|
|
Post by evonix on Apr 3, 2017 17:20:11 GMT
Everybody loves decane and theres hydrogen-duturide for high performance but it has gotten a bit stale, for example I find semi-heavy water is almost as good as decane and much denser but that's just a start, how about xenon, or murcury or all those other things?
|
|
|
|
Post by bigbombr on Apr 3, 2017 18:58:45 GMT
Everybody loves decane and theres hydrogen-duturide for high performance but it has gotten a bit stale, for example I find semi-heavy water is almost as good as decane and much denser but that's just a start, how about xenon, or murcury or all those other things? RP-1 is denser than decane (it behaves like dodecane), but has a much higher exhaust velocity than semi-heavy water. I'm personally very fond of methane, it's exhaust velocity is only lower than hydrogen and hydrogen-deuteride, but it's more compact and extremely cheap. Considering propellant is often a large fraction of your ships' cost, picking a cheap propellant can lead to major cost savings. |
|
|
|
Post by xenophon13 on Apr 4, 2017 21:39:18 GMT
For maximizing thrust (at the expense of exhaust velocity), I so far haven't found anything better than CO2. |
|
|
|
Post by Durandal on Apr 4, 2017 21:41:45 GMT
For maximizing thrust (at the expense of exhaust velocity), I so far haven't found anything better than CO2. Hot damn. I'm not at my computer atm. Is CO2 a stock fuel or is it modded in? |
|
Hyperant
New Member
Owner of Hyper Productions
Posts: 32 
|
Post by Hyperant on Apr 4, 2017 22:01:25 GMT
Stock.
|
|
|
|
Post by evonix on Apr 6, 2017 17:38:32 GMT
Everybody loves decane and theres hydrogen-duturide for high performance but it has gotten a bit stale, for example I find semi-heavy water is almost as good as decane and much denser but that's just a start, how about xenon, or murcury or all those other things? RP-1 is denser than decane (it behaves like dodecane), but has a much higher exhaust velocity than semi-heavy water. I'm personally very fond of methane, it's exhaust velocity is only lower than hydrogen and hydrogen-deuteride, but it's more compact and extremely cheap. Considering propellant is often a large fraction of your ships' cost, picking a cheap propellant can lead to major cost savings. Yes but S-water is almost a 3rd more dense making it good for people who want lots and lots of armor. EDIT: On the other hand now that I think about it you probibly weren't dissagre about that |
|
|
|
Post by Rocket Witch on Apr 12, 2017 3:39:27 GMT
One that hasn't been mentioned is helium. Good where safety is concerned because it's inert (not that the game models this), but it does seem difficult to optimise a lightweight reactor to pass it through. If you wanna go into mods we've got cubane, ethanol, hexadecane*, icosane*, diborane, pentaborane, and lithium tripropellant mixtures for combustion rockets that can achieve NTR exhaust velocities. I'm also supposed to be finishing methanol and borazane eventually. childrenofadeadearth.boards.net/thread/917* These two aren't in the thread linked above as I just did them today, so see here: childrenofadeadearth.boards.net/thread/1163For maximizing thrust (at the expense of exhaust velocity), I so far haven't found anything better than CO2. What about nitrogen? |
|
|
|
Post by vegetal on Apr 12, 2017 3:43:13 GMT
Ethanol? That sounds cool, I use it in my car. Let's grow sugarcane in space to fuel our rockets!
|
|
|
|
Post by Enderminion on Apr 12, 2017 10:27:51 GMT
Ethanol? That sounds cool, I use it in my car. Let's grow sugarcane in space to fuel our rockets! or the lighter methanol |
|
|
|
Post by xenophon13 on Apr 13, 2017 20:28:19 GMT
For maximizing thrust (at the expense of exhaust velocity), I so far haven't found anything better than CO2. What about nitrogen? Preliminary tinkering is only getting me about half the thrust for the same exhaust velocity. Plus, it's only about half as dense as CO2 |
|
|
|
Post by evonix on Apr 14, 2017 1:31:17 GMT
Science should be done to this question, only really usefull for short range KKVs but still. Also in a very steep gravity well I suppose. Will science it tomorrow.
EDIT: Sciencing progress report 1:(Note, I aint great at this but I think it's consistent, someone else could give a 20% all 'round boost.)CO2 does not seem all that great, I can't seem to get above 1kg TWR(no gimble on these.) to HD's 1.15kg.(also all of these have the smae fuel: 1kg of enriched 233) Xenon seems to have... potentual however, it acts very odd as a fuel but possibly in good ways, so far I have 1.51kg, I suspect I have made a basic design flaw with these however as I remember seeing 3kg engines.
EDIT2:RP-1 gets 2.61kg with almost 5 times the efficiency of the rest, starting to get somewhere.
|
|
