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Post by AtomHeartDragon on Aug 16, 2018 9:00:49 GMT
is exhaust velocity really what matters? I just built a fluorine hydrogen rocket that's way more (2x) propellant efficient than a nuclear thermal rocket with 2x the exhaust velocity... about the same wet mass, dry mass, and dV. Propellant mass and exhaust velocity multiplied give total momentum your propulsion can impart on your ship. Divide that by ship's dry mass and you have delta-v. Is your stoichiometry ok? If you have found a new bug, report it.
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Post by Apotheon on Aug 16, 2018 21:55:07 GMT
I optimize modules (while keeping a certain desired performance) for low cost mostly; this tends to go hand-in-hand with low mass (since it costs more to have more of the same mass, obviously). Real-life costs and masses may not exactly mirror CoaDE, but they'll be close enough for the purposes of the simulation, and replacement materials should be available for most outliers. Diamond will be easier to make when we have manufacturing in space (which CoaDE assumes), since having vacuum is part of the CVD process, and solar power is continuous and plentiful. Carbon can be sourced from Venus' CO2; it's a great place for the diamond industry to locate. Hush! I was just curious what exactly in the game costs "1" credit and kinda how value is assigned to each material, but infrastructure in general is really interesting. Might create another thread.
is exhaust velocity really what matters? I just built a fluorine hydrogen rocket that's way more (2x) propellant efficient than a nuclear thermal rocket with 2x the exhaust velocity... about the same wet mass, dry mass, and dV. Propellant mass and exhaust velocity multiplied give total momentum your propulsion can impart on your ship. Divide that by ship's dry mass and you have delta-v. Is your stoichiometry ok? If you have found a new bug, report it. Oh, to clarify what I meant was propellant cost efficency. I guess that completely depends on what propellants are the cheapest... aaand fluorine (and a little hydrogen) is considerably cheaper than methane!
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ghgh
Full Member
Still trying to make kinetics work.
Posts: 136
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Post by ghgh on Aug 17, 2018 0:30:20 GMT
Hydrogen is actually more expensive due to the cost to transport. Going by stock modules, one KT of hydrogen is 11.5 MC, total mass of 1.13 KT, and 3125 square meters of cross section right off the bat. That's before armor, reactors, crew, etc. Methane on the other hand, going by stock containers, gives you 2.11 MC, total mass of 1.04, and a cross section of 1346. That means HD has 90 more tons wasted on storage then methane would require, in addition to costing more then 5 times more. Hydrogen Deuteride is great for civilian ships which don't care about thrust or having a wide cross section. Warships on the other hand need to be built with the intent of getting shot at and it is harder to hit a small fast target then it is to hit the Hindenburg in space.
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Post by The Astronomer on Aug 20, 2018 4:44:52 GMT
I like how Apotheon's tone was cheerful and then ghgh just steamrolled his point with emotionless math.
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Post by Apotheon on Aug 24, 2018 20:59:00 GMT
I like how Apotheon's tone was cheerful and then ghgh just steamrolled his point with emotionless math. He's explaining that hydrogen isn't cost effective, yeah? I know that already. What I intended is that fluorine-hydrogen is cost effective, because of how cheap fluorine is and the stoichiometry between them.
By the way, there's apparently nothing in the game that costs "1" credit, at least going by the list of stuff in the infolinks!
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Post by phoenixzix on Sept 19, 2018 14:27:13 GMT
my first impression: This guy plays too much EVE (ISK reference is way too obvious)(fun fact: Icelandic currency is called Icelandic Krona, with acronym ISK) and yeah, fluorine is cheap, before you start factoring accidents and mishaps and poisonings and unintended combustion etc etc
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Post by AtomHeartDragon on Sept 19, 2018 15:07:33 GMT
my first impression: This guy plays too much EVE (ISK reference is way too obvious)(fun fact: Icelandic currency is called Icelandic Krona, with acronym ISK) and yeah, fluorine is cheap, before you start factoring accidents and mishaps and poisonings and unintended combustion etc etc And poisonings combined with unintended combustion, etc.
Fluorine is weird like that.
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Post by Apotheon on Sept 25, 2018 21:20:09 GMT
my first impression: This guy plays too much EVE (ISK reference is way too obvious)(fun fact: Icelandic currency is called Icelandic Krona, with acronym ISK) and yeah, fluorine is cheap, before you start factoring accidents and mishaps and poisonings and unintended combustion etc etc You mean qswitched or me? ~70 hours a week, once.
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Post by Rocket Witch on Sept 26, 2018 17:24:07 GMT
Not to be pedantic but wouldn't they be solar credits or maybe just.. credits? Not even that. "c" stands for "currency-unit". It's a generic monetary stand-in for all possible future currencies across all factions.
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Post by AtomHeartDragon on Sept 26, 2018 19:53:02 GMT
Not to be pedantic but wouldn't they be solar credits or maybe just.. credits? Not even that. "c" stands for "currency-unit". It's a generic monetary stand-in for all possible future currencies across all factions. Not even qswitched can stand in the way of people calling it "credits" - it's an ur-scifi trope.
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