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16 |
1,519 |
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Hydrogen peroxide helicopter by
Andrew Nowicki
Andrew Nowicki wrote:
AN The turbines are placed in the tips of the helicopter
AN blades, so the propellant is compressed by the
AN centrifugal force like...
( 1 2)
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16 |
1,933 |
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variant of a Dyson sphere by
Kent Paul Dolan
"Tim Tyler" wrote:
Still, maybe ringworld - along with "solid" Dyson
spheres - is still too far out for serious
discussion ;-)
Well,...
( 1 2)
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August 3rd 04 04:02 PM
by Alcore
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1,056 |
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Small GPS by
[email protected]
Hello, I'm a member of a group building a CubeSat based Pico Satellite.
I am attempting to find a standard GPS reciever, perhaps one with
multiple antennas to...
( 1 2)
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791 |
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972 |
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1,067 |
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Plutonium Batteries by
Rodney Kelp
How long do plutonium batteries last?
What voltages do they come in?
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system...
( 1 2)
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16 |
1,220 |
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Best Tech Heat Shield by
[email protected]
The Space Shuttle heat shield has changed over time. Basically they
have replaced tiles with things requiring less maintence on the less
critical (cooler)...
( 1 2)
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15 |
1,418 |
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Why Xenon? by
Roland
The header of the message pretty much says what my question is: Why is
Xenon the propellant of choice for an ion thruster?
What makes it a better choice than...
( 1 2)
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15 |
1,196 |
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Orbital simulator alogorithms by
Hop David
I'm trying to model orbits with Lunar perturbations in Microsoft Excel
My first step is just trying to get an ordinary ellipse without lunar
peturbations. I...
( 1 2)
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April 26th 05 07:01 PM
by
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2,343 |
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Probe to A Centauri by
Parallax
Assume for the sake of argument that we discover an earth mass planet
in the A or B Centauri system. Further assume spectroscopic analysis
detects copious...
( 1 2)
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973 |
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Moving Hubble to 51.6 degrees (near ISS) by
Explorer8939
Anyone know the delta-V to move Hubble to 51.6 degrees (while keeping
it near 600 km altitude). What would be the amount of required
propellant, assuming a...
( 1 2)
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15 |
1,243 |
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1,748 |
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Air breathing re-entry concept by
Zoltan Szakaly
I have been contemplating various reentry options for my imaginary air
breathing SSTO vehicle. If I can solve the problem of going to orbit
by using an air...
( 1 2)
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1,871 |
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Von-Braunian space stations: what orbit? by
Steve Mazerski
I have grown up thinking some day there will be large
orbital space stations of the type suggested by von Braun
serving as staging points for journeys to the...
( 1 2)
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15 |
1,560 |
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Low mass ratio SSTO by
Ian Stirling
Zoltan Szakaly wrote:
I spent the last few days reading past messages in this group on the
subject of SSTO vehicles. It seems to me...
( 1 2)
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