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Science > Physics |
| User: |
"" |
| Date: |
17 Jan 2006 01:54:02 PM |
| Object: |
ethanol rocket? |
The German V-2 rocket was powered by ethanol, apparently because
petroleum fuels were scarce for Germany.
With only about half the energy density of kerosene, would an
ethanol/liq. O2-fuelled rocket achieve Earth orbital velocity?
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| User: "Dirk Bruere at Neopax" |
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| Title: Re: ethanol rocket? |
17 Jan 2006 02:50:36 PM |
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wrote:
The German V-2 rocket was powered by ethanol, apparently because
petroleum fuels were scarce for Germany.
Combustion chamber temp is lower for ethanol.
With only about half the energy density of kerosene, would an
ethanol/liq. O2-fuelled rocket achieve Earth orbital velocity?
Probably if it was big enough
--
Dirk
The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
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| User: "cnctut" |
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| Title: Re: ethanol rocket? |
17 Jan 2006 09:49:03 PM |
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Here's a few possible propellent combos to get you started:
Oxidizer--------------Fuel---------------Isp(specific impulse)
Oxygen-----------Kersosene------------249
Oxygen-----------Gasoline---------------252
Oxygen-----------Hydrogen--------------345
Oxygen-----------Ethyl Alc--------------242
Oxygen-----------Methol Alc------------237
Oxygen---Methol/Ethyl (95-5)--------234
Google specific impulse and start the calculations.
Good Luck
Tut
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| User: "" |
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| Title: Re: ethanol rocket? |
17 Jan 2006 02:05:02 PM |
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In sci.physics wrote:
The German V-2 rocket was powered by ethanol, apparently because
petroleum fuels were scarce for Germany.
The US Redstone missile also used alcohol.
With only about half the energy density of kerosene, would an
ethanol/liq. O2-fuelled rocket achieve Earth orbital velocity?
Who cares since more efficient fuels were developed many decades ago?
--
Jim Pennino
Remove .spam.sux to reply.
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| User: "" |
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| Title: Re: ethanol rocket? |
17 Jan 2006 03:09:20 PM |
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wrote:
In sci.physics wrote:
The German V-2 rocket was powered by ethanol, apparently because
petroleum fuels were scarce for Germany.
The US Redstone missile also used alcohol.
With only about half the energy density of kerosene, would an
ethanol/liq. O2-fuelled rocket achieve Earth orbital velocity?
Who cares since more efficient fuels were developed many decades ago?
I'm just curious to know if ethanol can do it. Yes, I know the
Russians used kerosene, and the US space shuttle uses, what, liquid
hydrogen or methylhydrazine.
Thinking, say, if in the future crude oil approaches $200+/bbl, could a
small-scale space operatioins company use ethanol to launch satellites
into orbit; would the physics permit it? Especially since the R&D were
performed in the 1940s.
I'm sure there are equations out there somewhere, that relate fuel
energy density to vehicle velocity, but not being an aerospace
engineer, I'm not familiar with them. If you have the equations handy,
please let me know...
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| User: "Dirk Bruere at Neopax" |
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| Title: Re: ethanol rocket? |
17 Jan 2006 03:13:42 PM |
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wrote:
jimp@specsol.spam.sux.com wrote:
In sci.physics wrote:
The German V-2 rocket was powered by ethanol, apparently because
petroleum fuels were scarce for Germany.
The US Redstone missile also used alcohol.
With only about half the energy density of kerosene, would an
ethanol/liq. O2-fuelled rocket achieve Earth orbital velocity?
Who cares since more efficient fuels were developed many decades ago?
I'm just curious to know if ethanol can do it. Yes, I know the
Russians used kerosene, and the US space shuttle uses, what, liquid
hydrogen or methylhydrazine.
Thinking, say, if in the future crude oil approaches $200+/bbl, could a
small-scale space operatioins company use ethanol to launch satellites
into orbit; would the physics permit it? Especially since the R&D were
performed in the 1940s.
I'm sure there are equations out there somewhere, that relate fuel
energy density to vehicle velocity, but not being an aerospace
engineer, I'm not familiar with them. If you have the equations handy,
please let me know...
http://www.braeunig.us/space/propel.htm
--
Dirk
The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
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| User: "Jan Panteltje" |
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| Title: Re: ethanol rocket? |
17 Jan 2006 03:49:29 PM |
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On a sunny day (17 Jan 2006 13:09:20 -0800) it happened
wrote in
<1137532160.369034.182270@o13g2000cwo.googlegroups.com>:
jimp@specsol.spam.sux.com wrote:
In sci.physics wrote:
The German V-2 rocket was powered by ethanol, apparently because
petroleum fuels were scarce for Germany.
The US Redstone missile also used alcohol.
With only about half the energy density of kerosene, would an
ethanol/liq. O2-fuelled rocket achieve Earth orbital velocity?
Who cares since more efficient fuels were developed many decades ago?
I'm just curious to know if ethanol can do it. Yes, I know the
Russians used kerosene, and the US space shuttle uses, what, liquid
hydrogen or methylhydrazine.
Thinking, say, if in the future crude oil approaches $200+/bbl, could a
small-scale space operatioins company use ethanol to launch satellites
into orbit; would the physics permit it? Especially since the R&D were
performed in the 1940s.
I'm sure there are equations out there somewhere, that relate fuel
energy density to vehicle velocity, but not being an aerospace
engineer, I'm not familiar with them. If you have the equations handy,
please let me know...
sci.spacetech
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