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S3 KS-25x4 Engine Cluster

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S3 KS-25x4 Engine Cluster
Part image
Liquid fuel engine by
Kerbodyne
Radial size Extra large
Cost (total) 32 400.00 Fund
Mass (total) 9.75 t
Drag 0.2
Max. Temp. 3600 K
Impact Tolerance 20 m/s
Research Tech tree very heavy rocketry.png Very Heavy Rocketry
Unlock cost 65000 Fund
Since version 0.23.5
Part configuration Size3EngineCluster
Maximum thrust 3200 kN
Isp (1 atm) 320 s
(vacuum) 360 s
Fuel con­sumption (1 atm) 203.67 Jerry-can char.svg/s
(vacuum) 181.04 Jerry-can char.svg/s
Thrust vectoring 0.5 °
On the surface ✓ Yes
On the ocean ✓ Yes
In atmosphere ✓ Yes
In space ✓ Yes
Test by staging ✓ Yes
Manually testable ✓ Yes

The S3 KS-25x4 Engine Cluster is a liquid fuel engine with four nozzles. This is the engine with the highest thrust and, compared to the thrust, high specific impulse. It doesn't allow placing additional stages beneath the engine cluster. This is the second liquid fuelled engine after the R.A.P.I.E.R. Engine which uses multiple nozzles.

The KS-25 might be a reference to the Space Shuttle Main Engines which are also named RS-25, especially as it was introduced as a Space Launch System component which uses four RS-25 engines.

It is the most expensive part in the game.

Product description

Designed for usage as a first stage, this engine uses four of Kerbodyne's KS-25 rocket motors. This is the first in a series of designs that move away from the pattern of simply increasing the engine and nozzle size on a rocket.

Changes

0.24
  • Cost increased from 5900 to 32400 (and made meaningful)
0.23.5
  • Initial release
Default parts
Jet engines Basic Jet EngineTurboJet EngineR.A.P.I.E.R. Engine
Liquid fuel tanks Oscar-B Fuel TankROUND-8 Toroidal Fuel TankFL-T100 Fuel TankFL-T200 Fuel TankFL-T400 Fuel TankFL-T800 Fuel TankRockomax X200-8 Fuel TankRockomax X200-16 Fuel TankRockomax X200-32 Fuel TankRockomax Jumbo-64 Fuel TankKerbodyne S3-3600 TankKerbodyne S3-7200 TankKerbodyne S3-14400 Tank
Liquid fuel engines LV-1 Liquid Fuel EngineLV-1R Liquid Fuel EngineRockomax 24-77Rockomax 48-7SRockomax Mark 55 Radial Mount Liquid EngineToroidal Aerospike RocketLV-N Atomic Rocket MotorLV-909 Liquid Fuel EngineLV-T45 Liquid Fuel EngineLV-T30 Liquid Fuel EngineRockomax "Poodle" Liquid EngineRockomax "Skipper" Liquid EngineRockomax "Mainsail" Liquid EngineR.A.P.I.E.R. EngineKerbodyne KR-2L Advanced EngineLFB KR-1x2S3 KS-25x4 Engine Cluster
Solid fuel rockets Sepratron IRT-10 Solid Fuel BoosterRockomax BACC Solid Fuel BoosterS1 SRB-KD25k
Monopropellant fuel tanks Stratus-V Cylindrified Monopropellant TankStratus-V Roundified Monopropellant TankFL-R1 RCS Fuel TankFL-R10 RCS Fuel TankFL-R25 RCS Fuel TankMk2 Monopropellant TankMk3 Monopropellant Tank
Monopropellant engines O-10 MonoPropellant Engine
Jet fuselages Mk1 Fuselage - Jet FuelMk2 to size 1 AdapterMk2 FuselageMk3 to Mk2 AdapterMk3 Fuselage
Fuel transfer FTX-2 External Fuel Duct