Difference between revisions of "Liquid fuel"

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'''Liquid fuel''' is a [[resource]] used to power various engines. It is commonly stored in [[liquid fuel tank]]s or fuselages.
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{{:Liquid fuel/Box}}
  
== Containers ==
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'''Liquid fuel''', sometimes called '''jet fuel''', is a [[resource]] used to power an [[engine]], used either in conjunction with [[oxidizer]], or [[intake air]], depending on the engine type. It is stored in [[liquid fuel tank]]s or fuselages. Because jet engines use this fuel too, it is sometimes called jet fuel, but there is no difference between both fuels.
Liquid fuel can be pumped automatically from a fuel tank to another fuel tank or engine connected via an [[FTX-2 External Fuel Duct]]. Fuel ducts aren't necessary when the components are directly adjacent or stacked on top of each other. When fuel tanks are not connected, it is still possible to transfer fuel between them manually by alt-clicking on two of them in staging view.
 
  
Fuselages only contain liquid fuel and liquid fuel tanks also contain [[oxidizer]] in the correct ratio.
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== Associated container and engine types ==
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Rocket fuel tanks contain both liquid fuel and oxidizer, while fuselages contain only liquid fuel. [[Liquid fuel engine|Rocket engines]] using liquid fuel and oxidizer, use a volumetric mixture of 9 units of liquid fuel per 11 units of [[oxidizer]]. All rocket fuel tanks store liquid fuel and oxidizer in this ratio. [[Jet engine]]s use intake air in a volumetric mixture of 1 unit of liquid fuel per 15 units of intake air. Because all three resources have the same density, the volumetric ratio is also the mass ratio.
  
== Associated engines ==
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== Flow and transfer ==
[[Jet engine]]s need both liquid fuel and intake air to run. Liquid fuelled [[rocket engine]]s run on a mixture of liquid Fuel and oxidizer
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Liquid fuel's [[Resource#Flow modes|flow mode]] is adjacent. With the use of an [[FTX-2 External Fuel Duct]] non-adjacent tanks can be linked. Even without a fuel duct it is still possible to [[Fuel transfer|transfer fuel]] between them manually.
  
[[Category:Resources]]
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Since [[1.9]], liquid fuel can also be drained from tanks using the [[FTE-1 Drain Valve]].
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== Real world equivalent ==
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Although the official equivalent is unknown, some compare liquid fuel to [[w:RP-1|RP-1]], a kerosene usually used in the first stages of a rocket. Both RP-1 and liquid fuel can be stored at room temperature without boiling off. But the mass mixture ratio of RP-1 and liquid oxygen, the common oxidizer for RP-1, is usually above 2 units of oxidizer per unit of RP-1 higher than the 1.22 for liquid fuel and oxidizer.<ref>[http://www.b14643.de/Spacerockets_1/Diverse/Russian_Rocket_engines/engines.htm Russian/Ukrainian space-rocket and missile liquid-propellant engines]</ref><ref>[http://www.b14643.de/Spacerockets_2/Diverse/U.S._Rocket_engines/engines.htm U.S. space-rocket liquid propellant engines]</ref>
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== See also ==
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* {{Wikipedia|Liquid rocket propellants}}
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== Changes ==
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;[[1.9]]
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* Resource is now drainable
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;[[1.2.2]]
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* Added display name
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;[[1.2]]
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* Added abbreviation (used in [[KerbNet]])
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;[[1.1]]
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* Added volume
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;[[1.0]]
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* Added hsp value (heat capacity)
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;[[0.24]]
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* Added cost
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;[[0.23]]
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* Resource is now tweakable in the VAB/SPH
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;[[0.18]]
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* Initial release
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== References ==
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<references/>
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{{Resources}}

Revision as of 23:36, 27 July 2021

Liquid fuel
Density 5 kg/l
Transferable Yes
Tweakable Yes
Drainable Yes
Flow mode Adjacent
Cost 0.8 Funds/l
0.16 Funds/kg
Since version 0.18

Liquid fuel, sometimes called jet fuel, is a resource used to power an engine, used either in conjunction with oxidizer, or intake air, depending on the engine type. It is stored in liquid fuel tanks or fuselages. Because jet engines use this fuel too, it is sometimes called jet fuel, but there is no difference between both fuels.

Associated container and engine types

Rocket fuel tanks contain both liquid fuel and oxidizer, while fuselages contain only liquid fuel. Rocket engines using liquid fuel and oxidizer, use a volumetric mixture of 9 units of liquid fuel per 11 units of oxidizer. All rocket fuel tanks store liquid fuel and oxidizer in this ratio. Jet engines use intake air in a volumetric mixture of 1 unit of liquid fuel per 15 units of intake air. Because all three resources have the same density, the volumetric ratio is also the mass ratio.

Flow and transfer

Liquid fuel's flow mode is adjacent. With the use of an FTX-2 External Fuel Duct non-adjacent tanks can be linked. Even without a fuel duct it is still possible to transfer fuel between them manually.

Since 1.9, liquid fuel can also be drained from tanks using the FTE-1 Drain Valve.

Real world equivalent

Although the official equivalent is unknown, some compare liquid fuel to RP-1, a kerosene usually used in the first stages of a rocket. Both RP-1 and liquid fuel can be stored at room temperature without boiling off. But the mass mixture ratio of RP-1 and liquid oxygen, the common oxidizer for RP-1, is usually above 2 units of oxidizer per unit of RP-1 higher than the 1.22 for liquid fuel and oxidizer.[1][2]

See also

Changes

1.9
  • Resource is now drainable
1.2.2
  • Added display name
1.2
  • Added abbreviation (used in KerbNet)
1.1
  • Added volume
1.0
  • Added hsp value (heat capacity)
0.24
  • Added cost
0.23
  • Resource is now tweakable in the VAB/SPH
0.18
  • Initial release

References

  1. Russian/Ukrainian space-rocket and missile liquid-propellant engines
  2. U.S. space-rocket liquid propellant engines