48-7S "Spark" Liquid Fuel Engine

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48-7S "Spark" Liquid Fuel Engine
Part image
Liquid fuel engine by
Rockomax Conglomerate
Radial size Tiny
Cost (total) 240.00 Funds
Mass (total) 0.13 t
Drag 0.2
Max. Temp. 2000 K
Impact Tolerance 7 m/s
Research Propulsion systems.png Propulsion Systems
Unlock cost 2 800 Funds
Since version 0.21
Part configuration liquidEngine48-7S
Liquid fuel engine
Maximum thrust (1 atm) 16.56 kN
(vacuum) 20.00 kN
Isp (1 atm) 265 s
(vacuum) 320 s
Fuel consumption 1.27 Units of fuel/s

Thrust vectoring 3 °
Testing Environments
On the surface ✓ Yes
In the ocean ✓ Yes
On the launchpad ✓ Yes
In the atmosphere ✓ Yes
Sub orbital ✓ Yes
In an orbit ✓ Yes
On an escape ✓ Yes
Docked × No
Test by staging ✓ Yes
Manually testable ✓ Yes

Originally from the KSPX parts mod, the Rockomax 48-7S is the non radial version of the Rockomax 24-77.


Like the 24-77, LV-1, and LV-1R, the 48-7S is intended to propel probes and small crewed craft, using light weight command pods and small fuel tanks large amounts of delta v can be achieved with little mass. Due to its relatively high Isp and thrust to weight ratio, the 48-7S is remarkably capable in ascent, transfer, and lander roles. Its thrust to weight ratio is second only to the Kerbodyne KR-2L Advanced Engine and the S3 KS-25x4 Engine Cluster.

It also has thrust vectoring, unlike its radially attached counterpart, the Rockomax 24-77, allowing for greater control.

Product description

A cousin of the 24-77, the 48-7S is a stack mounted probe engine that packs quite a punch.
The 48-7S may be small, but it packs quite a punch for its size. This little engine is a testament to how larger does not always means more advanced, at least according to Rockomax's marketing department. The box it comes in is pretty cool, in any case.

Rockomax Conglomerate, 0.22


  • Thrust increased from 20 to 30 kN, description changed.
  • Initial release