cblack Posted August 24, 2019 Share Posted August 24, 2019 Does anyone know what temperature rocket exhaust is in the Launch Update? This post says that petroleum exhaust is 1500K, but it must be much higher than that now as I'm melting my tungsten automation wire with it. And now that petroleum rockets are melting tungsten, how are we expected to ever get hydrogen rockets working reliably? What temperature is the hydrogen exhaust now? Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/ Share on other sites More sharing options...
Glassyfo Posted August 25, 2019 Share Posted August 25, 2019 7 hours ago, cblack said: Does anyone know what temperature rocket exhaust is in the Launch Update? This post says that petroleum exhaust is 1500K, but it must be much higher than that now as I'm melting my tungsten automation wire with it. And now that petroleum rockets are melting tungsten, how are we expected to ever get hydrogen rockets working reliably? What temperature is the hydrogen exhaust now? My iron automation wires are doing just fine? Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1249719 Share on other sites More sharing options...
Sasza22 Posted August 25, 2019 Share Posted August 25, 2019 Weird the output temp was supposed to be capped below tungsten melting point. At least before it was. Tungsten was the only safe material as even thermium was melting at times. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1249838 Share on other sites More sharing options...
cblack Posted August 25, 2019 Author Share Posted August 25, 2019 I took at look at some other wires that didn't melt, and here are some temps I'm seeing: That conductive wire is nearly 2200K and from only petroleum rockets! I paid close attention to the exhaust temperatures during a more recent launch, and they're significantly cooler than that, so I don't understand how it can be so hot. Unfortunately I'm at the point now where I really need to use hydrogen, but my fear is it's going to bring a swift end to my space program (among other things) by melting all the wire below during takeoff/landing. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1249846 Share on other sites More sharing options...
Stoned Posted August 26, 2019 Share Posted August 26, 2019 I can confirm the exhaust used to be around 1500 C, a bit below 1800 k. But things exposed to the rocket thruster (core 3 spaces vertical of your rocket) will get hotter. The heat ist there for just a short moment when the rocket is passing, that’s why it usually only interacts with low mass items like automation wire. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1250473 Share on other sites More sharing options...
Lilalaunekuh Posted August 26, 2019 Share Posted August 26, 2019 Rockets did add thermal energy with a temperature cap. On 24.8.2019 at 10:31 PM, cblack said: This post says that petroleum exhaust is 1500K, but it must be much higher than that now as I'm melting my tungsten automation wire with it. Can you post a picture of your wires ? [I messed around with 3 solid thruster rockets and wasn´t able to melt tungsten in any scenario.] Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1250582 Share on other sites More sharing options...
cblack Posted August 27, 2019 Author Share Posted August 27, 2019 2 hours ago, Lilalaunekuh said: Can you post a picture of your wires ? [I messed around with 3 solid thruster rockets and wasn´t able to melt tungsten in any scenario.] I'm not using any solid boosters, just petroleum, though as I'm now out of that and need to move more weight anyway, my next launches will be hydrogen-based. Anyway, I assume you want more zoomed-out screenshots? Here's the basic layout: As you can see, I've got a lot of wire below them, and while it's not all tungsten, I know which of it is and which isn't and there was definitely some meltage of tungsten going on. In any case, I'm fairly confident that hydrogen will really melt the stuff, so as soon as I get LH2 production up I'm going to redo the rockets and give it a whirl. I'll report back with what has or hasn't melted. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1250656 Share on other sites More sharing options...
cblack Posted August 30, 2019 Author Share Posted August 30, 2019 Okay, so I promised to update this after using hydrogen rockets, so here it is. I did a synchronized launch to try and create a worst-case scenario: The wire on the left you see melting was all copper, so that's not surprising. The same is true for the automation gates that melted. But the best part? The tungsten wires are actually cooler than they were with the petroleum rockets. I'm not sure if there's just more exhaust, or it's cooler, or what, but I'm crossing my fingers it stays intact for future launches. The main issue now is the bunker doors below are overheating. I'm not sure if there's a way around that, but please let me know if you know of one. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1251992 Share on other sites More sharing options...
nakomaru Posted August 30, 2019 Share Posted August 30, 2019 The dry heat is the hot stuff, and it should cap at around 3000K exactly 3200K for all the rockets. I should do a test again later. Isolate a diamond tile below the exhaust to test the cap if you want. Personally, I run supercoolant through turbines and my silo circumference, including bunkers. It's backed with copper tempshifts. The system stays at about 150C with the bottom row of steel spiking to 300C upon firing. The coolant and silo itself up to about 180C. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1252005 Share on other sites More sharing options...
FutureJohny Posted August 30, 2019 Share Posted August 30, 2019 What I am interested is, not only, how much heat is created under various types of rockets, if there is difference at all, but also the shape of the heated area. I am in the middle of setting up exhaust/heat recovery system, and whle the exhaust part seems quite straightforward to me, I would like to know, how much heat per launch per engine type and from what area it needs to recover. Is the heating dependent on material, Is it more like aquatuner with fixed Delta T or Metal Refinery with fixed DtUs? Also, last time I was messing with rockets in debug (SI), it was possible to send engineless rocket only with a booster(s). You just had to remove the engine and build floor under the booster. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1252084 Share on other sites More sharing options...
bobucles Posted August 30, 2019 Share Posted August 30, 2019 Last I checked rockets had TWO types of exhaust. There's the obvious release of hot gas, but there's also a magic box under the engine that just arbitrarily gains heat. No vacuum or insulation can resist it, the material just gets hot. The magic box is the secret to getting 3000K heat and melting the highest end stuff. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1252093 Share on other sites More sharing options...
nakomaru Posted August 30, 2019 Share Posted August 30, 2019 1 hour ago, FutureJohny said: the shape of the heated area 3x9 1 hour ago, bobucles said: No vacuum or insulation can resist it, the material just gets hot Well insulation and neutronium will get hot, but not vacuum. I think I get what you meant though. (It ignores conduction, any medium in the zone heats up.) 1 hour ago, FutureJohny said: fixed DTU/s This. But each tile in the box heats at a little bit different rates I believe. Solid Thrusters probably act on their own 3x9 regions but I haven't tested that. They seem to add a tremendous amount of heat. By the way, it's capped at exactly 3200K. Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1252100 Share on other sites More sharing options...
Lilalaunekuh Posted August 30, 2019 Share Posted August 30, 2019 That´s how I deal with the exhaust of my 2 hydrogen rockets. [I have diamond on conveyor rails and a toggle to turn everything off if I am not in the mood to launch rockets and want more fps^^] Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1252110 Share on other sites More sharing options...
cblack Posted August 30, 2019 Author Share Posted August 30, 2019 Apparently you can also use this to put blocks of steel into the world: Link to comment https://forums.kleientertainment.com/forums/topic/110947-post-lu-rocket-exhaust-temperatures/#findComment-1252227 Share on other sites More sharing options...
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