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[1.12.x] Cryogenic Engines: Liquid Hydrogen and Methane Rockets! (August 13, 2024)


Nertea

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I don't know how much support for the mod is there, but maybe someone can help me figure this out.

Some crafts give me a very bad stutter. Like every second game is freezeing for another second. I have one of this crafts, it's only 40 parts all stock except for the first stage which is 4 H250-32 and Engine plate with 3 MR-420 Methane engines but the stutter is SO bad even on the launchpad. If I launch the craft (which is a pain) it goes that way all the time until the moment I decouple that stage, immediately all the stutter disappears.

Having less cryotanks (for instance) reduces stutter, adding makes it worse. Removing engines also helps but not fully.

Also, that happens not with every craft, some have 100+ parts and it doesn't seem to affect it.

I know it's not much but maybe any help how to debug this issue?

 

UPD: I actually have another question for this one. The only reason I use CryoTanks for this one is because I cannot set Methane for usual Rockomax Jumbo-64, there is only Lqd Hydrogen option. Is that supposed to be that way, i.e. only hydrogen and no Methane for stock tanks?

Edited by Ignalion
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4 hours ago, Ignalion said:

The only reason I use CryoTanks for this one is because I cannot set Methane for usual Rockomax Jumbo-64, there is only Lqd Hydrogen option. Is that supposed to be that way, i.e. only hydrogen and no Methane for stock tanks?

Vanilla KSP does not have methane. But it also doesn't have hydrogen. The only fuel is "liquid fuel", which is presumed to be RP-1 (kerosene). If you have a liquid hydrogen option for your fuel tank, that's coming from a mod.

Edited by mikegarrison
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13 minutes ago, mikegarrison said:

Vanilla KSP does not have methane. But it also doesn't have hydrogen. The only fuel is "liquid fuel", which is presumed to be RP-1 (kerosene). If you have a liquid hydrogen option for your fuel tank, that's coming from a mod.

Mhm, B9PartSwitch, it should be (should it?) the part of this mod. Anyway, I can edit tanks so I guess that's where it from. I can choose Cryogenic but it only has LiquidHidrogen but not Methane...

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17 minutes ago, Ignalion said:

Mhm, B9PartSwitch, it should be (should it?) the part of this mod. Anyway, I can edit tanks so I guess that's where it from. I can choose Cryogenic but it only has LiquidHidrogen but not Methane...

If you are editing the mods, that could be the cause of your issues. All I can say is that I have never had the problem you describe.

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@IgnalionWhich Fuel-Switch-Mods do you have? CryoTanks? InterstellarFuelTanks? RealFuels?
I think your stuttering are coming from another mod oder mod-incompatibility.  A log and/or a modlist would be helpful.

Edited by Cheesecake
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On 7/16/2024 at 2:57 AM, Cheesecake said:

@IgnalionWhich Fuel-Switch-Mods do you have? CryoTanks? InterstellarFuelTanks? RealFuels?
I think your stuttering are coming from another mod oder mod-incompatibility.  A log and/or a modlist would be helpful.

Sure! I have full Nertea setup but I don't think I have any others fuel mods.

Here is CKAN export list:

All Y'All (AllYAll 1:0.11.21)
AT Utils (AT-Utils v1.10.1)
B9 Part Switch (B9PartSwitch v2.20.0)
Background Resources (BackgroundResources 1:v0.18.0.0)
Breaking Ground (BreakingGround-DLC 1.7.1)
Chatterer (Chatterer 0.9.99)
ClickThrough Blocker (ClickThroughBlocker 1:2.1.10.21)
Community Category Kit (CommunityCategoryKit v112.0.1)
Community Resource Pack (CommunityResourcePack v112.0.1)
Community Tech Tree (CommunityTechTree 1:3.4.4)
Community Terrain Texture Pack (CommunityTerrainTexturePack 1:1.0.5)
Configurable Containers (ConfigurableContainers 2.6.2.1)
Contract Configurator (ContractConfigurator v2.9.2.0)
Contract Pack: Exploration Plus (ContractConfigurator-ExplorationPlus 2.0.1)
Contract Pack: Field Research (ContractConfigurator-FieldResearch 1.2.2)
Contract Pack: Tourism Plus (ContractConfigurator-Tourism 1.5.2)
Crew R&R (CrewQueueTwo 1.1.11.4)
Crowd Sourced Science (CrowdSourcedScience v6.1)
Cryo Tanks (CryoTanks 1.6.5)
Cryo Tanks Core (CryoTanks-Core 1.6.5)
Cryogenic Engines (CryoEngines 1:2.0.6)
Custom Barn Kit (CustomBarnKit 1.1.22.0)
Deployable Engines Plugin (DeployableEngines 1.3.1)
Distant Object Enhancement /L (DistantObject v2.1.1.16)
Distant Object Enhancement /L default config (DistantObject-default v2.1.1.16)
Docking Port Alignment Indicator (DockingPortAlignmentIndicator 6.10.0.0)
Dynamic Battery Storage (DynamicBatteryStorage 2:2.2.5.0)
Easy Vessel Switch (EVS) (EasyVesselSwitch 2.3)
Far Future Technologies (FarFutureTechnologies 1.2.0)
Final Frontier (FinalFrontier 1.10.0-3485)
Firespitter (Firespitter v7.17)
Firespitter Core (FirespitterCore v7.17)
Firespitter Resources config (FirespitterResourcesConfig v7.17)
Harmony 2 (Harmony2 2.2.1.0)
Heat Control (HeatControl 0.6.1)
IndicatorLights (IndicatorLights 1.8.3)
Kerbal Atomics (KerbalAtomics 1:1.3.3)
Kerbal Attachment System (KAS 1.12)
Kerbal Inventory System (KIS 1.29)
Kopernicus Planetary System Modifier (Kopernicus 2:release-1.12.1-205)
KSP Community Fixes (KSPCommunityFixes 1.35.2)
Making History (MakingHistory-DLC 1.12.1)
ModularFlightIntegrator (ModularFlightIntegrator 1.2.10.0)
Module Manager (ModuleManager 4.2.3)
Near Future Construction (NearFutureConstruction 1.3.1)
Near Future Electrical (NearFutureElectrical 1.2.3)
Near Future Electrical Core (NearFutureElectrical-Core 1.2.3)
Near Future Exploration (NearFutureExploration 1.1.2)
Near Future IVA Props (NearFutureProps 1:0.7.1)
Near Future Launch Vehicles (NearFutureLaunchVehicles 2.2.0)
Near Future Propulsion (NearFuturePropulsion 1.3.5)
Near Future Solar (NearFutureSolar 1.3.2)
Near Future Solar Core (NearFutureSolar-Core 1.3.2)
Near Future Spacecraft (NearFutureSpacecraft 1.4.3)
Outer Planets Mod (OuterPlanetsMod 2:2.2.10)
Outer Planets Mod - Parallax with Scatters (Parallax-OuterPlanetsMod v1.0.5)
Parallax (Parallax 2.0.6)
Parallax - Stock Planet Textures (Parallax-StockTextures 2.0.0)
Parallax - Stock Scatter Textures (Parallax-StockScatterTextures 2.0.1)
PlanetShine (PlanetShine 0.2.6.6)
PlanetShine - Default configuration (PlanetShine-Config-Default 0.2.6.6)
Precise Maneuver (PM) by Morse (PreciseManeuver 2:2.4.99.0-adoption)
RasterPropMonitor (RasterPropMonitor 1:v0.31.13.4)
RasterPropMonitor Core (RasterPropMonitor-Core 1:v0.31.13.4)
Real Plume (RealPlume 2:v13.3.2)
Real Plume - Stock Configs (RealPlume-StockConfigs v4.0.8)
ReStock (ReStock 1.4.5)
ReStock Extra - Rigid Legs (RestockRigidLegs 1.4.5)
Restock Waterfall Expansion (RestockWaterfallExpansion 3.1.0)
ReStock+ (ReStockPlus 1.4.5)
RSMP (SRBWaterfallEffects 2:4.0.1)
SCANsat (SCANsat v20.4)
Scatterer (Scatterer 3:v0.0876)
Scatterer Default Config (Scatterer-config 3:v0.0876)
Scatterer Sunflare (Scatterer-sunflare 3:v0.0876)
SmokeScreen - Extended FX Plugin (SmokeScreen 2.8.14.0)
Space Dust (SpaceDust 0.4.4)
SpaceTux Library (SpaceTuxLibrary 0.0.8.6)
Stockalike Mining Extension (StockalikeMiningExtension 1.1.6)
Stockalike Station Parts Expansion Redux (StationPartsExpansionRedux 2.0.10)
Stockalike Station Parts Expansion Redux - Internal Spaces (StationPartsExpansionRedux-IVAs 2.0.10)
System Heat (SystemHeat 0.6.0)
System Heat - Nuclear Engine Configuration (SystemHeat-FissionEngines 0.6.0)
System Heat - Nuclear Reactor Configuration (SystemHeat-FissionReactors 0.6.0)
System Heat - Resource Converter Configuration (SystemHeat-Converters 0.6.0)
System Heat - Resource Harvester Configuration (SystemHeat-Harvesters 0.6.0)
TAC Life Support (TACLS) (TACLS 1:v0.18.0.0)
TextureReplacer (TextureReplacer v4.5.3)
Toolbar (Toolbar 1:1.8.1.1)
Toolbar Controller (ToolbarController 1:0.1.9.11)
Waterfall - Restock (WaterfallRestock 0.2.3)
Waterfall Core (Waterfall 0.9.0)
WaypointManager (WaypointManager 2.8.4.2)

 

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  • 1 month later...

Released 2.0.7

  • Updated CryoTanks to 1.6.6
  • Updated ModuleManager to 4.2.3
  • Updated DynamicBatteryStorage to 2.3.1
  • Updated B9PartSwitch to 2.20.0
  • Bumped KSP versioning
  • Fixed incorrect title for Iguanodon 1.875m variant
  • Add support for VABOrganizer
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  • 1 month later...

I love Cryogenic Engines, but i have a proposition for a minor modification.

I also have CryoEngines Extensions and the mods work good together except for one tiny thing.

The Sustainer Hydrolox Engine "Etna" have a worst vacuum  ISP (410) than the Booster Hydrolox Engine Kunlun (412), which is also lighter.

So there is no real reason to use the Etna over the Kunlun. Should we raise the Etna ISP a bit , maybe to 420 (still less than Fuji, but more than Kunlun and Arso)?

 

Spoiler

bG5x15S.png

 

Edited by urturino
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57 minutes ago, urturino said:

I love Cryogenic Engines, but i have a proposition for a minor modification.

I also have CryoEngines Extensions and the mods work good together except for one tiny thing.

The Sustainer Hydrolox Engine "Etna" have a worst vacuum  ISP (410) than the Booster Hydrolox Engine Kunlun (412), which is also lighter.

So there is no real reason to use the Etna over the Kunlun. Should we raise the Etna ISP a bit , maybe to 420 (still less than Fuji, but more than Kunlun and Arso)?

 

  Hide contents

bG5x15S.png

 

Since the Kunlun comes with CryoEngines Extension, this should be adapted rather than the other way around.
But the Etna has a different role than the Kunlun.
The Kunlun is intended more for a conventional rocket, as it produces quite a lot of thrust at a low weight. The first rocket stage is dropped relatively early here. Therefore, the Isp in the atmo is higher here than with the Etna and the T/W ratio is also much better. A relatively powerful upper stage is also required here to get the payload into orbit.


The Etna is used more like the Delta IV or Ariana 5/6 and has a rather poor T/W ratio. In most cases, boosters are required to support the launch. However, it should run as long as possible, while the upper stages are usually not as powerful. The first stage then brings the payload into orbit almost on its own, or at least to a very high orbit, where the weaker upper stage (as mentioned above), which then usually has a higher ISP and burn time, then has enough time to bring the payload to the desired orbit.


For comparison:
Delta IV
Thrust of the first stage: 3140kn
Burn time: 245s
Thrust of the second stage: 110kn
Isp: 462
Burn time: 850-1125s

Falcon 9:Thrust of the first stage: 7600kn
Burn time: 162s
Thrust of the second stage: 934kn
Isp: 348
Burn time: 397s

Source: Wikipedia

Edited by Cheesecake
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  • 1 month later...

Good day! I would like to inquire if you have any plans to add engines and an external air cooler similar to the HOTOL liquid air cycle engine, such as the Rolls-Royce RB545. Additionally, I am interested in a cooler for incoming air for further use as an oxidizer. Would you consider incorporating these technologies into your projects?

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