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Results tagged with atmospheric-drag
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user 26
Questions regarding atmospheric drag which includes the resistance offerd by a moving object in fluid
3
votes
1
answer
702
views
Why did HARP make projectiles in the rocket shape?
HARP fired projectiles from a gun into suborbital trajectories. This type of projectile carried a scientific payload, but did not have any reaction engines (although later proposals did). Their desi …
- 16.4k
30
votes
Accepted
Effect of atmospheric drag on rocket launches and benefits of high altitude launch sites
I'll give you the numbers. I'm breaking this up into 3 different terms. There's atmospheric drag, what I'll call the "hover" term, and the gravitational potential climb. I will more or less assume …
- 16.4k
1
vote
Benefits of hydrogen cannon for first stage launch at sea level or 20,000 feet
The short answer is "obviously yes". A sea-level launch accepts an additional penalty from the atmosphere. This has several very serious impacts:
Limits the minimum economic payload, and thus, minim …
- 16.4k
12
votes
1
answer
265
views
Are there any proposals to vacuum up gases in orbit for use as propellant?
Space stations like the ISS orbit at an elevation that puts them squarely in the Thermosphere, and while this has extremely rarefied gas (which is probably more accurately a plasma at many times), it …
- 16.4k