[22:09:27] NASSP Logging has been started by thymo [22:10:20] Alright logging is back up. Did some power cable reorganizing today. :) [22:10:30] LM EPS needs help Thymo :P [22:10:42] What's up? :) [22:11:08] Well I have a running list actually, but right now the more pressing matter is CSM power transfer to the LM for TLC [22:11:15] Not functioning properly [22:11:36] I left 2 issues on git about the EPS [22:12:05] Ehh, I'll try to help. Power transfer is the one thing about the CM EPS I haven't really looked at thoroughly. [22:13:16] So if I read this correctly power transfer is completely broken? [22:13:27] I'm pretty sure it used to work a while back. [22:14:29] Yeah it did [22:15:08] Hmm. I'm in the process of updating my local repo anyway I'll take a peek. [22:15:21] I cannot get it to work at all, I sometimes get an overcurrent transient that pops the CSM LM PWR breakers, and with a debug script watching my heaters in the LM, they dont turn on unless that switch is flipped to reset [22:16:06] My first clue was the systems test meter not showing anything, and I thought that was working so I started looking to see if I had power at all and I dont, my LM batteries are slightly drained and none of my heaters are running on CSM PWR [22:24:00] Just looking through the commit history. CSM-LM current measurement wasn't added until Jan 12th. [22:26:31] Niklas said it was working, said it could possibly be a bug from moving stuff to pre step [22:27:11] My repo is still back in early January. I'll test if it works there. [22:27:27] Also check and see if you can do the following: [22:28:08] Eject the LM, start CSM pwr to the lm, reset/off csm lm pwer, and go into the LM and try to turn on the batteries after the disp and des eca cont breakers are closed [22:28:19] Right now we have an issue where that only works after a save and reload [22:29:01] Err, Orbiter Beta. I forgot to install DX9 when I set it up. Sec [22:37:11] rcflyinghokie: What version of DX9 is current? Codeplex has shutdown and the new site has multiple options. [22:37:26] Let me look and see what I have in [22:38:15] https://www.dropbox.com/s/c475j3rgj651f9v/D3D9ClientBeta25.3-forBETA%20r70%28r908%29.zip?dl=0 [22:38:27] Pretty sure that is it [22:39:40] Okay, looks like there is a later release then at that site (r914) I'll take that one. [22:41:26] Oh interesting [22:43:22] Where did you find it? [22:43:50] https://www.orbiter-forum.com/showthread.php?t=18431 [22:43:59] Has a link to https://www.tuttovola.org/index.php?PHPSESSID=hl0clhtrm2tli3dscnh25b8ts3&action=downloads;cat=64 [22:44:40] Having some issues though. Earth is now a giant sea. There is no land. [22:46:27] Oh that happens to me [22:46:31] It takes some time [22:46:43] It is weird [22:46:54] It eventually "recedes" and reveals the cape [22:53:55] Oh hey now. Hit an assertion. [22:56:50] What? [22:57:09] Orbiter crashed due to some assertion, [22:57:25] Maybe it doesnt like that DX client? [22:57:51] In isatty. Some Microsoft function called deeply nested in LEM::Init [22:58:10] Retrying fixed it. *shrug* [22:59:08] Interesting [22:59:17] You also probably have old scn's [22:59:38] A lot has been changed in the CSM and LM systems that save in the scn [23:01:25] Hmm the assertion hits fails again when I load a PDI scn. [23:01:49] Want to try one of my scns? [23:02:02] It might be an issue of stuff saved in old scns not in play anymore [23:02:10] My source is still old so that might break even more. [23:02:16] Oh thats right [23:02:21] You are trying an old source [23:27:47] Looks like I don't have my scenario's with a docked stack anymore. [23:29:53] I have some older ones [23:30:00] I think they should work [23:31:08] I'll update and debug from there. [23:31:22] This is from october, so before the major ecs changes [23:31:23] https://www.dropbox.com/s/n5cq1dbzhve4noo/Apollo%2011%20AGS%20Testing.scn?dl=0 [23:31:31] I think thats a stack in lunar orbit [23:32:13] I do have Apollo 9 in orbit. I just need to do TP&D. [23:32:45] That might be better [23:32:48] Fresh LM [23:36:26] I'll do that tomorrow though. Otherwise I'll be sitting here running checklists until 2AM. :P [23:37:07] .in 12h You should really update your HTTPS certificate. [23:39:54] Alright. I'll be back tomorrow. [23:40:39] Take care [11:37:47] I agree [13:22:36] Thanks Guenter. [13:24:34] hey [13:24:54] hey Alex [13:25:00] Hey [13:25:06] and Thymo [13:25:21] I'm changing the RTCC to not ask for the thrust parameters from the Orbiter API [13:25:53] was just working on the Apollo 10 MCC and it used the S-IVB thrust for the TLI+90 abort calculation [13:26:00] so I have to change that anyway [13:26:46] yeah, a good solution in the long run I think [13:27:37] if we use mission specific thrust and ISP values then the MCC/RTCC should have them separately saved in the launch scenario [13:27:42] as would the real RTCC [13:28:03] there might have been an update with the actual performance during the flight [13:28:26] but for the most part they just have the thrust parameters stored preflight [13:34:15] I guess that will work to with say trying to calculate the evasive maneuver before LM ejection from the SIVB on Apollo 11 [13:35:13] or before CSM separation rather [13:35:55] yes, although both thrust parameters and mass have to be right for that [13:36:17] mass is also from the Orbiter API usually [13:36:22] as well as the mass of a docked vessel [13:36:52] ah, right [13:37:32] and with this change now of course, all the saturn main engines can be changed to user defined [13:37:59] I wonder if anything else tries to access default engines [13:39:00] probably a few more things [13:42:26] I've been testing with all my engines set to user-defined on my local copy and so far so good. I've temporarily made a "dummy" engine on the SIVB, which is set to default, but has no fuel, just to keep RTCC MFD happy [13:43:19] i will search through all our code, if anything is accessing the Orbiter defined engines (main and hover) [13:44:47] still will be a lot [13:45:07] this is not a thing that can be solved in the next few days [13:45:25] you might be getting good results, but I am certain in some mission phase it still leads to bad issues [13:47:36] yeah, fair enough :) No rush need for this [13:59:12] I'm already deleting most of the THGROUP_MAIN and THGROUP_HOVER with this RTCC change for the TLI+90 PAD [13:59:37] but not all of them [13:59:47] S-IVB burn simulation will have to be handled separately [14:02:32] I only noticed the issue for the TLI+90 because I had the impulsive TIG fixed at 4 hours and the non-impulsive TIG was 3:59ish [14:02:45] the Maneuver PAD did the calculation right, burn time was close to 8 minutes [14:03:33] now I get nearly the same TIG as during the actual mission [14:19:20] awesome [14:31:07] can the RTCC MFD do that calculation, before TLI? [14:31:29] I guess it would need to get the TLI data from the LVDC, 1st [14:32:16] which calculation? [14:32:26] TLI+90 [14:32:41] no, the MFD can't do that right now [14:33:06] difficult to implement [14:33:40] and even the RTCC for the MCC doesn't do it very well. The post TLI state vector from the TLI simulation that the RTCC does is not perfect [14:33:41] yeah, not too important as we can always make the calculation after TLI [14:33:57] one of the few MCC only features of the RTCC right now [14:34:15] PADs have all calculated right now, so on to TLI [14:34:30] nice [14:34:52] of course I still need to do the right TLI simulation with the PU shift [14:34:59] burn time is still off [14:35:10] I think those are the only presettings I did not test yet [14:35:43] those are the only presettings that I tested [14:36:06] haha [14:36:20] we got it covered then [14:36:24] yep [14:36:27] it worked ok [14:39:43] I did a test yesterday with only on-time launch, 1st opportunity presettings (Apollo 13). I wanted to see if I can fly a second opportunity with a 7-parameter update with RTCC MFD, worked very well [14:41:51] After TLI, I added 1:30 to the pericynthion time, landing time (for the extra orbit). So that all worked good too with no other changes to mission constants [14:42:55] good to know [14:43:18] That mission had a fixed TLC time I think so I guess I would of needed a clock update [14:43:35] I'm not sure [14:44:00] I think I remember reading some things about Apollo 14 requiring flexible flight planning [14:44:08] yeah [14:44:21] more flexible than previous missions [14:44:42] mostly because the launch day wasn't really clear due to the CSM and other changes [14:45:00] So on those missions, you subtract the extra orbit (or whatever delay) to maintain the same TOA [14:45:06] during that time they came up with the concept of just sticking to the flight plan and changing the mission time [14:45:56] so I'm not sure if there would have been a clock update on 13 [14:46:32] right [14:47:22] would have required a lot of flight plan changes [14:49:11] and I guess a 2nd opportunity TLI is not the same as a pre-launch delay as it doesn't affect the MET start time [14:50:23] yep [14:51:25] so launch on time, 2nd TLI opportunity, Apollo 14 and later. That wouldn't require a clock update either, because both in MET and GMT the arrival time at the Moon is the same, right? [14:51:34] yes [14:52:15] and that would all work right in NASSP to I think [14:54:28] Apollo 8, 10-13, the peri arrival time is automatically adjusted forward 1:30 or the extra earth orbit [14:55:39] oh, did you ever figure out the CTD you had after insertion? [14:56:03] hmm I think I did [14:56:41] I got in the bad habit of waiting until 5 min before launch before pushing in the CMC breakers [14:56:50] that way I could time accel 100x until then [14:57:13] That may or may not be it, but it seem to only happen when I did that [14:58:08] hmm, interesting [14:58:20] i'll have to test more on that [14:58:54] it seemed to be something at 18-19 mins into the flight. it would not happen if I stayed at 1x through that time [14:59:51] but if I time acceled through about 18 minutes, I got the CTD. If I waited until say 20 mins, then time accel, no problem. [15:00:19] Also I sometimes get weird fps dropping [15:08:44] always fun watching the S-IVB maneuver to the sep attitude, outside view, global frame camera track [15:16:44] nice [15:32:53] ok, now I have to fix the evasive maneuver [15:36:47] Good morning [15:36:53] hey [15:37:56] hey Ryan [15:38:16] Did you get my message, Niklas? [15:38:18] I'm testing what I did with the Apollo 10 MCC so far and when I have finished that I'll dive deep into all our LM EPS issues [15:38:38] it's a few things by now [15:38:39] Great [15:38:43] CSM to LM, ECA etc. [15:38:51] "double volume,isol=0;" [15:38:53] Yes [15:38:57] I didn't understand your issue with this [15:39:12] that's the same as writing [15:39:14] double volume; [15:39:18] double isol = 0; [15:39:27] Ohh [15:39:37] I thought iso was supposed to be its own line [15:39:43] I see [15:39:54] nah, you have a few option with that in C++ [15:40:06] I was looking into tank isolation more last nigh and that caught my eye [15:40:09] But that makes sense [15:42:25] Well time to get Eagle on the moon and keep testing this ECS [15:42:57] time to get Snoopy at least TO the moon [15:43:26] remember the LR issue on Apollo 10? [15:43:35] that it basically returned nonsense to the LGC [15:43:41] or the LGC couldn't deal with it [15:43:58] I wonder if the flag causing the 522 alarms could be responsible for it [15:44:26] I'm sure we use a similar procedure on 10 as we did on 11 [15:45:06] so if the LR is in a different position than the LGC thinks [15:45:16] and there maybe is no check for that in Luminary069 [15:45:32] well, we can try to figure it out again when I get there with the MCC [15:47:13] Interesting [15:47:33] I never thought about that connection [15:47:52] just a theory [15:48:01] could be the padload, could be a procedure [15:49:30] Hmm I keep getting tracker lights when trying this first undocked RR test [15:49:59] And 1210 alarms [15:51:56] where is that in the procedures? [15:52:07] The test? [15:52:29] yes [15:52:44] Its actually a manual lock on with V63 not a test, bad phrasing on my part [15:52:56] But V63 is generating the alarms [15:53:31] And I cannot seem to be able to drive the RR using V41 N72 [15:53:53] LM Timeline Book? [15:54:00] just before the flag reset? [15:54:42] no [15:56:51] After sep [15:58:12] so all you did there was V63? [15:58:15] no P20 [15:58:18] Yeah [15:58:24] But a V56 just fixed it [15:58:38] I am pretty sure I didnt go into P20 in the LM, only the CM [15:58:59] V56 fixed it, that's really weird [15:59:43] must be more flag salad [15:59:50] now we need the activation checklist :D [16:00:04] Yeah seriously [16:00:42] If P20 was running then that explains the 1210 [16:01:09] V56 indeed does a bunch of stuff with flags [16:01:23] indy91, are you going to try and land Snoopy? :D [16:01:31] I have already done that [16:01:40] well [16:01:45] iirc P63 worked great [16:01:51] and P64 not so much [16:02:08] P71 also worked fine [16:04:09] rcflyinghokie, P20 or P25 don't have to be running, but maybe it's just another flag being wrong, one that gets reset by V56 [16:04:29] Could be the landing radar stuff done right before [16:05:34] maybe you forgot a V34 or so [16:06:37] ok, issue with the evasive Maneuver PAD solved [16:06:52] the function asking the mass from a docked vessel now checks if the docked vessel is a S-IVB [16:07:06] if yes, it call a payload mass function I added [16:07:41] and that's something the S-IVB always need to keep track off, for its own mass [16:23:54] Hmm I still have 2 names in here [16:24:26] not even 3, weak [16:26:46] Haha [16:27:10] There [16:27:26] Ok lets see how the flag salad came to be [16:32:25] Hmm so the V63 in the timeline just says V63 [16:32:31] It never says to PRO or anything [16:32:36] yes [16:32:52] Is that implicit that you do or omitted by design [16:33:03] you shouldn't do that there I think [16:33:18] a change for the Apollo 10 checklist, there was no uplink for the evasive maneuver [16:33:19] So leave it on the F 4 12 [16:33:31] Ok [16:33:32] I guess [16:33:48] I will see if that solves the flag problem [16:33:49] you first have to input the option code in V63, right? [16:33:53] No [16:33:56] It just says V63 [16:34:00] Thats my question [16:34:23] and my question is about V63 as well [16:34:32] is that the first thing that appears in V63? [16:34:52] I was too lazy looking it up, haha [16:35:07] Yes [16:35:12] Sorry misread [16:35:19] With 4 and 1 in R1 and 2 [16:35:41] well, which option did you use? [16:35:45] LR or RR? [16:35:54] but I think both are wrong [16:36:26] if the procedure doesn't say which one, then you should stay in F 04 12 [16:37:39] Yeah thats what I was thinking [16:37:50] but it causes a prog alarm when I switch to slew for a manual lock on [16:38:57] which one? [16:39:20] 1210 [16:40:17] Hm it didnt this time [16:40:30] which option code did you use last time? [16:40:38] option 1 [16:40:47] This time I am staying in F 04 12 [16:40:54] No alarm [16:41:12] I guess it wants me to lock on first [16:41:18] from the code: [16:41:20] "VB63 SAMPLE RADAR ONCE PER SECOND" [16:41:29] so that's why you start V63 [16:41:34] Ah [16:41:41] because then the LGC talks to the radar(s) [16:42:29] and the very first line of code in V63 (R04) is also fun [16:42:34] TC RDRUSECK # TRY TO AVOID THE 1210. [16:42:41] Haha [16:42:48] Well there ya go [16:43:16] looks like a lot of interesting things already happen in V63 without entering an option code [16:43:29] so that's the right procedure then [16:43:30] No wonder it's left there [16:43:44] Yeah it works fine, I incorrectly assumed pressing on with the normal V63 rdr stuff [16:46:10] not always easy to tell if a procedure is actually 100% step by step or not [16:46:20] Right [16:46:26] There are a few implicit steps [16:46:41] But that one seems to be verbatim [16:47:38] Let me know if there are any other Apollo 10 Checklist/MCC conflicts I will fix them on the fly [16:47:50] I took care of the uplink leaving it just copy the pad [16:48:11] yeah, that is done before LM ejection [16:48:30] and the calculation will now use the right LM mass, even on the RTCC MFD [16:51:04] Great that was a pain before [17:08:08] Hmm [17:08:15] I got a 1706 calling P40 [17:08:30] But I certainly am not staged [17:09:13] Ah dap load [17:20:23] So far everything has worked well with this timeline [17:21:22] water qty light comes on every time I load though :P [17:22:03] But so far the ECS looks good as well, heaters look good (other than the quads which arent implemented yet) [17:22:44] And even the o2 consumption is on par with how much was expected around DOI [17:50:45] This is great even the angles in the timeline are perfect for say a P52 [17:50:51] Within a degree [17:54:02] of course they are :D [17:54:40] the REFSMMAT will also be almost exactly identical to the real mission [17:54:42] that helps [17:59:42] It's been a bit since I have done a landing without an abort test of some sort [18:00:56] What are the keyboard commands for doing ROD commands and LPD commands? [18:01:48] LPD commands are simply pitch and roll on the ACA [18:02:03] works on keyboard and joystick [18:02:22] and ROD is [18:02:36] researches how a QWERTY keyboard works. [18:02:46] plus and equals [18:02:52] no [18:03:15] minus and equals [18:03:31] not on the numpad [18:03:31] on the normal keyboard, not numpad [18:03:33] ok [18:03:35] thanks [18:03:48] - is down i assume? [18:03:51] minus is "DescendMinus", = is "DescendPlus" [18:04:11] Ok so minus decreases the ROD [18:04:18] yes [18:04:23] so your first input will probably be = [18:04:32] so make the descent rate smaller [18:04:41] add 1 ft/s to your altitude rate [18:04:50] I think :D [18:05:21] the reaction is quick, easily to see on the tape meter [18:06:14] I will experiment I have really not done too many manual landings yet honestly [18:07:08] well, "manual" [18:07:12] you mean ROD mode [18:07:13] P66 [18:07:17] not P67, right? [18:08:11] P67 is with manual throttle [18:12:55] back when the throttle oscillations actually caused us trouble landing with P66 was quite a challenge, because you couldn't judge your targeted descent rate very well. [18:13:02] which is really important for the ROD mode [18:13:26] Yes [18:13:31] ROD mode [18:13:37] but now, in any mission, it works quite well. Takes a bit of practice of course. [18:13:42] Yeah haha [18:13:49] Oh can I make a PDI page request? [18:13:57] of course [18:14:01] TLAND in AGS time (DEDA 254) [18:15:05] Would fit nicely between DEDA 231 and the TLAND already there :) [18:15:28] where would the astronauts write that down? I don't see it in the PAD form [18:15:40] in the timeline book? [18:15:58] Its in the timeline book yeah [18:16:07] Has a preprinted one in there [18:16:28] Along with putting the RLS into 240 [18:16:38] I see [18:16:48] yeah, that TLAND is the time tag for that liftoff state vector [18:17:10] was that value updated? [18:17:23] I mean my TLAND is different than the actual from the mission [18:17:44] right [18:18:00] About 7 minutes difference [18:18:10] I would think that would be significant [18:19:39] But I dont think it was changed on the actual flight during the flight [18:19:57] But our padloaded tland is always different from actual from my experience with this mission [18:22:42] But I see your point it isnt in the PAD page [18:23:09] Maybe put it in the DOI page where the uplink for a new TLAND is [18:24:18] yeah, I'll certainly add it somewhere [18:24:29] Thanks [18:24:55] Are you adding DEDA entries to MCC? [18:25:37] I'm adding all the PADs [18:25:48] Perfect [18:26:00] Ok PDI time [18:26:02] and whatever else was given to the astronauts [18:28:37] I look forward to trying those [18:34:17] yeah, I am also going to add all the abort PADs that we don't have yet [18:34:52] So I left my RR in auto track per the timeline I am curious to see if I get any alarms [18:35:10] Or was it slew that caused the problems [18:35:57] slew I think [18:36:10] but we can't get the 1201/1202 alarms yet [18:36:20] we don't simulate that RR issue [18:37:15] we can fairly easily simulate it once the big yaAGC input/output pulses update is implemented in NASSP [18:39:18] Ah ok [18:39:23] I just left it per the timeline in auto [18:39:35] I just made my first ROD landing [18:39:45] However I have continuous dust around the LM [18:39:58] Ah there it goes [18:40:06] I dont remember that fine dust [18:40:21] Alex added that [18:40:25] Very nice [18:41:56] makes the landing a bit more immersive, doesn't it [18:44:20] oh and wait until you see what happens at staging [18:57:15] I look forward to it indeed [18:57:26] ECS report, everything is still ship shape after landing [18:57:49] cabin 68 suit 60 all glycol pressures and temps good [18:57:58] nice [18:57:59] lr rr and sbd temps good [18:58:02] great [18:58:09] time for a small step then [18:58:17] The one thing I had not tested was the LR operational heat [18:58:30] But at landing it is just above 150 [18:58:38] still have to open the door though [18:58:44] Designed to work between 0 and 185 [18:58:56] Haha yeah I am going to test and maybe tweak depress as well [19:01:18] But same with pressurization, that last little bit of pressure/mass to transfer takes forever [19:02:08] I have had a few random ctds with the LM [19:02:16] Happen when I switch panels fast but not all the time [19:02:44] Unfortunatly since I cannot debug properly and have no forsight to attach the process, its hard to figure out [19:04:19] I recently had a CTD when switching panels in the LM. Debug said it was the MFD's [19:04:36] https://www.dropbox.com/s/ac5cl549d22v4b0/CTD_Feb1.png?dl=0 [19:05:10] I cant wait to wipe my computer next week haha [19:05:16] Its been far too long [19:05:28] A while ago we had change an outdated function for the MFD's in the LM...thought that had fixed it, but guess not [19:07:15] Yeah sounds similar to my behavior [19:24:29] indy91, if one presses the CM separation from the SIVB stage, would the CM just separate from it with the rest of the SIVB/SM staying together? Right now if you do that, the CM separates, but the SIVB doors open exposing the LM and the SM just disappears [19:25:18] very non-nominal thing to do (flip the CM/SM switches while still on the SIVB) [19:27:05] If you do that from the SII stage or full stack config, a new vehicle is spawned with the entire stage, minus CM. But we don't have a model for the SIVB with only a CM on it... [19:27:39] SIVB with only SM on it* [19:37:19] in my oppinion it should just fire the CM/SM sep pyro's and not the CSM-SIVB sep ones as well. [19:50:53] Honestly wonder how the logic is with that [19:51:09] I would agree that seems like the correct behavior but I dont know how that works [19:52:10] I think we simply need a Sat5Abort3 project file, configured for aborted SIVB stage, with a flag for displaying the SM [19:52:43] basically like Sat5Abort2, minus the SII [19:53:45] Well if that stuff is being messed with then the optics cover issue can be tackled as well [19:54:10] optics cover issue? [19:54:43] Its been a while since I saw it and paid attention, but for example when you jettison the CM from the SM, the optics cover is gone, regardless if you jettisoned it or not [19:54:52] Also, the entry mesh I believe has the cover back on [19:55:19] right [19:55:31] morning! [19:56:45] Hey, it may be afternoon here but good morning, I am getting more coffee :P [19:56:57] hahaha [19:57:02] hey Mike [19:57:06] 4 minutes left until noon, still counts :P [20:04:00] I'll take it [20:04:31] I am already seeing one issue with the glycol loop, not enough heat [20:04:44] But we have a lot of systems not generating heat yet so that is actually a good thing [20:05:05] I am curious what it does during the short 11 stay on the moon [20:08:33] the S-IVB vessel, when it gets created, always deploys the SLA right now [20:09:01] any abort during a lower stage creates a different vessel with different code [20:09:32] and a S-IVB+SM is just the S-IVB vessel really [20:16:11] cya [20:17:12] And another CTD :( [20:19:46] Cabin pressure and temp fluctuates a lot during 30x [20:19:56] Might have to look into a better way to stabilize those [20:25:21] Do our CES C/W lights reset using the gyro test switch as per the checklist? [20:26:53] Probably not [20:27:16] Ok just curious [20:28:03] Any news on the power transfer issue? Haven't had a chance to look, I've been hit by the flu epidemic unfortunately. [20:34:51] thymo, crap that sucks... [20:35:20] rcflyinghokie, good question on the CES, I would think not yet... [21:00:52] Thymo, nothing new unfortunatly [21:01:05] I havent looked much further into it yet [21:01:42] AlexB_88 when I calculate a plane change, alignment time is the LM liftoff time? [21:02:00] yep [21:06:26] I am trying to find the mission rule for a plane change [21:13:07] yeah I'd be curious about that one [21:13:16] I never bothered with it on Apollo 11 [21:14:02] My calculated is 10fps [21:14:10] Seems easy for the LM to make up [21:14:25] oh for sure [21:17:39] Haha this part of the mission my cabin temp is the same as the actual temp as reported by the PAO [21:18:09] Pressure is within 0.2 psi [21:19:02] Lets see how this depress works out [21:25:37] wow [21:26:21] Temp holds well but there isnt enough heat in the glycol loop to raise it much more [21:26:46] But we barely have the minimum heat load coded yet [21:26:52] So again this isnt a bad thing [21:32:19] yeah makes sense [21:32:30] i'll be out for a bit, cya! [13:07:49] morning [13:18:32] hey [13:22:13] I'm experimenting a bit with the PTC REFSMMAT [13:22:41] we know the one Apollo 10 used from a preflight document, so I am trying to figure out how to calculate that one exactly [13:31:04] nice [13:32:05] for the later missions the PTC REFSMMAT wasn't even dynamically calculated with actual flight data [13:32:19] instead it was more important that the flight plan IMU angles could be used [13:32:45] so the uplinked REFSMMAT was known before the flight and would have been used for any launch day [13:33:03] interesting [13:33:27] probably the case for Apollo 15-17, maybe 14-17 [13:33:45] and for Apollo 15 we have that REFSMMAT in the SCOT [13:34:06] ah, right so we could directly use that one [13:34:08] so, when we get to 15 with the MCC, I will hardcode that REFSMMAT [13:34:11] yep [13:34:55] and right now I am trying to uplink the Apollo 10 PTC REFSMMAT from the preflight document, to see if it is any good [13:35:13] ah so this as the reason for that old hard-coded REFSMMAT page in the PAMFD :p [13:36:05] haha, I don't think so [13:37:14] they used some strange methods, like putting a CSM on the lunar landing site and doing a coarse alignment to 0,0,0 there to get the REFSMMAT [13:37:26] because they didn't know how to calculate the landing site REFSMMAT [13:37:52] haha, really? [13:38:02] like in a simulator? [13:38:23] oh, you mean the older NASSP versions [13:38:25] yes [13:38:34] that's how they got the hardcoded ones in the PAMFD [13:38:41] right [13:38:44] there is a forum thread about this [13:38:52] but the forum doesn't work [13:38:54] I remember the discussions on that in the forums [13:38:55] again [13:38:58] yeah [13:39:27] we really need a new forum [13:39:55] when we move then it makes sense to get a subsection of the Orbiter Forum [13:39:59] like SSU has [13:40:08] yeah [13:41:03] that will also help with getting more people from the forum interested [13:41:28] LM pressurization works quite well now [13:41:40] yes, and I think there are a lot of people who try to join the current forums, but they are not getting approved [13:41:51] yeah, possible [13:43:31] I've been working on getting CM/SM separation during SIVB stage (off-nominal) case working [13:44:17] One trial I have made on my copy that works well is create a very simple Sat5Abort3 (SIVB stage) [13:44:33] right, like the other abort stages [13:44:38] yes [13:45:03] so if the new stage is CM_STAGE, it calls Sat5Abort3 [13:45:15] and not Sat5Stage3 [13:45:41] Sat5stg3* [13:45:50] which is the normal SIVB [13:46:40] yes [13:47:57] separate vessels for the stages can be annoying with aerodynamics and sending signals back and forth between them, but in return it will simplify so many things we have to do with overly complex solutions right now [13:48:43] https://www.orbiter-forum.com/forumdisplay.php?f=39 [13:48:56] this is a good place for us, I think [13:49:11] now our forum works again, haha [13:49:16] I've got it working well, I just have to adjust the offsets a bit. It adds a new project file of course. I can uplaod my work later today if you want to check it [13:49:26] yes [13:50:16] actually, maybe I'll upload it now. I won't PR yet [13:50:21] ok [13:50:43] I've uplinked the actually PTC REFSMMAT, let's see if it actually is in the right coordinate system [13:50:47] actually used* [13:51:55] the RTCC MFD does all its calculations in the coordinate system Orbiter uses. And only for uplinks is anything converted to the AGC coordinate system [13:55:04] the document with the REFSMMAT quotes another document, "Proposed PTC REFSMMAT for the May 1969 Launch Opportunity of the Apollo F Mission" [13:55:11] now THAT is a document I would like to read, haha [13:55:31] probably would explain everything about the calculation and logic behind it [13:57:04] haha [13:57:23] alway teasing us [13:57:34] hmm, this REFSMMAT doesn't directly point an axis towards the sun [13:57:43] 10-20° off I would say [13:57:56] that could still be ok and right [14:04:23] "The IMU Y-axis pointing was determined so that the possibility of gimbal lock occuring for transearth midcourse burns is minimized" [14:04:35] so a little more going on with this PTC REFSMMAT [14:04:48] I am tempted to hardcode this one [14:09:21] yeah, maybe a good option [14:10:12] so each mission can have their custom REFSMMAT's? [14:10:27] PTC REFSMMATS* [14:10:56] for the MCC, sure [14:11:06] ah yeah for the MCC [14:11:11] RTCC MFD is more tricky [14:11:21] yeah [14:11:29] Here is my work so far: https://github.com/jalexb88/NASSP/commit/96ff466c97594facb6cd24496070fee28c101930 [14:13:54] looks pretty good [14:19:03] One question I have, If you stage the CM during SIVB powered flight before insertion, a small velocity is applied to the SIVB pushing it back. (stage == LAUNCH_STAGE_SIVB) Once in orbit though, if you stage it, it does not apply the velocity (stage == STAGE_ORBIT_SIVB) Should we have a velocity applied for both? Or none at all? [14:19:49] what is that even for, making it not crash into the CSM? [14:19:59] "vel1 = _V(0, 0, -4.0);" That was taken from the case where you do this from SII flight [14:20:12] yeah I guess [14:22:05] let's keep it as it is [14:22:38] sure [14:26:16] I just noticed that the LS REFSMMAT during TLC option is unnecessary [14:26:33] because with the approach azimuth that REFSMMAT is already fully defined [14:26:58] so no need to consider the trajectory with MCC-4 and LOI-1 [14:30:19] So you mean instead of calculating the REFSMMAT with MCC-4, now it can be calculated with the approach azimuth [14:30:46] yeah [14:30:56] not sure if the calculation shortly before the landing is the same though [14:31:16] so maybe there is a good reason to keep separate options [14:32:23] so planned approach azimuth before LOI [14:32:29] actual CSM orbit after LOI [14:32:30] anything is better that putting a CSM at the landing site [14:32:34] yes [14:43:55] up to MCC-1 [14:44:15] that might be a tricky logic for scrub or not scrub, because they didn't follow their own mission rules for this [14:49:52] later missions had preferred MCCs, mostly MCC-2 and 4, but for Apollo 10 they just skipped MCC-1 because MCC-2 wasn't much more DV [14:55:14] maybe we'll just have to be more disciplined then the real mission [15:30:10] https://www.dropbox.com/s/v6mk5gahwx86gwp/SIVB%20abort.png?dl=0 [15:30:22] "sorry Houston, hit the wrong switch" [15:42:01] PR sent [15:43:02] can easily happen. It's not like those switches are guarded, with yellow black stripes to distinguish it from other switches. [15:45:07] I guess they must of screened out colour-blind astronaut [15:46:55] better for mission success [15:52:26] Good morning [15:52:56] hey [15:54:02] I have cabin depress down closer to 3 minutes [15:54:09] next thing i'm going to try is have the aborted full stack not disappear when aborting from the launchpad [15:54:36] adding touchdown points to Saturn5Abort1 should do the trick [15:54:48] rcflyinghokie, nice! [15:54:51] hey Ryan [15:55:44] I might make the front hatch about 5 minutes because of the filter [15:57:23] yes, makes sense [15:57:33] what did you change for this? [15:57:36] upper hatch valve? [15:57:59] changing that also will have an impact on LM pressurization of course [15:58:21] Right [15:58:32] That will be checked next for issues [15:59:02] Now one thing I noticed, the LM 11 AOH vol 2 says 2 minutes for the hatch to be opened yet the LM 10 vol 1 says 3 [15:59:42] And yeah the valve sizes are what I am adjusting but with the max flow limits in place it still has some governing [15:59:56] 2 minutes only for a full depress? [16:00:23] Actually that might be from 3.5psi [16:00:34] But its 3 minutes for a full depress normally [16:00:40] From 5psi [16:01:52] I remember reading a statistic for the filter in place but I cant find it [16:05:00] I need to also figure out which systems I can add heat next for [16:05:30] With the crew in, the cabin hovers around 63 degrees but without it its in the mid 50's even full hot [16:08:17] did Apollo 13 have trouble with that, with so many systems powered down? [16:08:27] the CM did for sure, but the LM as well? [16:09:10] Yeah [16:09:41] If I recall the loop was required while the IMU was up [16:09:54] But when the IMU was powered down I think the glycol pumps were turned off as well [16:11:54] so it can't have been a much nicer temperature in the LM than in the CM [16:13:05] Just a little warmer because the 3 crew were usually in the LM [16:13:14] And the heat stayed there [16:13:39] They did transfer water for LM cooling from the CSM waste tank at some point [16:13:49] Probably to conserve potable water in the LM [16:20:46] I also found a few procedural errors on my part that help the cabin properly depress as well [16:21:25] great [16:22:02] oh, yesterday night I found that the AS-502 S-IVB flight evaluation report has a list of prelaunch events [16:22:15] so those commanded by the LCC and the terminal sequence controller [16:22:20] just the S-IVB ones though [16:22:30] switch to internal power and that kind of stuff [16:23:07] and of course it's Apollo 6, so it might not be representitive [16:23:25] it also has the flight sequence program [16:23:34] so all scheduled events during the flight [16:23:38] I would imagine it would be pretty similar [16:25:05] yeah, the prelaunch events should be [16:25:35] Ok fwd cabin dump 4 minutes and 15 seconds from 5psi [16:26:19] until you were able to open the hatch? [16:26:23] Yes [16:26:28] that seems almost too quick [16:26:37] didn't it take muuuuch longer on Apollo 11? [16:26:41] Yes [16:27:28] I can make the fwd hatch take that long time [16:27:43] hmm [16:28:20] I'd say the best time is some compromise between specification for the average mission and actual times for the average mission [16:30:09] They started using both hatches later [16:30:20] oh, interesting [16:30:23] And Apollo 12 they peeled at the cornet of the hatch to break the seal early [16:30:28] cornet [16:30:31] corner [16:30:33] wow [16:31:04] they had both a cornet and a coronet on board? woooow [16:31:24] [It has been almost 20 minutes since Buzz opened the dump valve for the final depressurization. For the first Apollo 12 EVA, the same sequence of events took only 8 minutes, primarily because Pete and Al went after the hatch as soon as the cabin pressure was under 0.2 psi. In detail, Pete and Al had the hatch open 3 minutes after starting the final depressurization, where as Neil and Buzz took roughly 11 minutes.] [16:31:32] messing with the hatch too much seems like a bad idea though :D [16:32:17] so on 12 they probably managed to open the hatch earlier than the 0.08(?) PSI? [16:32:21] Yeah there was a review conducted to see if they could break it by accident by doing that [16:32:41] Yes they unlocked it, and grabbed the corner and pried it back [16:33:08] I don't mind either way, you've done the research, you decide [16:33:32] my whole contribution is having read the Apollo 11 transcript about this a few years ago :D [16:34:37] Also fun fact they were allowed to use both valves on later missions but the average astronaut couldnt reach it [16:35:07] They also used the overhead for equipment jett on 11 and removed the bacterial filter after 11 [16:35:21] But dumping still took longer than 3 minutes per the AOH [16:35:26] yeah, I knew about the equipment jett [16:35:34] I'm sure Pete couldn't have reached it [16:36:31] not really a tall one: https://en.wikipedia.org/wiki/Skylab_2#/media/File:Skylab_2_Crew_Members.jpg [16:37:36] No he couldn't [16:38:14] Pete is the shortest (169 cm) of the moonwalkers and, although Al (177 cm) is taller, he is still 3 cm shorter than any of the three astronauts known to have used the overhead valve. [16:38:52] the average test pilot is not very tall [16:39:06] They could reach it in just the PGA's because they could maneuver around a bit but attached to the PLSS they couldnt say step on the engine cover to reach it before an EVA [16:39:08] Nope [16:39:15] Makes me well suited at 5'10 [16:39:16] I know all about it, as an intern I kept the record for the Airbus and German Air Force test pilots [16:39:40] HMI department, we measured a bunch of them ourselves as well [16:39:58] My best friend is 6'4, and believe it or not flies Apache's [16:40:27] He says they are very accommodating to tall and short pilots alike [16:40:37] that's nice [16:40:55] He wanted to fly Kiowas but was too tall [16:41:12] I guess if you end up being too tall for a specific aircraft they can always make you fly cargo aircraft :D [16:41:36] Haha indeed [16:41:46] brother of a friend of mine was too short actually [16:41:53] problem was the ejection seat [16:42:00] Yeah that usually is the reason [16:42:28] Unsafe to eject someone that doesn't fit right [16:42:35] yeah [16:43:01] Most aircraft I fly the height limiters are usually just ability to reach the rudder pedals [16:46:30] 32 ft/s for MCC-1 [16:46:36] as calculated by MCC-H [16:46:52] Apollo 10? [16:46:55] yep [16:47:03] scrub decision is MCC-3 being smaller than 35 ft/s, if MCC-1 or 2 are not executed [16:47:17] Oh that reminds me, what were the mission rules on a plane change? [16:47:26] in lunar orbit? [16:47:31] Yes say for 11 [16:47:35] hmm [16:47:38] not sure [16:47:45] have to look that up [16:47:59] I never found one and I just used my judgement [16:48:08] Something that the LM could probably easily make up [16:48:19] I usually get about 9-11 fps [16:48:31] oh, the plane change during rendezvous [16:48:35] not the LOPC maneuver [16:49:20] No this is LOPC [16:49:30] ok [16:49:39] I need to work on the plane change targeting of the RTCC [16:49:46] it's not super reliable I think [16:51:01] it might be a crossrange constraint for the ascent then [16:51:02] 8NM [16:52:45] Ah that would make sense [16:52:56] did Apollo 11 perform the plane change? [16:52:59] No [16:53:31] flight plan has one at 16.6 ft/s [16:54:06] Which flight plan? [16:54:28] Oh yeah in the summary [16:54:41] They didn't burn one though [16:55:17] yeah, I guess it was scrubbed [16:55:44] 107:12:06 Collins: Okay. P00 and Accept you got. And this is an updated landing site REFSMMAT. We still believe that a plane change is not required. Is that affirmative? [16:55:44] 107:12:15 McCandless: That's affirmative, Columbia. [16:56:45] Also right below that in the transcript I checked my LM and it was exactly the same [16:56:45] [Long Comm Break. Public Affairs reports that the LM cabin pressure is 4.86 psi and the temperature is 63F.] [16:56:58] Coincidence probably but still cool [16:58:17] haha, nice [16:58:26] Ok so letting it go to 0.08 from 3.5 with just 1 valve open took Apollo 11 11 minutes [16:58:54] Letting it go down close to 0.1 from 3.5 took Apollo 12 3 minutes [16:59:12] And actually it does take a bit to go from 0.1 to 0.08 [16:59:33] yeah [16:59:39] that's where it gets really slow [16:59:41] All crews after 11 grabbed at the hatch and got it open at about 0.01 [17:00:12] so a mini game to implement. Click very hard and often on the hatch and it opens earlier :D [17:00:14] Literally peeled back a corner [17:00:20] Haha! [17:00:49] So we can either change the hatch to open at 0.1 or just accept longer depress times [17:01:07] I'm for keeping 0.08 PSI [17:01:12] I agree [17:01:58] So i will make the depress time from 3.5 psi to about 10-11 minutes [17:02:14] That is from 11 [17:02:18] With the filter installed [17:03:58] Still seems a bit long compared to the AOH [17:04:04] yeah [17:04:35] Actually I wonder how long Apollo 9 took [17:06:00] [For Apollo 11, the forward dump valve is equipped with a bacterial filter which is having a considerable effect on the speed of decompression. The filters will not be flown on subsequent missions. With the filter in place, cabin pressure drops from 5.0 pounds per square inch, absolute (psia) to 0.08 psia in 310 seconds versus 180 seconds without the filter. Use of both the forward and overhead valves without filters [17:06:00] would bring the time down to 90 seconds. For most of the Apollo EVAs, one or the other of the valves was used; although, for the equipment jettison they will do after the EVA, 114:10:28 Neil and Buzz will use both valves. Because of the relatively large surface area of the hatch, it cannot be opened at cabin pressures much above 0.1 psia.] [17:06:11] I think I might just use those numbers [17:06:22] 5 minutes on Apollo 9 [17:06:39] Ok and no filter installed I assume [17:07:03] And no PLSS to outgass [17:07:06] Well, 1 [17:07:09] Not 2 [17:07:11] "The cabin atmosphere was dumped through the cabin bacteria filter (on the dump valve) before the EVA period" [17:07:18] Oh interesting [17:07:43] "The required time to dump with clean air is a maximum of 5 minutes 10 seconds for a lunar surface timeline", also from the Apollo 9 Mission Report [17:07:53] Hah [17:08:10] Yeah that never happened unless they attacked the hatch [17:08:19] they just took the actual time and added 10 seconds and called it a requirement :D [17:08:26] But I think 5 minutes is a good number to use [17:08:31] I agree [17:08:35] And 3 for the overhead [17:10:03] oh, on this Apollo 10 flight, LM pressurization worked very well [17:10:32] repressing the CM cabin to 5.7 PSI helped [17:11:35] I've solved the issue of the stack dissapearing during pad aborts. I've separated the condition of if ((stage == PRELAUNCH_STAGE || stage == LAUNCH_STAGE_ONE) && new_stage >= CSM_LEM_STAGE) into two separate sections for what happens with PRELAUNCH STAGE and LAUNCH_STAGE_ONE. [17:12:54] Yeah the repress is what makes the difference [17:15:12] basically the LAUNCH_STAGE_ONE is the same as before, but I've separated the PRELAUNCH STAGE so it reads VESSELSTATUS2 and used the function vrot.x: altitude of the CoG above the surface for vessel with LANDED status [17:15:27] like I did it with the LM [17:16:10] sounds reasonable [17:16:35] and of course with the added TD points to Sat5Abort1 [17:16:55] just need to fine tune the TD points and the CoG altitudes [17:17:40] but its all isolated in the prelaunch stage so that one its launched, it works as before [17:21:32] Apollo 10 S-IVB flight evaluation report also has the terminal countdown sequence [17:22:01] so at least for the S-IVB we have a nice list now [17:22:28] from T-20 minutes to T-0 [17:22:59] now I really have to look if we have any postflight reports about any of the other single Saturn stages [17:36:08] So here is a question, why can I open the overhead hatch at 0.5 psi? [17:36:44] so, for that hatch the pressure differential to the tunnel is used, not the absolute cabin pressure [17:37:05] but the tunnel should of course vent nearly instantly [17:37:18] I am adding tunnel pressure to my debug string [17:37:39] I have a feeling it is not venting properly [17:41:09] I can add some more code to the CSM/LM connection/disconnection [17:41:19] changing valve sizes etc. [17:42:09] Well let me check that pressure [17:42:15] if it is zero something else is up [17:42:43] I bet it's not 0 [17:43:09] Its zero when I load my scn [17:43:17] Lets see what happens when I dump the pressure [17:43:38] Yep I have tunnel pressure [17:43:48] That valve needs to be huge [17:44:02] Like 1000 [17:44:34] Thats also why my ovhd hatch was taking much longer to dump [17:45:04] it's 10 by default [17:45:10] Yeah that is too small [17:45:22] but, I mean, it's the same size for the case docked and undocked [17:45:34] Hell I have the forward hatch at 35 for a 5 minute dump [17:46:03] I think that shouldnt be a problem since the tunnels basically become one [17:46:09] Of course I will stability test it [17:46:10] yes [17:46:19] this again will have a very large impact on LM press [17:46:28] A good one I would think [17:46:43] yeah [17:46:45] Would help reduce the time [17:46:56] could also make things unstable, if too large [17:47:00] so is should also get max flow [17:47:03] Yes [17:47:05] so it* [17:47:29] Where are those I can experiment with them and include them with my hatch changes [17:47:41] LMTUNNEL:OUT [17:47:55] What controls that in code [17:48:08] the size? nothing [17:48:20] Is it just connected? [17:48:21] that valve is always connected to the LMTUNNELUNDOCKED pipe [17:48:37] and that pipe is either connected to the VENT tank or to the CSMTUNNEL [17:48:54] which also has valve sizes 10 [17:49:20] Are there any max flows for these in place? [17:50:07] I didn't put any in there [17:50:30] Ok I will increase the valves in the config and add a max flow [17:50:51] Where should the max flow on the CM side go? [17:51:26] we have a lot of valve between the two cabins, haha [17:51:38] 4? [17:51:47] LM Cabin->valve->pipe->valve->LM tunnel tank->valve->pipe->valve->CSM Tunnel tank->valve->pipe->valve->CSM Cabin [17:52:00] 6 [17:52:17] So 3 pipes need flow regulation [17:52:28] I think 2 already have it [17:52:30] and I guess all the 4 middle pipes should be 100 size by default? [17:52:39] Yeah we can start there [17:52:47] I am actually thinking 1000 is needed [17:52:49] the two valves connected to the cabins are the only ones manipulated in their size in code [17:53:25] Ok lets see what this does.. [17:53:27] and it should probably be close to identical valve sizes for all 6 of them, in the docked and all hatches open case [17:53:57] Right everything in between the hatch valves should be the same [17:54:17] yeah, I think the sizes of the 4 middle valves are not changed anywhere in code [17:54:33] their connections are [17:54:45] So I need a max flow on CSMTUNNELUNDOCKED and LMTUNNELUNDOCKED [17:54:47] at least the 2 middle ones [17:55:16] Should those just go in the init's? [17:55:31] in there respective systems files [17:55:45] yes [17:55:48] Ok [17:56:01] there are already a bunch of SetPipeMaxFlow for the CSM [17:56:11] in Saturn::SystemsInit [17:56:27] Seems like the proper place [17:56:59] Does the lm tunnel pressurization valve or tunnel vent have sizes or flows in code? [18:01:57] (LM)CABIN->CABIN:OUT2->CABINOVHDHATCHVALVE->LMTUNNEL:IN->LMTUNNEL->LMTUNNEL:OUT->CSMTUNNELUNDOCKED->CSMTUNNEL:OUT->CSMTUNNEL->CSMTUNNEL:IN->FORWARDHATCHPIPE->FORWARDHATCH->(CSM)CABIN [18:02:03] just wanted to write that down [18:03:13] and to your questions, both don't have their sizes changed in code [18:03:29] and probably no max flows [18:03:35] unless you added them [18:03:45] Nope [18:04:07] I can try to get those timings down though I think the tunnel vents way too slow right now [18:04:28] But I will get this LM side done first then go back to pressurization [18:04:40] And thanks for the schematic :) [18:04:41] in one of your recent PRs you increase the tunnel vent valve size a lot, I remember [18:04:50] Yes [18:05:00] Still wasnt a fast vent though [18:05:05] but having all of those at 100 might already make a lot [18:05:09] those valves* [18:05:49] Right I wanted to know if those were in code somewhere so once the tunnels are behaving like tunnels and not tiny holes I can go adjust the press and vent valves accordingly [18:06:22] LM takes about 5 minutes to dump via the fwd hatch now though [18:06:27] (CSM)CABIN->LMTUNNELPRESSURIZATIONVALVE->LMTUNNELPRESSURIZATIONPIPE->CSMTUNNEL:LEAK->CSMTUNNEL and so on for the backup press method [18:07:15] And the vent? That just goes from CSMTUNNEL to CABINVENT? [18:07:59] CSMTUNNEL->CSMTUNNEL:OUT2->TUNNELVENTVALVE->CABINVENT:IN->CABINVENT [18:08:26] CSMTUNNEL:OUT2 is opened and closed in code with the switch [18:08:39] And I know I have asked this before, but the valve sides on the cabin vent are irrelevant since they just eliminate what goes into it? [18:08:46] so the only two parameters for it really are the valve size there and the pipe [18:08:57] sizes not sides* [18:09:11] hmm, I don't think they are irrelevant [18:09:25] the vent is basically a normal tank [18:09:30] morning! [18:09:39] so the pipe calculation from one tank to another (vent) is still the same [18:09:53] a vent just vents everything in it when its timestep is called [18:09:55] hey Mike [18:10:15] so, it might make sense to have multiple vents, or multiple valves on the vent [18:10:35] actually [18:10:56] because the flow is always towards a vent, the valve size on the vent is irrelevant [18:11:10] tank->valve->pipe->ventvalve->vent [18:11:25] the size of the valve and the max flow (if any) of pipe are relevant there [18:11:27] Thats what I thoguht [18:11:28] thought [18:11:43] Typing with bandaged fingers is annoying [18:12:45] oh no, why bandaged? [18:12:59] did you punch a NaN in the face? [18:13:01] Haha well um, lets just say I lost a fight with a hot cast iron pan [18:13:18] a worthy enemy [18:13:38] Indeed [18:13:56] At least my panko crusted chicken came out ok [18:14:58] I put it down on the stovve top out of the oven flipped the chicken got distracted, and went back to grab it having forgot I took the potholder off of it [18:15:10] Heat transfer was very efficient [18:15:43] I hope the same goes for the LM ECS [18:17:02] As do I [18:17:32] Which reminds me I know we have heat loads split between loops but I am worried that might not be the best solution as far as adding heat to the system [18:17:43] Now I want to leave it as is until we have most heat loads online [18:18:08] But we might have to reconsider how those are distributed as I think it is robbing the loop of heat [18:18:53] Maybe even making each cold plate a radiator and doing it similar to the IMU [18:19:22] Adding heat to the radiator and attaching it to both glycol loops, and obviously the heat transfer would be handled by the loop running [18:19:50] I'm sure that can be done [18:21:03] I think it would work well but until we have more systems with heat I would rather wait [18:25:40] indy91, here is my initial commit for the launch abort stuff: [18:25:40] https://github.com/jalexb88/NASSP/commit/e04e765517491e17932da1797c20a063b1e381eb [18:25:59] still a few things to work out before I PR [19:08:35] looking forward to not having the Saturn disappear [19:09:12] now we just need to implement the canard on the LET and I can finally make a video on launch aborts, haha [19:10:50] yeah [19:11:23] one other small issue, is that the addforce seems to push the CM down if you launch during the addforce period at ignition [19:11:44] if you abort during that period, I meant* [19:14:19] Well these large valves do wonders for venting the tunnel when a vessel is alone, but they seem to create a lot of super fast back and forth flows when all connected [19:15:07] I also cannot seem to locate a good flow for the pressure equalization valve [19:41:47] indy91, is there a way to set a max flow in both positive and negative directions? [19:42:13] The lack of flow limitation on the overhead hatch of the LM when it is flowing into the LM is creating instability [19:42:17] PR sent [19:42:34] like can I do +/- 660 LBH or something like that? [19:42:46] Not typed that way but a plus or minus flow for a max [19:55:15] oooooh [19:55:21] that is missing in code [19:55:50] that might help with a few instability issues [19:55:57] line 852 in hsystems.cpp [19:56:38] it's missing ", flowMax * dt" [19:56:46] as compared to line 846 [19:56:57] that should definitely be there [20:02:21] Ah [20:03:08] if ((two_ways) && (out_p > in->GetPress())) { [20:03:09] h_volume v = out->GetFlow(dt * (out_p - in_p), flowMax * dt); [20:03:13] Should that do it? [20:04:35] yep [20:04:58] that's was bug, as simple as that [20:05:17] Lets see if that helps with this tunnel [20:05:30] how large did you make the valves? [20:07:42] Well I have to balance the ability for the tunnel to vent when not connected to anything with stability connected [20:07:57] I am experimenting with 100 on the CSM side and 1000 on the LM side [20:08:52] Doing LM Press situations right now [20:10:17] is it really super important that the overhead hatch opens a bit earlier than forward one? [20:10:49] Not super important [20:11:11] even the CM side hatch is only size 100 when open [20:11:16] so 1000 seems excessive [20:11:24] Its the dP that makes it unusual though you can open it at .5 psi [20:11:31] On the cabin gauge [20:12:12] I could change the CSM/LM connect/disconnect some more [20:12:31] like, directly connect the cabin with the vent when undocked [20:12:54] It might be helpful [20:13:30] But I might be able to get this to work [20:14:27] so, if you can open the hatch at 0.5 PSI, then the LM tunnel tank has to have 0.42 PSI or more [20:16:00] did you look at the masses and pressures in cabin, LM tunnel? [20:20:36] hmm I guess we can get rid of the Quickstart Mode tab in Project Apollo Configuration? [20:20:54] yes [20:21:01] but that has a bunch of implications [20:21:01] Does that tab have anything left that is relevant? [20:21:19] and I don't even know how to change the code for the tabs [20:22:39] "Disable lighting of the backup sequencer switches on panel 1" [20:22:52] wonder what thats all about [20:23:03] those buttons used to have lights [20:23:08] only worked in quickstart mode [20:23:15] I deleted the code for that ages ago [20:23:57] could you even still set quickstart mode in the scenario? What was it again, REALISM [20:24:15] not sure [20:26:00] indy91, not masses just pressure [20:27:13] I'll look at the vent mass and pressure as well, I have a suspicion it's not getting empty until the pressure difference calculation is done [20:28:52] I really think the LM tunnel tank should not have any significant pressure, even without huge valve sizes [20:29:02] Yeah I have them back to 100 [20:29:26] I get really bad fluctuations changing panels in the CM now in the LM pipes [20:30:45] large valves [20:32:00] OH MAN [20:32:32] just heard back from Francois [20:32:39] the guy that owns that AGC that he made a video with is interested in meeting me [20:32:51] and there will be a window where I should be able to take measurements on it in early July [20:33:08] awesome [20:33:14] time to start putting together a test plan -- hopefully this will resolve all of our remaining unknowns! :D [20:35:30] also need to pick up a macro lens, I want at the very least to get a stupidly high resolution panorama of the backplanes [20:36:58] yeah, better do that :D [20:41:15] so with valve sizes, I get about a mass factor of 100 between cabin and tunnel [20:41:48] valve sizes 100* [20:42:04] 0.8 PSI vs 0.2 PSI right now [20:42:10] I'm just doing the simplified testing [20:42:14] the vent tank should be ok [20:42:16] always 0 [20:43:29] 0.5 vs. 0.13 PSI [20:44:17] one of our issues in general is the behavior in near vacuum [20:44:58] 0.35 vs. 0.1 [20:46:04] Yeah that sounds about what i was seeing [20:46:12] 1 gram in the tunnel left, 0.07 PSI [20:46:13] I am leaving the valves at 100 [20:46:17] They seem stable [20:46:34] Adjusting pressure eq flow [20:46:37] valves that large just won't like long timesteps too much [20:46:46] Nope [20:46:56] but we have the ability to limit the timestep length [20:47:01] of the systems [20:47:09] and just do 2 or more per Orbiter timestep [20:47:26] Even glycol pressure jumps a bit with small valves on panel switching [20:47:32] right now that is only used for really large time acceleration [20:47:44] But the most impact is in atmosphere systems [20:47:57] 0.2 vs. 0.05 [20:48:30] of course I'm using the old valve sizes in the hatch itself [20:48:37] Yeah those were small [20:48:52] or am I? isn't that handled in code? [20:48:57] Yes [20:49:07] I changed them in code locally [20:49:15] 10 [20:49:20] I am using 35 for the fwd hatch [20:49:27] quite large [20:49:38] But works properly [20:50:27] do we have any graphs with the pressure decay in the cabin when dumping? [20:50:36] I know there are ones for the CM [20:50:37] I'd really like to compare our behavior to the actual one [20:50:50] Not sure about the LM [20:52:08] LM Data book if we have one might have it [20:52:28] grumbles [20:52:54] .endlogging [20:52:54] Meeting ended by thewonderidiot, total meeting length 168207 seconds