max
New Member
Posts: 5 
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Post by max on Dec 26, 2016 20:23:49 GMT
wow, apophys, that is truly glorious! Care to share the build (or at least the MPD)? Really wanna try that baby out.
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Post by amimai on Dec 26, 2016 22:39:17 GMT
Duno, that ship looks a bit slow... actually that thing can do homecoming in 3mo min... damn, deceleration phase is too long UB MK4(Failure design) ...now were talkin!  has a refueller and discarding fuel tanks, this thing can probably do homecoming even faster! |
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Post by lawson on Dec 27, 2016 2:14:15 GMT
 Trajectory: Ship stats: That's 400GW of power on it, using my new 25GW reactors.  Nice! From your trajectory, it looks like you could cut 2-3 days off with a better final braking burn. Specifically, the burn that drops you into an initial orbit around Mars should be MUCH larger. This will reduce the time spent waiting for the burn to start. I'm going to have a hard time beating this record!  |
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Post by apophys on Dec 27, 2016 3:03:09 GMT
wow, apophys, that is truly glorious! Care to share the build (or at least the MPD)? Really wanna try that baby out. The MPD (4 of these):  Might be able to do better with different propellant. Could probably do exactly the same flight with 1/4 of the ship, generating 100GW power for use with one MPD. To improve, though, you'll need more acceleration. Radiators are boron nitride. Reactors are my 25GW 2400K posted recently on the standards thread and reactor thread. Neon tanks are boron. |
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Post by apophys on Dec 27, 2016 3:30:55 GMT
From your trajectory, it looks like you could cut 2-3 days off with a better final braking burn. Specifically, the burn that drops you into an initial orbit around Mars should be MUCH larger. This will reduce the time spent waiting for the burn to start. I burn for nearly the entire route, in one way or another. The big decelerating burns are along the velocity direction, so dV is not wasted. I tried to move decelerating burns as close to the end as possible, so it's efficient for speed (it may not appear so from the image due to zoom & perspective). The whole final braking is done in 2 days, from 2M 10D to 2M 12D (you can see that in the route). A tight orbit around Mars goes by fast. The 6 km/s burn is partly an out-of-plane adjustment, and that needs to be where it is. |
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Post by jageriv on Jan 3, 2017 7:28:44 GMT
Duno, that ship looks a bit slow... actually that thing can do homecoming in 3mo min... damn, deceleration phase is too long UB MK4(Failure design) ...now were talkin! has a refueller and discarding fuel tanks, this thing can probably do homecoming even faster! Well, it will count once you run it through homecoming. Let us know how well it can do it. It does look promising, but, like I said, until you do homecoming, we can't really tell how well it will actually do. |
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Post by lawson on Feb 3, 2017 8:54:28 GMT
Watch out Apophys! I finally made a ship with more acceleration AND more delta-V than your homecoming ship. I expect to be able to test it in a day or two.
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Post by lawson on Feb 4, 2017 5:02:39 GMT
Huh, drop tanks are BUGGY! So I made a ship that uses two types of reaction mass with drop-tanks to match thrust with the current weight while keeping power draw constant. Oh, god is it buggy! The RP-1 stage should start with 10mg of thrust with 126km/s delta-V, then the Hydrogen stage should start with 10mg of thrust and 344km/s of delta-v. BUT, I either get the 2x delta-V bug in the picture, or none of the stats even see the RP-1 stage... Actually flying it in a mission seems to be more accurate, but the delta-V display is still all over the map even with one MPD shut off. Just did a 2M 19D run, but I'm hesitant to try for faster with all the bugs! (need to boost the acceleration some more...) |
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Post by lawson on Feb 5, 2017 7:53:28 GMT
FINALLY! matched apophys's time!  Ship and final trajectory. Had to manually calculate the first two stages because using multiple types of reaction mass is rather buggy. Each stage has a mass fraction of about 2, and starts at 14mg. Looks like my staged burns get up to speed a little faster, but take longer to slow down. My average acceleration is slightly lower, but I have more delta-V. I think I might be able to knock 1-2 days off my time, but not today. |
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Post by apophys on Jun 10, 2017 0:15:32 GMT
Records are meant to be broken. Though I expect this new one will hold for a while.  I got to this point on basically the same base ship as my prior record. The biggest change was just giving it a custom-built 400 GW MPD instead of 4x 100 GW ones. The mass and cost went down due to less propellant being necessary (higher exhaust velocity). Trajectory: Top view, Mars reference point:  Ending maneuvers:  Ship: And here's the ship file, so you can poke around and/or try to beat my record with my own stuff. Homecoming 6.txt (19.21 KB) |
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siskinedge
New Member
Working on a All conventional guns single ship campaign run
Posts: 18
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Post by siskinedge on Sept 17, 2017 20:06:27 GMT
Records are good for breaking, this is my first single ship that managed to beat your current time for homecoming. the other attempt while faster took four ships, 3 of which slammed into mars. The ship is basically a ripoff of your last one but with a modified version of one of your reactors and more acceleration to get to full speed sooner.  Trajectory:   Ship:  Steam Workshop |
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Post by jtyotjotjipaefvj on Jul 31, 2018 11:29:24 GMT
I improved the previous record a little with a ship that's totally stock and only uses a small exploit* completely legit. It has high enough acceleration, so the only limit is the amount of dv you can cram into the cost and mass limits of the mission, and I think this ship is pretty high up there. Ship design:  Record:  Trajectory:  *The exploit used is the fact that you can power multiple MPDs with just a single thruster's worth of reactors in the orbit view. |
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Post by newageofpower on Jul 31, 2018 17:20:55 GMT
That's a pretty severe exploit. If I used 10x 100GW MPDs on a ship with only 1x 100 GW Reactor and Radiator mass... yeah.
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Post by jtyotjotjipaefvj on Jul 31, 2018 17:21:40 GMT
That's a pretty severe exploit. If I used 10x 100GW MPDs on a ship with only 1x 100 GW Reactor and Radiator mass... yeah. You're not thinking big enough. My ship has 15 TW worth of MPDs running on 100 GW power. |
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siskinedge
New Member
Working on a All conventional guns single ship campaign run
Posts: 18
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Post by siskinedge on Aug 5, 2018 14:48:23 GMT
And I felt like it was too cheaty to use refuel pumps with a fleet of ships to beat the mission.
This, Heinlein would be proud.
XD
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