samooo2

You have two options: a) install one or more heat exchangers. Not sure if they're from Interstellar or one of the recommended mods, maybe Heat Control. They act like radiators with almost zero heat dissipation but very high heat capacity, so you can keep the engine running for longer. b) install a pre-cooler. This reduces the heat generated by all air-breathing engines. Perhaps even combine a) and b), if it's not enough.

I get this too. Pebble bed is supposed to be entirely thermal, and I know it used to be. But now 6/7 of its output is in charged particles, making it almost useless.

Can you show the transmitter info as well? Based on just this image it looks like the reactor is running on idle since you're barely using any power.

It's been split into multiple different nozzles. Krusader for atmospheric launches, aerospike for...I guess general use? And then Wyvern, Pelican and one more turbojet, those are air-breathing. Also, they all have some fuel limitations now. Something about preventing chemical reactions between the propellant and the engine itself.

I'm not far enough in yet to use that generator, but if you just need solid hydrogen you can get that in any of the cryogenic storage tanks. By default they store something else but just rightclick them in VAB and it gives you like 20 options.

Even if you do calculate by hand it won't necessarily be accurate, since some thermal engines change ISP based on throttle or wasteheat level.

Thanks for responding. But I only added the transducer later, for comparison. Sorry, I should've been more clear. I can reproduce the problem even with just the thermal receiver, no other receivers on the ship or on others. Here is a minimal example: just a probe core, thermal receiver, thermal engine and two decouplers. You can see the ship is getting less than 0.5% power initially, and then jumps to full once I throw the decouplers away. Logfile: https://pastebin.com/wh0ZPMN8 It's not really a problem now that I have a workaround, it's just a ...weird mystery.

I'm getting some weird behavior with beamed power. I'm sitting right next to the transmitter, spotsize is tiny, facing is almost 100% and my thermal receiver is only getting about 0.5% of transmitted power. When I stick a microwave transducer on the same ship that one can receive the proper amount. Am I missing something obvious? Didn't have this problem with earlier versions, and I checked the videos above they don't show it either. My fisrt thought was a mod conflict, but the whole beamed power thing is exclusive to KSPI-E so I don't see how... EDIT: Seems to go away once I decouple two stages, ragardless of where they are mounted or what's in them. So I just carry two empty decouplers for every rocket launch, as a workaround.

Seems like the old version works fine with Kopernicus 1.8.1. Did seriously no one try, or am I going to run into problems later on?

edit: deleted

Too much stuff to quote, but basically: Maximum ISP is only based on fuel type and core temperature. That huge list of formulas. Afaik the various nozzle types should only affect which propellants you can use, nozzle mass, thrust vectoring, atmospheric performance etc. Minimum ISP is very weird. Each nozzle loses a set amount of thrust in-atmosphere, base on it's size and type. Like, say -60kN flat. It's the "treshold" value you see when you rightclick a nozzle in amospheric flight. So I guess you could calculate minimum ISP from your thrust at maximum ISP and sea-level treshold force, whatever that is. Also keep in mind some reactors (like the PebbleBed in your example) change their core temperature in-flight.

You're looking for LiquidHelium, the regular one. Helium3 is super rare fusion fuel, would be kind of a waste to use it for cooling telescopes...

Did you do it correctly? I'm sure the process was documented...somewhere, it's unintuitive. You have to hit "shutdown" from the reactor control window. Reactor status should change to "decay heating", where it produces only 10% power (and you can't use any of it, for some reason) and this slowly decays down to 0% over several days. Then the status chages to "Idle" or something like that. Now go EVA and hit refuel, here you need to have enough fuel to fill up the reactor completely and enough storage for actinides/depleted fuel which you'll be taking out. Finally hit restart from EVA.

See if it helps if you save and load the game when this happens. A similar problem used to occur when you docked or undocked a ship with a nuclear reactor, and this was a workaround. Might be worth a try. As for reactivating nuclear reactors, you need to wait for a few days (so it's status in reactor control goes from "decay heating" to "offline") and then reactivate it from EVA. There's no way to reactivate without live crew.

If I print an OSE storage container on-site, is there any way to switch its storage from the default Materialkits? Like if I forgot to bring a RareMetals box with me.