I am envisioning a magnetic cannon to launch materials directly from Earth's surface to geosynchronous equatorial orbit. The parameters I have in mind are a near vacuum launch tube, about 10 km in ...

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