Cryogenic Engines

License: CC-BY-NC-SA-4.0

Game Version: 1.7.0

Downloads: 246,978

Author: Nertea

Mod Website: Forum Thread

Followers: 392

Outdated Mod

This mod is not known to work with the latest version of Kerbal Space Program. Proceed with caution.

Information Changelog Stats

This modest part pack is designed to provide some new rocket engines that run on Liquid Hydrogen and Oxidizer. There are six models provided, two in each of the 1.25, 2.5 and 3.75m sizes. These engines have better fuel efficiency than the KSP stock engines, up to 455s, but beware! They're more expensive and produce less thrust per unit weight. In addition, liquid hydrogen is less dense than liquid fuel, so for the same Delta-V, you will need more tank volume.

To store your liquid hydrogen fuels, I've provided ModuleManager/B9PartSwitch configs that allow you to change the contents of stock tanks between LF/O, LH2/O, LF, O and LH2. These should work with most mod tanks, but no promises. However, Liquid Hydrogen is very temperamental and without the proper storage it will slowly evaporate ("boil off"). Therefore, I provide special cryogenic tanks bundled with the mod, that use a small amount of Electric Charge to stop the evaporation.

This mod is designed to synergize well with Kerbal Atomics 0.2.0+, and with the various Near Future Technologies mods I make.

Version 0.6.6 for Kerbal Space Program 1.7.0

Released on 2019-04-23

  • KSP 1.7.x
  • Updated ModuleManager to 4.0.2
  • Updated CryoTanks to 1.1.1
  • Updated B9PartSwitch to 2.7.0
  • Updated DynamicBatteryStorage to 1.4.2
  • Updated DeployableEngines to 1.0.1


Version 0.6.5 for Kerbal Space Program 1.6.1

Released on 2019-01-21

  • Updated CryoTanks to 1.1.1
  • Improved German translation from Three_Pounds


Version 0.6.4 for Kerbal Space Program 1.6.1

Released on 2019-01-17

  • KSP 1.6.x
  • Updated ModuleManager to 3.1.3
  • Updated CryoTanks to 1.1.0
  • Updated B9PartSwitch to 2.6.0
  • Updated DynamicBatteryStorage to 1.4.0
  • Updated DeployableEngines to 1.0.0
  • Minor change to licensing of code/configs (MIT now)
  • Fixed EngineLight patch (thanks Nightside101010)
  • Renamed CryoEnginesMarkIV to CryoEnginesNFAero for accuracy


Version 0.6.3 for Kerbal Space Program 1.5.1

Released on 2018-11-05

* Updated CryoTanks to 1.0.3 * Updated B9PartSwitch to 2.4.5 * Removed MiniAVC distribution


Version 0.6.2 for Kerbal Space Program 1.5.1

Released on 2018-10-25

  • KSP 1.5.1
  • Updated B9PartSwitch to 2.4.4
  • Updated MM to 3.1.0
  • Updated DynamicBatteryStorage to 1.3.3
  • Updated CRP to 1.0.0
  • Updated MiniAVC to
  • Updated CryoTanks to 1.0.2


Version 0.6.1 for Kerbal Space Program 1.4.4

Released on 2018-08-07

Updated B9PartSwitch to 2.3.3  Updated MM to 3.0.7  Updated DynamicBatteryStorage to 1.3.2  All engines now surface attachable by default  Removed Extras surface attach patch  Updated CryoTanks to 1.0.1  Changed omni-tank patch to run AFTER several other mods that also omni patch.


Version 0.6.0 for Kerbal Space Program 1.4.2

Released on 2018-04-11

  • KSP 1.4.2
  • Updated bundled B9PartSwitch to 2.2.1
  • Updated MM to 3.0.6
  • Updated CRP to 0.10.0
  • Updated MiniAVC to
  • Updated DynamicBatteryStorage to 1.3.0
  • Recompiled DeployableEngines
  • Added engine nicknames to tags
  • Decreased mass of Volcano to 1.3 from 1.6t (TWR to 16.4/18 from 13.4/14.6)
  • Decreased mass of Chelyabinsk to 0.55t from 0.7 (TWR to 3.1/10.2 from 2.4/8)
  • Decreased mass of Odin to 5 to 5.75t (TWR to 19.6/21.4 from 17.1/18.6)
  • Decreased mass of Tunguska to 2.25 from 2.75t (TWR to 5.2/12.5 from 4.2/10.2)
  • Decreased mass of Mars to 11.5 from 12.5t (TWR to 20.7/23.5 from 19.0/21.6)
  • Increased thrust of Yucutan to 1850 from 1450 kN (TWR to 12.0/21.8 from 9.4/17.1)
  • Moved Odin to Heavier Rocketry
  • Updated CryoTanks to 1.0.0
  • Fixed boiloff being disabled if a tank's fuel was disabled
  • Fixed boiloff rates being calculated incorrectly at timewarp
  • Redid all tank textures, particularly foils
  • Added 3 new tank models
  • Short 2.5m (standard, compact variants)
  • Short 3.75m (standard, compact, bare variants)
  • Short 5m (standard, compact, bare variants)
  • Fixed attach nodes of 3.75m compact tank variants
  • Rebalanced capacities, masses and costs of all tanks
  • Decreased cooling cost of ZBO tanks to 0.05 Ec/1000u
  • Added an optional ability to specify a set of OUTPUT_RESOURCE blocks in a BOILOFFCONFIG. This causes boiloff to produce that resource with the specified ratio and flow mode. See Config Documentation section
  • Added the optional ability to specify boiloff as dependent on solar/planetary radiation input. See Config Documentation section


Version 0.5.11 for Kerbal Space Program 1.3.1

Released on 2017-12-15

Updated MM to 3.0.1  Updated B9PartSwitch to 2.1.0  Updated CryoTanks to 0.4.9  Deconflict new WBI fuel switcher


Version 0.5.10 for Kerbal Space Program 1.3.1

Released on 2017-11-28

*Updated DynamicBatteryStorage to 1.2.0 * Fixed a bug that caused the buffer to be destroyed every second time it was created * Fixed solar panel handling when Kopernicus is installed


Version 0.5.9 for Kerbal Space Program 1.3.1

Released on 2017-10-17

KSP 1.3.1  Dependency updates  CryoTanks 0.4.8  Tanks no longer use up all EC


Version 0.5.8 for Kerbal Space Program 1.3.0

Released on 2017-08-01

* CryoTanks 0.4.7: Fixed an issue where parts with '_' in their name would not be patched properly


Version 0.5.7 for Kerbal Space Program 1.3.0

Released on 2017-07-31

Cryo Engines 0.5.7

* Fixed normals on all engines  *  CryoTanks 0.4.6  *  All tanks can now be cooled. Lifting tanks cast ~10% more to cool and have cooling disabled by default  *  Repaired normals on tanks  *  Fixed science costs of many tanks  * Refactored plugin to support multiple cryogenic fuels per tank  * Updates to MFT Compatibility  * DynamicBatteryStorage 1.1.0  * Refactored plugin for many improvements  * Proper support for RealBattery


Version 0.5.6 for Kerbal Space Program 1.3.0

Released on 2017-07-12

* CryoTanks 0.4.5 * Added Russian translation from vladmir_v * Fixed a typo in the version file * Fixed 5m tanks throwing a B9PartSwitch warning on placement in the VAB * Fixed 3.75m tanks having collider issues * Adjusted the position of the nodes for the compact variants of 3.75m tanks * Fixed low cost of 5m hydrogen tanks * Fixed slightly off cost of 10m hydrogen tank


Version 0.5.5 for Kerbal Space Program 1.3.0

Released on 2017-07-05

Updated bundled B9PartSwitch to 1.9.0 Updated bundled MM to 2.8.1 CryoTanks 0.4.4  Fixed dry mass of LH2-only ZBO tanks


Version 0.5.4 for Kerbal Space Program 1.3.0

Released on 2017-06-30

Hotfix paths


Version 0.5.3 for Kerbal Space Program 1.3.0

Released on 2017-06-30

  • Added Spanish translation courtesy of fitiales
  • Added Russian, French, Japanese, Chinese, German translations courtesy of Next_Star_Industries
  • CryoTanks 0.4.3 * Added Spanish translation courtesy of fitiales * Updated DynamicBatteryStorage to 1.0.1 * Reduced logging * Fixed an issue with generator parsing on ModuleResourceConverters


Version 0.5.2 for Kerbal Space Program 1.3.0

Released on 2017-06-26

  • Updated B9PartSwitch to version 1.8.1
  • CryoTanks 0.4.2
  • Fix incorrectly exported model for small 2.5m hydrogen tank
  • Fix doubled dry mass of all hydrogen-containing tanks


Version 0.5.1 for Kerbal Space Program 1.3.0

Released on 2017-06-20

  • CryoTanks 0.4.1
  • Fixed volumes and descriptions of 5m hydrogen tanks
  • Normalized specular exponents and normal map depths on all tanks
  • Fixed a mesh duplication issue on 3.75m tanks
  • Reduced instances of distorted tanget normal map seams on all tanks, where I couldn't fix it I've covered the worst instances with 'intentional' seams
  • Restructured UV of 5m tanks to reduce tangent seam frequency


Version 0.5.0 for Kerbal Space Program 1.3.0

Released on 2017-06-16

  • KSP 1.3
  • Updated MM to 2.8.0
  • Updated B9PartSwitch to 1.8.0
  • Updated CRP to 0.7.1
  • Updated MiniAVC to
  • Setup parts to use KSP 1.3 localization
  • Renamed a few engines for consistency and VAB location
  • Fixed incorrect layer for most engine FX
  • Changed heat animations to use Throttle method (as in Kerbal Atomics)
  • Updated heat production values of engines, tied primarily to engine total power now
  • Adjusted IntakeAir consumption of Cutlass engine in LH2 patch
  • Significant improvements to CryoTanks package
  • Now versioned (Version 0.4.0)
  • Normalized LH2 tank mass ratios to 5 (from ~3.5), this affects all tanks containing LH2 or LH2/OX
  • Normalized naming scheme for ZBO tanks to reflect their capacities
  • Reworked tank capacities  * Improved fuel switching patch to account for more exceptions  * New 5m tank models (15m and 7.5m lengths)
  • Deprecated 3.75m length tank variant for 3.75m inline tanks (temporary)
  • Reworked models and textures for all fuel tanks
  • New structureless variants for all inline tanks
  • Optimized SimpleBoiloff plugin
  • Cooling functions can now be disabled in the VAB
  • Reduced the scope of the SimpleBoiloff plugin, most advanced functions are now part of DynamicBatteryStorage
  • New sub-plugin: DynamicBatteryStorage
  • Dynamically adjusts EC storage to combat KSP crap resource mechanics at high timewarp
  • Should dramatically reduce instances of EC loss at high timewarp


Version 0.4.6 for Kerbal Space Program 1.2.2

Released on 2017-03-03

* Updated bundled B9PartSwitch to 1.7.1 * Updated CRP to 0.6.6 * Updated AVC link * Added description to VL-1 Volcano * Fixed incorrect naming of normal maps for 3.75m engines * Fixed a boiloff issue that could occur when switching ships that were close to each other


Version 0.4.5 for Kerbal Space Program 1.2.2

Released on 2017-01-23

  • Marked for KSP 1.2.2
  • Updated bundled MM to 2.7.5
  • Updated bundled B9PartSwitch to 1.5.3
  • Updated bundled CRP to 0.6.4
  • Updated DeployableEngines to 2.1.0


Version 0.4.3 for Kerbal Space Program 1.2.1

Released on 2016-11-18

  • Marked for KSP 1.2.1
  • Updated MM to 2.7.4
  • Updated CRP to 0.6.3
  • KPBS ISRU now produces LH2 (thanks Wyzard256)


Version 0.4.2 for Kerbal Space Program 1.2

Released on 2016-10-27

  • Updated CRP to 6.0.1
  • Fixed exceptions in VAB when using a ZBO tank for holding only non-cryo fuels
  • Fixed incorrect dry masses for ZBO tanks
  • Decreased cost and research cost of all engines to be more like 1.15-1.25x their LFO equivalents


Version 0.4.1 for Kerbal Space Program 1.2

Released on 2016-10-21

Fix inclusion of bad dlls


Version 0.4.0 for Kerbal Space Program 1.2

Released on 2016-10-21

KSP 1.2 Updated bundled MM Updated bundled CRP Updated bundled B9PartSwitch Updated DeployableEngines Reexported engine FX to fix interaction with atmospheric/highlight FX Changed naming of engine variants New colliders for engine variants to more accurately represent their structures CryoTanks: General functionality improvements  Tank real power usage is now shown in the info box  Right clicking on a tank in the VAB now displays its power usage  New analytics mode that runs at 1000x time warp and up which should do a much better job of calculating boiloff  Lifting and ZBO tanks now have the same mass ratio  ZBO tanks have a new alternate model that can be selected


Version 0.3.6 for Kerbal Space Program 1.1.3

Released on 2016-09-01

  • Fixed bug that caused propellant to keep boiling off even if power was restored


Version 0.3.5 for Kerbal Space Program 1.1.3

Released on 2016-06-28

Re-added missing MM dll.


Version 0.3.4 for Kerbal Space Program 1.1.3

Released on 2016-06-28

Fix mistakenly bundled dlls


Version 0.3.3 for Kerbal Space Program 1.1.3

Released on 2016-06-27

KSP 1.1.3  Updated bundled CRP Updated bundled DeployableEngines Updated bundled MM Updated bundled B9PartSwitch  Fixed several bugs related to CryoTanks boiloff


Version 0.3.2 for Kerbal Space Program 1.1.2

Released on 2016-05-18

No changelog provided


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