Pumped Liquid Engine

Kit (Pumped Liquid Engine)

Fabrication
Created with	Autolathe (Tier One)
Cost	60000 Energy, 15g Steel, 5g Electrum, 10g Constantan
Temperature
Flashpoint	373K (100°C)
Autoignition	573K (300°C)
Other properties
Paintable	Yes
Stack Size	1
Prefabs
Prefab Hash	1921918951
Prefab Name	ItemKitPumpedLiquidEngine

Pumped Liquid Engine

Operation
Base Power Usage	200W
Contruction
Total cost	2,5g Iron, 17g Steel, 5g Electrum, 10g Constantan
Constructed from	Kit (Pumped Liquid Engine)
Other properties
Paintable	Yes
Prefabs
Prefab Hash	-23091440019
Prefab Name	StructurePumpedLiquidEngine

Description

"Liquid propellants bring greater efficiencies with Pumped Liquid Engine. Two inputs are provided so Stationeers can seperate their fuels, the Setting variable controls the mixing ratio of the inputs. The engine is designed to run on Liquid Volatiles and Liquid Oxygen, some Stationeers have reported excessive thrust values by switching to Liquid Nitrous Oxide."
- Stationpedia

Comparison

Rocket Engines give you their max output in kN with this you can calculate what they can reasonably carry into orbit depending on the planet or moon you are on. Force = Mass * Acceleration. Acceleration is equal to the planet's gravity, Mass is given in kg per part of the rocket, and Force is kN. If your thrust force listed below is less than the weight of the rocket in kN then you will not even take off. It is better to have a thrust much higher than the weight of the rocket or else you risk running out of fuel on launch and on landing.

Liquid propellants bring greater efficiencies. Using Nitrous Oxide as oxidizer provides excessive thrust values. Keep in mind that N2O fuel mix is 1.9375 times heavier at same moles, or 2.15 times heavier at same volume, while thrust boost is around 1.5-1.7. Engine efficiency determines "bonus" thrust multiplier, meaning engine with higher efficiency will give more thrust consuming same amount of fuel. Thus using liquid engines is more favorable if one can cool fuel down, moreover Pressure Fed Engines consume fuel inversely proportional to its temperature. On the other hand if Volatiles and Oxygen are in excess (e.g. farm on Vulcan) is may be much easier to opt for Pressure Fed Gas Engine. It will provide ~40kN at 20°C.

Name	Power Usage, W	Rocket Mass Contribution, kg	Formal Max Thrust, kN	Tested Max Thrust, kN		Propellant consumption, mol/tick		Efficiency, %	Exhaust Velocity, km/s	Specifc Index Isp, s
				Using O2	Using N2O	Using O2	Using N2O
Pumped Gas Engine	200	500	16.20	16.54	24.47	18.00	18.00	100	4.02	411
Pumped Liquid Engine	200	500	17.90	18.74	31.25	15.00	16.66	140	5.56	568
Pressure Fed Gas Engine	10	500	40.30	60.32	41.57	69.77	31.68	96	3.86	394
Pressure Fed Liquid Engine	20	500	29.30	38.84	59.70	27.23	28.16	160	6.31	644
Heavy Pressure Fed Gas Engine	10	750	62.60	93.87	64.75	118.45	53.83	88	3.54	361
Heavy Pressure Fed Liquid Engine	20	750	44.30	60.39	95.52	47.03	49.86	144	5.68	579
Update 0.2.6136.26812 - 01/28/2026 Rocket_Engines