Linked Questions

5
votes
2answers
815 views

Why launch from sea level and not Denver? [duplicate]

Why do we launch space satellites and vehicles from sea level and not from a higher locale like Denver? Is saving a mile not more fuel efficient? Gravity is less the further away from center or is ...
4
votes
1answer
777 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
289 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 ...
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
182 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 ...
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 ...
11
votes
3answers
521 views

Have all spacecraft on record been launched from land?

Water is a little buoyant which may be part of the reason a lot of commerce happens on the waves. How much of a difference in terms of fuel would it make if the craft were launched from a water-body?...
4
votes
2answers
1k views

How much thrust to launch a regulation size FIFA soccerball into orbit

How much thrust is necessary to launch a regulation size FIFA soccer ball into orbit around the Earth? Let us assume a size 5 which weighs between 420g and 450g. Remember, we will need thrust to ...
5
votes
3answers
555 views

Shapes of rockets on the Earth with no atmosphere

What would rockets look like if the Earth had no atmosphere? How much easier would it be to launch satellites, and how much harder will it be to launch returnable manned missions?
6
votes
6answers
2k views

If money weren't an issue, what's the best way to get maximum mass to LEO in 1 year? 5 years? 10? [closed]

I can kick this over to World Building if it's more appropriate, but I was hoping to get an actual technical examination of this. So here's the question: if money were not an issue and for some reason ...
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
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
2answers
445 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 ...
2
votes
3answers
579 views

Could pull from a space elevator be used to assist a rocket launch?

Well, more specifically, using a counterweight like you'd find in a non-space elevator to give the rocket a little acceleration before firing up and spending all that fuel-to-lift-the-fuel-to-lift-the-...
2
votes
2answers
327 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 ...
2
votes
1answer
145 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
2answers
175 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
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 ...
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 ...
6
votes
0answers
99 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 ...