[01:50:21] https://i.gyazo.com/5649848036d6747b864b8306c82d384d.png - It's ready for KerbalX I think. [03:52:43] Sons and daughters of Kerbin: Enemy Tsiolkovsky used ROCKET EQUATION! It was super effective! [03:55:07] Hey, a Bernal Sphere illustration I didn't have before! http://bisbos.com/images_stations/bernal1_1024.jpg [03:56:37] The solar panels don't rotate, I guess? [03:58:40] UmbralRaptor: I think they're actually radiators. [03:59:50] hrm [03:59:51] At least, the way they're depicted in that particular illustration. Whether or not the agri-habs and attending structures are monolithic with the central habitat or counter-rotating has never been clear. [04:03:22] In older concepts, such as the following, the radiators were more distinct if only because the Solar power plants predated modern photovoltaics http://ssi.org/wp-content/uploads/2016/11/ssinl_19921112_img09.jpg [04:04:12] Action: Scolar_Visari would actually gun for Solar thermal plants in lieu of finicky photovoltaics given the latter's issues with longevity in space environments. [04:09:36] Action: Scolar_Visari can't decide if Elite's star ports have photovoltaics for surplus energy or low capacity radiators https://forums.frontier.co.uk/attachment.php?attachmentid=90918&d=1451439920 [04:10:33] yet another rocket math problem, Supernovy and UmbralRaptor! Given Isp, starting mass and thrust, final mass, and a constant acceleration, what are the thrust and mass curves and, following, the burn time [04:11:03] I find two equations that seem to rely on one another [04:11:20] I mean, since proton chain fusion can be done with 2.5 metric ton reactors, I doubt there's much demand for photovoltaics on space stations that could easily tote reactors weighing more than entire battlecruisers. [04:11:21] hehe, differential equations [04:11:53] differential or implicit, maybe? [04:12:30] normally acceleration is exponential with constant thrust because of mass loss [04:12:30] F(t) = a M(t), M(t) = m0 - Ve*T/F(t) [04:12:33] burn time is easy [04:12:41] if i remember correctly [04:12:49] under constant acceleration is the thing, not constant thrust [04:12:57] yes, so you have to invert that [04:13:03] KwirkyJ: dv / acceleration [04:13:05] which would mean logarithmic [04:13:26] bit it was around 15 years ago :) [04:13:55] KwirkyJ: So you're throttling down? [04:14:02] correct [04:14:23] big picture being that the payload has a maximum tolerance [04:15:08] f/m = a, A would be a function of m. Hrm, exponentially decaying thrust? [04:15:18] Do we have a throttle range that goes from 0 - 100% ala KSP? [04:15:36] Action: UmbralRaptor assumes so. [04:15:47] UmbralRaptor: sounds right& (e^x is a thing) Scolar_Visari for simplicity, yes [04:15:50] Teehee https://forums.frontier.co.uk/attachment.php?attachmentid=109011&d=1458451093 [04:19:03] Huh, the Rocinante is tiny https://i.imgur.com/NIxthR4r.png [04:19:33] of course it is [04:20:02] but i think most scifi spaceships are too small [04:21:16] Althego: Something something Epstein drive. [04:21:36] I'm told the sense of scale in Elite's more obvious if you're using a headset. [04:21:45] which is a plot device never to be explained as admitted by the authors [04:23:18] Althego: It's the same fusion propulsion from Battletech I tells ya! [04:23:35] Althego: "The boldest of the officers resumed speaking. 'That one ship is ninety million miles long, Your Highness. It Shimmers like fire, but moves so fast that we cannot approach it. But it came into the center of our fleet almost touching our ships, stayed there for twenty or thirty thousandths of a second.' [04:26:07] KwirkyJ: m(t) = e^(-a*t/(Isp*g0)) [04:26:34] Even the smallest FTL capable ship in the game, the Faulcon-deLacy Sidewinder, could not fit in a three car garage https://i.ytimg.com/vi/W4bEQlVvUvI/maxresdefault.jpg [04:26:44] huh. Can you walk me through your derivation? [04:27:01] (let's simplify Isp*g0 to Ve?) [04:27:02] seems to be ok [04:27:03] Actually a better picture http://i.imgur.com/X5siNxs.png [04:28:11] https://photos.app.goo.gl/quYKafYHS9zNhd0C3 [04:28:34] thanks [04:29:08] Action: Scolar_Visari still shudders to think of someone living in a Sidewinder and spending months in deep space. [04:29:09] KwirkyJ: log(mass/mass_dry) * Ve - time * accel = log(mass_at_point/mass_dry) * Ve [04:29:18] KwirkyJ: alternatively, this [04:31:45] ;choose Elite:Stellaris [04:31:49] Drats. [04:33:41] Oh, and I actually have space news for today: Dream Chaser is cleared for a 2020 rendezvous with the Space Station http://spacenews.com/sierra-nevada-gets-nasa-approval-for-first-dream-chaser-iss-cargo-mission/ [04:35:32] Yay [04:36:05] Huzzah for the Atlas 552? [04:36:47] Though the CST-100 should get the first twin engined upper staged Atlas V well before that. [04:38:08] bleh, had some problems with Lubuntu so I'm trying Xubuntu now. [04:38:15] Hopefully before the year's end. [04:44:22] UmbralRaptor: took me a while, but I think I can follow what you're doing. Just not clear how your m1 = m0 * e(-at/Ve) resolves to the clear-cut function [04:45:07] What ?"Better to get NASA out of Commercial Crew's way, as the IG found it to be. NASA is the origin of the delays in Commercial crew." [04:45:32] er, clear-cut function? [04:45:33] Action: Scolar_Visari ponders if quoted commenter was aware of NASA not being given the commercial crew budget they asked for. [04:46:05] the m(t) = e^(-at/Ve) you offered [04:47:10] ah [04:50:45] a = F/m = dm/dt * Ve/m [04:52:13] er, note dm/dt is negative. Hence the negative sign in my notes. [04:52:52] dm/dt being m-dot, yes? [04:53:01] yeah [04:53:07] rearranging: -a*Ve*dt = dm/m [04:54:53] Maybe Space Station beyond 2024? http://spacenews.com/space-station-supporters-prepare-for-budget-battle/ [04:55:39] you're sure of that rearrangement? [04:55:50] oh no, not this guy [04:56:39] Action: Scolar_Visari is amused Ted Cruz is for a lengthened program. [04:56:48] a = dm/dt * Ve/m = dm * Ve / (dt * m)? a * dt * m = dm * Ve? [04:57:15] (with dm being minus, I guess) [04:57:16] To be frank, it only appears that the administration is behind the proposed cancelation plan. [04:57:54] Action: Scolar_Visari mutters something about a return to the Moon ala Constellation 2.0 would require a significant budget increase and/or budget cuts to all other programs ala Augustine's report. [04:58:39] KwirkyJ: well, I want the dm and m on the same side for integration purposes. [04:59:25] so it would be -a*dt/Ve = dm/m ? [04:59:50] Action: Scolar_Visari can also not see a serious budget increase ocurring in the near future given recent fiscal events. [04:59:56] doh, yes [05:00:16] Action: UmbralRaptor is not immune to algebra errors. [05:00:22] so say we all [05:01:30] Oh dear. "The soviet Union launched the engeria rocket back in 1987, the american media @ the time reported the launch as just a test launch, but turned out to be some kind of laser weapon. That same rocket launched the Soviet equivalent of the space shuttle a year later. It was even rumored to have the capability to go right to Mars." [05:01:42] note, that's what you had in your notes screenshot, I observe [05:01:57] Buran go to Mars! [05:02:05] <_<;; [05:02:53] Amusingly, they're not completely wrong if you remove Buran from the picture. NASA had, in DRA 3.0, proposed the use of Energia LVs for launching test articles to LEO. [05:03:27] With some austerity, it wouldn't have been compeltely impossible to use Energia for a Mars mission. [05:04:30] UmbralRaptor: so then you integrated...? [05:05:56] yeah [05:05:59] both sides with respective domains, to get& = -a*t/Ve [05:06:39] ah, that's where you got ln(m1/m0)? [05:06:56] (I re-derived it from the rocket equation, after I saw it in your notes) [05:07:12] ln(m) = -a*t/Ve, evaluated from m0 to m1 and t0 to t1. [05:07:19] mhm [05:07:37] (t0 = 0 whenever practical) [05:08:06] yeah, it's definitely related. [05:08:31] leading to m1 = m0 * e^(-at/Ve). got there... [05:08:53] above is true if t := t1? [05:09:15] thus m(t) ?= m0 * e^(...) [05:09:50] yep! [05:10:02] kk. so your first listing was missing m0 [05:11:20] thank you for your help! [05:11:38] Note to self: be careful when doing algebra when half asleep [05:11:44] np [05:12:07] I completely forgot to associate the rocket equation with this problem. dV remains constant, silly dragon [05:13:34] Aha, a picture of the proposed Energia concept for DRA 3.0! https://snag.gy/B6UVHR.jpg [05:14:02] Action: Scolar_Visari notes the payloads is not mounted upside down this time! [05:14:46] Presumably they had tine to test things also. [05:14:55] *time [05:15:46] Install sensors right-side-up. [05:16:16] Insure programmers realize payload is right-side-up. [05:16:51] Though the Energia proposal, even in 1997, was far too optimistic. [05:16:55] Also that 180`360 [05:18:24] what were those big chunky looking panels on energia's boosters for anyway [05:23:14] tawny: I cannot find an immediate answer, though it seems like they may have involved some sort of booster recovery regime that was never attempted in real life http://www.buran.fr/energia/img/blocA-en.jpg [05:23:39] oh, neat [05:23:42] thanks for the answer! [05:26:17] Yep, reuse http://www.buran-energia.com/energia/energia-desc.php [05:26:51] And more at http://www.buran-energia.com/energia/energia-consti-1eretage.php [05:27:54] Action: Scolar_Visari cannot imagine the booster landing being terribly healthy. [05:31:42] SpaceX had tried parachutes on the first couple of Falcon 9 launches. They did not end well. [05:34:32] Action: Scolar_Visari goes off to add wings to Falcon 9s. [05:38:24] I've been out of the loop--what happened to the central rocket during the Heavy launch? [05:38:36] i.e., why did its recovery fail? [05:39:27] it didn't have enough igniter (TEA-TEB) for relighting the engines [05:39:31] and so only one was able to light [05:39:50] ah [05:39:59] I think I'd heard it spent a little longer than expected in vacuum and that caused it to boil off a little too much [05:52:22] what is high above the mun altitude? [05:52:35] check the wiki? [06:11:21] check yo stagin [11:58:29] Damm, people just keep calling me OP instead of Gurren! [12:03:35] Hello? [12:03:42] Anyone here? [12:04:05] nope, nobody here [12:04:16] Only us [12:04:22] and meee [12:04:27] Yes, OP, I am here [12:05:42] https://youtu.be/_kd64VE3A1c?t=20m48s [12:05:42] YouTube - Hovering a rocket - SpaceX model [12:06:18] I posted a simulation of Duna-stationary sattelites, and EVERYONE thought i was using Principia... When i actually used Universe Sandbox² [12:06:36] BUT WH [12:06:47] WHY* [12:08:22] *facepalm* the reddit curse reached here [12:09:04] And why is this quiet [12:09:15] like, ALWAYS [12:09:19] hehe no [12:09:22] How can the adobe update/installer software be so abysmal? [12:09:32] there is usually something going on here [12:10:47] But when i arrive, POOF silence [12:10:58] Also why does it need to restart explorer [12:11:06] Why is adobe so terribad [12:11:19] adobe flash? [12:11:27] Adobe Creative Cloud in this case [12:11:34] 494 Little Green People orbiting in Reddit, but 5 here [12:11:36] But all of adobe's software installers tend to be horrible in my experience [12:11:48] US2 is great [12:11:52] I think the only thing I like about Adobe flash is it's uninstall GUI haha [12:12:22] I dunno about Adobe's other stuff [12:12:34] I posted a simulation of Duna-stationary sattelites, and EVERYONE thought i was using Principia... BUT WHY [12:12:47] i actually used Universe Sandbox² [12:12:55] Adobe CC is their centralized installation/update thing for their CC suite (subscription model) software [12:13:14] In my case lightroom and photoshop [12:13:22] And flipping Principia was involved in the chat [12:14:31] Everyone: Adobe is terrible - Me: Universe Sandbox and Principia [12:14:49] why nobody talks with me [12:16:49] https://www.reddit.com/r/KerbalSpaceProgram/comments/7weaa0/dunageostationary_sattelites_arent_stable/ JUST LOOK AT THE CHAT [12:17:04] PRINCIPIA IS EVERYWHERE [12:18:57] DAAMMM [12:19:00] HALP [12:19:13] THIS IS COMPLETE SILENCE [12:19:15] WHY [12:21:49] because i am playing the game [12:22:24] my pc is terrible [12:24:57] hi [12:25:30] GurrenLagannCWP, use irc mod [12:25:59] irc mod [12:26:16] there is a mod for in-game IRCing [12:27:06] IRCing [12:27:16] how do i use it [12:27:31] idk lol, it was just a suggestion [12:30:14] Damm [12:30:47] restarting [12:31:25] good [12:34:09] use a bnc or a screen(1) :) [12:34:47] HOW [12:36:04] I just simulated that asteroids have no effect on Kerbin [12:37:01] But Gilly has [12:37:51] asteroids are parts, not planets in the game, they have no gravity [12:40:38] they can be mined though [12:40:53] stock asteroids don't have enough mass to have an SoI even out by eeloo :P [12:40:59] and planets are indestructible objects on rails anyway [12:41:10] at least in stock [12:46:53] On US2 that is [12:48:33] I also simulated on US2 that asteroids have 0 chance of hitting kerbin [12:48:51] IN 7 YEARS [12:49:00] EARTH YEARS [12:49:34] what, some of them do hit it [12:50:18] 1 asteroid, i'm still simulating 35 asteroids [12:50:49] 1 hit [12:51:04] 1 capture [12:51:24] 3 captures [12:51:52] captures are usually due to warp induced SoI transition errors [12:51:54] 1 stable capture [12:52:14] (SoI transition autocorrect happens only when the vessel has patched conics enabled) [12:52:15] but werent those fixed in 1.3? [12:52:19] or 1.2? i dont remember [12:52:25] (might even be only the the active vessel) [12:52:25] or was that just for ships? [12:52:28] I'M SIMULATING IN UNIVERSE SANDBOX DAMMIT [12:52:34] hehe [12:52:41] doesnt matter then [12:52:49] because the ksp physics are different [12:52:54] no multi body gravity [12:52:55] Althego: patched conics are required to detect the SoI transition well enough [12:52:58] 1 close encounter [12:54:14] I'm simulating in a realistic simulator, i'm assumming that KSP exists [12:54:45] GurrenLagannCWP: missed that initially, sorry [12:54:48] distant period [12:54:54] NP [12:55:03] watch that fine control ;) [12:55:05] Mistakes happen [12:55:18] how do you know what orbits asteroids have in ksp? [12:55:32] how do y ou know that in your other simulated universe they are the same [12:55:50] Althego: save file parsing is one way [12:56:20] I randomly place asteroids, so that saves 5 hours [12:56:36] so you already have a deviation [12:56:38] Dangerous encounter [12:56:41] Yep [12:57:26] 100 asteroids lags my pc [12:57:59] aaargh [12:58:27] stack overflow exceptions should be renamed to avoid google naming conflicts with a certain website [12:59:03] Encounter [13:00:34] 2 asteroids pass 86,500 km away from eachother, orbits pertuberd [13:01:32] perturbed* [13:03:19] 2 dangerous encounters [13:03:20] no, the website should be renamed [13:03:29] stack overflows existed long before the website [13:04:49] Kerbin has a Quasi-sattelite [13:05:15] minmus? [13:05:27] SOO MANY CLOSE ENCOUNTERS [13:05:39] Nah, not minmus [13:06:06] another asteroid 1.5 Gm away [13:08:19] 11 years - 1 impact [13:08:50] to be fair kerbin is really tiny compared to normal planets [13:09:15] Twin dangerous encounter [13:09:29] Asteroids are scaled too [13:09:37] 50m at max [13:09:54] 2016 HO3 is my template [13:10:31] 16,000 km encounter [13:11:17] what would a counter experiment with earth show? [13:14:28] Mun and Minmus added [13:16:00] Minmus escaped [13:16:04] hehe [13:19:26] almost a impact [13:21:36] CLOSER THAN THE MUN [13:25:47] 12.8 years [13:28:28] IMPACT!!! [13:28:47] 13.1 YEARS [13:29:45] Althego: IMPACT [13:30:07] Capture [13:34:13] 14 YEARS [13:36:07] 13.5 YEARS, WE GOT A IMPACT - 3 total [13:38:24] .... [13:42:22] deciide [13:45:27] I will run up to 20 years [13:48:47] IMPACT [13:48:56] RIP KSC [13:52:07] I will stop now [15:09:00] ;8ball Simulate KSP in MERCURY6? [15:09:00] UmbralRaptor: Yes [15:50:34] But Mercury is toxic. Why would you want to simulated anything in there? [15:53:52] because FORTRAN, [15:54:39] hehehe [15:54:53] do it in pure asm :) [16:16:00] I'm still wondering what I should do with my old stations around Minmus and Lerbin now that I have access to the bigger docking Konstruction ports [16:16:53] Minmus, Mun and Kerbin* [16:19:43] let the stations hit the floor, let the station hit the floor [16:21:00] I might just Contruct the new station docked to the old one so I can re-use the supplies before deorbit [16:49:25] ROFL someone did it. [16:49:28] https://kerbalx.com/Thadious/Roadster-for-Falcon-Heavy [16:50:02] hehe [16:50:09] is there a trailer for 1.4? [16:50:18] now that there is an announced date [16:52:31] 1.4 is coming out?\ [16:52:38] what are we getting this time? [16:53:06] it has to, the expansion needs it. in fact some of the new parts are in 1.4 and the expansion just uses them [16:54:06] no trailer sadly [17:02:29] I sorta binge-downloaded stuff on KerbalX....heh [17:53:28] Please Hold. Your IRC is important to us. All of our users are currently Away from Keyboard. You comments will be read as soon as one of our users is available. [17:54:56] lol [17:55:41] I'm calling my for my car insurance... Can you tell? [17:57:54] If I had a $ for every typo I did on IRC... [18:04:28] ve2dmn: Not really because too many large orgs have the exact same message. [18:11:47] I'm an idiot. I didn't put any winter tires on my car, so I put it in storage [18:11:57] but I didn't tell the insurance :/ [18:12:58] i shot the sheriff but i didnt tell the insurance [18:17:01] so there is going to be a 1.4 version. [18:17:34] tbh I'm slightly annoyed -- means I'll have to wait to use the DLC in a modded game [19:16:42] Pakaran: it's true of every gmae, unless the mods get included in the base game [19:17:06] What's KSP 1.4 going to beE? [19:17:13] That's *not* the expansion, is it? [19:17:19] I figured the expansion was like an official mod. [19:18:01] howdy [19:21:32] Does Mechjeb automatically adjust the accent profile of a rocket depending on what it looks like? My settings keep changing on me. [19:22:04] Ascent rather oops. [19:23:07] I don't know, but that's an interesting question. I haven't looked at the code for MJ's ascent in a while. I do know GravityTurn does automatically adjust its parameters on successive runs of crafts with the same name. [19:23:15] That's bitten me when I've made significant changes without renaming. :-) [19:25:52] 1.4 besides some bugfixes we will get new unity a nd some new 1.875 m parts [19:26:32] same name, tough luck with everything called untitled spacecraft [19:26:43] at least run a hash on the file or something [19:28:37] https://www.youtube.com/watch?v=IcLZqpB_QPg [19:28:37] YouTube - 6 Weird Units of Measurement We're Still Using for Some Reason [19:30:10] The TL;DR : Furlong, Barleycorn, Micromort, Jiffy, Banana Equivalent Dose, Barn [19:31:07] And Smoot [19:32:37] Smoot's a little different. (I worked for son-of-Smoot) [19:32:58] Barn is actively used by nuclear scientists, Smoot's only used by the Cambridge police department. [19:40:01] ah the smoots [19:40:13] i saw that in something [19:40:16] maybe numberphile [19:40:28] no, standupmaths [19:40:37] but the same guy appears in numberphile sometimes [19:40:44] Althego: same difference [19:41:00] He ends up working for the NBS which I find interesting. [19:44:01] Mathuin: the National Ballet School? [19:44:15] i thought jiffies are kernel tiem units [19:44:36] https://elinux.org/Kernel_Timer_Systems [19:44:45] it is more often used there than what the video says [19:45:09] finally she got to processors [19:48:45] ConductingCat: thanks for reminding me that it's been a while since I watched Crash Course [19:49:56] In this spirit, I would like to thank the industrial revolution for giving us... everything [19:54:58] including modern medecine (which I have to thank to be alive), computers, and ultimatly KSP [19:55:14] And rockets. tasty tasty rockets [19:57:31] Boosters, struts, and ulcers [19:58:48] https://www.youtube.com/watch?v=-scs_yF59YE [19:58:48] YouTube - The bridge which is measured in smoots [20:55:40] #KSPOfficial: mode change '+o Supernovy' by ChanServ!ChanServ@services.esper.net [21:12:08] God of war to do battle with its rival tonight: http://www.astronomy.com/observing/sky-this-week/2018/02/the-sky-this-week-for-february-9-to-18 [21:14:57] Mars vs ? [21:16:54] Antares [21:19:57] https://pbs.twimg.com/media/DVackr5WkAARHSB.jpg:large [21:29:03] 2018, the year of the flying car. [21:30:17] not mass produced [21:30:38] also car crashes from above would be dangerous [21:33:39] UmbralRaptor: 2018, the year of the *space* car [21:39:35] but yeah, I might just use the expansion in a stock game to try it out. I'm definitely geting it. [21:43:45] same [21:44:06] was there a forum nuke that wiped users within the last few years? it doesn't recognize any of my emails [21:57:46] It's just that I'd almost certainly have fewer parts than I currently do, frankly [22:13:05] why is my screen such a moron [22:13:16] I have to heat it sometimes or it won't turn on [22:15:51] I believe LCDs don't function very well below 50 farfenlugenheight or something [22:16:10] actually I think it's the power supply that doesn't want to work [22:16:26] like the lil led turns off for a moment when I press the button when it is too cold [22:16:39] so I guess some capacitor is too cold to work properly or somethingh [22:20:02] or it could be physically damaged if you repeatedly powered it on in 20 degree temperatures or something. due to the large thermal difference of the components [22:20:15] i know BGA chips hate large temperature fluctuations [22:20:19] maybe [22:20:35] my other screen is like 5 years older and it works fine however [22:21:19] well, check the documentation for the proper operating temperature range. [22:42:49] Is it safe to move ships between saves while at the main menu? Or do you need to exit completely? [22:43:01] it is safe [22:49:48] I thought fusion wasn't a net energy gain yet. [22:50:16] Did they fix that? [22:50:22] I guess [22:50:39] they did manage to get some power from fusion in short tries [22:50:51] and there are sevaral reactor being built made to produce power [22:51:47] I'm not sure ITER+DEMO+PROTO counts as "several" [22:52:35] it's more than one [22:54:38] deuterium and lithium is kinda cheating for fusion. I'm still waiting for hydrogen hydrogen fusion. [22:55:58] go tell them then [22:56:10] im sure they would love to hear how to improve their design [22:56:15] I'm not going to get in the way of baby steps. [22:56:19] But I'm still waiting. [22:56:45] Blaank: at solar core conditions (15 million Kelvin, and densities so high that electron degeneracy is a modest factor), the mean lifetime of a proton is in the gigayear range. [22:58:12] Unless you meant deuterium-tritium? [22:59:07] I'm watching a linus tech tips on nuclear fusion reactor. [23:01:24] Seems to just be more testing. [23:01:47] Which is neat and all but isn't a working net energy gain and cost effective nuclear fusion reaction. [23:01:58] alright I need to order batteries for my heli [23:02:12] Linus loves his props. [23:13:57] thanks Fluburtur, sorry, was in another window. [23:18:42] Apparently, my Dragon SSTO is a HUGE hit on Kerbalx [23:27:53] good [23:27:59] ordered a battery for my heli [23:41:41] wait, does distant object enhancement work on the main menu? [23:41:49] Because I swear I saw a gas giant moon fly by.