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Post by gedzilla on Mar 12, 2017 11:54:02 GMT
right now, there are 3 main types of propulsion sytems for capital ships. (discounting chem rockets, becuase they just suck). These are general broad specifications btw. all examples/specifications/Pros&Cons0 are used with decane
NTR's: Pros: tons of thrust, no electical power needed (minus that of the gimbals which is quite negligible). Cons: relatively bad isp/exit velocity. my average NTR has an exit velocity of 5.2 km/s, relatively more massy.
MPD's: Pros: Very high isp/exit velocity (can go up to the 100'skm/s), usually quite small/low mass. Cons: Very low thrust, requires tons of electrical power
Resitojets (between NTR's and MPD's, but leans more towars a NTR than a MPD): Pros: higher isp than a NTR (average exit velocity is 6.4km/s), can be decently small/massy Cons: requires some electrical power (low tens of MWs), lot less thrust than an NTR, but more than a sub GW MPD
(cant post the module screenshots right now, when i try it says the forum has reached its maximum attacment limit)
Right now im leaning more towards ResitoJets since the weigh less than an NTR, but have a higher exit velocity, while still being able to burn out of gravity wells (which is something my MPD's have trouble doing), and 30 MW (for my most used model) is a piddling electrical price that i can easily afford to divert from my guns.
HOWEVER, this post is about using more than one propulsion sytem on one ship. before most of my progress got recently delete, most of my ships had MPD's and NTR in the same ship, for the best movement. now that im rebuilding all my modules, and have gotten into Resistojets, im leaning towars Resitojet-MPD combos. i pretty much only use decane in my ships, since its nicely dense, and can seem to preform in NTR, MPD, and Resitojets pretty well.
Do any of you guys have multiple propulsion sytems in your ships ? what sytems ? what fuels ? any of your ships have all 3 sytems (though that would seem to run the crew requirements pretty high) ?
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Post by bigbombr on Mar 12, 2017 14:14:35 GMT
I mainly use ships with methane MPD drives, possibly combined with resistojets. For my ships with guns I use RP-1 NTR's. RP-1 is like decane, but with a slightly lower exhaust speed, slightly more thrust and less volume required (RP-1 has a higher density than decane).
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Post by concretedonkey on Mar 12, 2017 14:17:28 GMT
Methane NTR/MPD. Occaisonally miniature 90 degree resistojet RCS to help aiming big spinal cannons.
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Post by The Astronomer on Mar 12, 2017 14:26:53 GMT
I am not using multiple propulsions in my ship, so I'm just here to be annoying lol.
There are four main groups of propulsion.
1. Thermal Rockets > Solar thermal rockets > Resistojets > Nuclear thermal rockets > Antimatter thermal rockets 2. Explosion drives > Combustion rockets > Nuclear pulse drives 3. Accelerator Drives > Ion and plasma drives > Non-ion drives 4. No-propellant drives > Solar sails > Electrodynamic tethers > Electric sails > Magnetic sails
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Post by gedzilla on Mar 12, 2017 14:52:43 GMT
I am not using multiple propulsions in my ship, so I'm just here to be annoying lol. There are four main groups of propulsion. 1. Thermal Rockets > Solar thermal rockets > Resistojets > Nuclear thermal rockets > Antimatter thermal rockets 2. Explosion drives > Combustion rockets > Nuclear pulse drives 3. Accelerator Drives > Ion and plasma drives > Non-ion drives 4. No-propellant drives > Solar sails > Electrodynamic tethers > Electric sails > Magnetic sails i know there was much more than i was posting, i meant in the game. there is only 3 main propulsion types in the game (since chem rockets just suck)
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Post by The Astronomer on Mar 12, 2017 14:59:39 GMT
I am not using multiple propulsions in my ship, so I'm just here to be annoying lol. There are four main groups of propulsion. 1. Thermal Rockets > Solar thermal rockets > Resistojets > Nuclear thermal rockets > Antimatter thermal rockets 2. Explosion drives > Combustion rockets > Nuclear pulse drives 3. Accelerator Drives > Ion and plasma drives > Non-ion drives 4. No-propellant drives > Solar sails > Electrodynamic tethers > Electric sails > Magnetic sails i know there was much more than i was posting, i meant in the game. there is only 3 main propulsion types in the game (since chem rockets just suck) I know lol, just posting some interesting list like I'd like to do. For my plans on integrating MPDs, I guess unless that ship using H 2 (MPD dominant) or HD (NTR dominant) fuel, it wouldn't be using them.
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Post by gedzilla on Mar 12, 2017 15:03:04 GMT
i know there was much more than i was posting, i meant in the game. there is only 3 main propulsion types in the game (since chem rockets just suck) I know lol, just posting some interesting list like I'd like to do. For my plans on integrating MPDs, I guess unless that ship using H 2 (MPD dominant) or HD (NTR dominant) fuel, it wouldn't be using them. try decane. its decent for NTRs MPDs and Resistojets, and its far denser than H or HD
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Post by The Astronomer on Mar 12, 2017 15:05:36 GMT
I know lol, just posting some interesting list like I'd like to do. For my plans on integrating MPDs, I guess unless that ship using H 2 (MPD dominant) or HD (NTR dominant) fuel, it wouldn't be using them. try decane. its decent for NTRs MPDs and Resistojets, and its far denser than H or HD None of my capital ship uses decane. Thrust is not much of a problem. Delta-v, however, is. I might try to add methane MPD, but I don't know how.
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Post by gedzilla on Mar 12, 2017 15:13:17 GMT
try decane. its decent for NTRs MPDs and Resistojets, and its far denser than H or HD None of my capital ship uses decane. Thrust is not much of a problem. Delta-v, however, is. I might try to add methane MPD, but I don't know how. Dv might to be a prob, but if you use decane resisitojets with an exit velocity of 6.42km/s (the max as far as i know), you can get decent Dv, combine that with properly min maxing for the best armor fit (which sometimes takes careful tweaking of the fuel tanks to properly shape it), and you can easily have 9km/s Dv on a relatively small ship, with enough thrust. one of decane's biggest benefits (besides that it works for all 3 propul types) is that its quite dense, and you can easily keep your cross section down
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Post by The Astronomer on Mar 12, 2017 15:15:58 GMT
None of my capital ship uses decane. Thrust is not much of a problem. Delta-v, however, is. I might try to add methane MPD, but I don't know how. Dv might to be a prob, but if you use decane resisitojets with an exit velocity of 6.42km/s (the max as far as i know), you can get decent Dv, combine that with properly min maxing for the best armor fit (which sometimes takes careful tweaking of the fuel tanks to properly shape it), and you can easily have 9km/s Dv on a relatively small ship, with enough thrust. one of decane's biggest benefits (besides that it works for all 3 propul types) is that its quite dense, and you can easily keep your cross section down New vocabulary learnt. lol
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Post by bigbombr on Mar 12, 2017 15:26:27 GMT
With a 1 GW methane MPD thruster you can easily give a cap ship 15+ km/s of delta-v. If you're really minmaxing, you can have a craft with 20 km/s of delta-v on only 50 tons of methane.
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Post by darthroach on Mar 12, 2017 15:30:23 GMT
I might try to add methane MPD, but I don't know how. If you mean you don't know how to add an MPD to your ships, it's literally as simple as going into ship design and adding an MPD of the same propellant type to your ship.
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Post by newageofpower on Mar 12, 2017 15:42:02 GMT
I might try to add methane MPD, but I don't know how. If you mean you don't know how to add an MPD to your ships, it's literally as simple as going into ship design and adding an MPD of the same propellant type to your ship. I believe Astro has problems engineering efficient MPDs. Anyhow, MPDs are almost completely useless in tactical. :/
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Post by bigbombr on Mar 12, 2017 15:44:34 GMT
If you mean you don't know how to add an MPD to your ships, it's literally as simple as going into ship design and adding an MPD of the same propellant type to your ship. I believe Astro has problems engineering efficient MPDs. Anyhow, MPDs are almost completely useless in tactical. :/ True, but they allow you to conserve propellant for when you need it for dodging.
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Post by The Astronomer on Mar 12, 2017 15:45:43 GMT
I mean, I heard you guys attached MPDs right in the middle of the NTR engines. I don't know how. So I strapped the MPD right at the butt of the ship and they somehow works. 16 km/s, 200 micro-gee of acceleration. 400 MW of power. Cool.
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