Community > Forum > Technology & Science > alkaline metal drives?

alkaline metal drives?

Posted by: TerraMrs - Sun Dec 21, 2003 6:51 pm
Post new topic Reply to topic
 [ 18 posts ] 
alkaline metal drives? 
Author Message
Space Walker
Space Walker
avatar
Joined: Tue Aug 07, 2007 12:45 pm
Posts: 151
Post    Posted on: Fri Jan 18, 2008 8:59 pm
There are places in the world where the salt concentration is already high enough to make any environmental impact from dumping more salt negligible.

That's not why I resurrected this old topic though.

I looked at a table for energy density, and noticed aluminium being very high on energy/weight and especially energy/volume compared to other substances. Hydrogen has great energy/weight ratio but poor energy/volume ratio. Would it be possible to use aluminium as fuel for an upper stage? Powdered aluminium mixed with some liquid fuel, perhaps? Or just liquid aluminium (melting point about 660 C)?


Back to top
Profile
Moderator
Moderator
avatar
Joined: Mon Feb 09, 2004 4:01 am
Posts: 747
Location: New Zealand
Post    Posted on: Fri Jan 18, 2008 10:33 pm
Kerosene fuels are often spiked with powdered aluminum. You can do the same with hydrogen, your ISP goes down but the density goes up quite a bit.

_________________
What goes up better doggone well stay up! - Morgan Gravitronics, Company Slogan.


Back to top
Profile ICQ YIM
Moderator
Moderator
avatar
Joined: Thu Jun 03, 2004 11:23 am
Posts: 3745
Location: Hamburg, Germany
Post    Posted on: Mon Apr 13, 2009 7:47 am
Under www.bernd-leitenberger.de it is mentioned that Lithium and Beryllium as well as their hydrides have very high ISPs.

They obviously can't applied in air and cause significant environmental pollution and are toxic. So on Earth they can't be used vby first stages.

They aren't researched much and would have to be used by hybrid drives.

I am not sure if Lithium shoud be consumed such a way - accumulators use them and what are the existing amounts on Earth?



Dipl.-Volkswirt (bdvb) Augustin (Political Economist)


Back to top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 18 posts ] 
 

Who is online 

Users browsing this forum: No registered users and 19 guests


© 2014 The International Space Fellowship, developed by Gabitasoft Interactive. All Rights Reserved.  Privacy Policy | Terms of Use