24-77 "Twitch" Liquid Fuel Engine

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24-77 "Twitch" Liquid Fuel Engine
Part image
Liquid fuel engine by
Rockomax Conglomerate
Radial size Radial mounted
Cost (total) 230.00 Funds
Mass (total) 0.08 t
Drag 0.2
Max. Temp. 2000 K
Impact Tolerance 7 m/s
Research Precision propulsion.png Precision Propulsion
Unlock cost 920 Funds
Since version 0.18
Part configuration liquidEngine24-77
Liquid fuel engine
Maximum thrust (1 atm) 15.17 kN
(vacuum) 16.00 kN
Isp (1 atm) 275 s
(vacuum) 290 s
Fuel consumption 1.13 Units of fuel/s

Thrust vectoring 8 °
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

The 24-77 "Twitch" Liquid Fuel Engine is used to provide thrust to a rocket. It is great for small probe landers because it has a great thrust-to-weight ratio. While it can be radially attached without a structural part and can be used to fit landing legs, it has the downside of being less powerful and efficient than the 48-7S "Spark" Liquid Fuel Engine but is 10 kg lighter.

Product description

Tiny engine! But very useful, good for craft where larger radial engines won't fit. Although, you may need more of them to lift larger payloads.


As of version 1.7 this engine has two textures that can be switched in the editor.

Shroud variant
TrussMount variant
The different variants of the engine


  • Mass decreased from 0.09 to 0.08
  • Atmospehric Isp increased from 270 to 275
  • New model and texture
  • Added Gray and Orange variant
  • entryCost decreased from 3000 to 920
  • Cost decreased cost from 400 to 230
  • Atmospehric Isp increased from 250 to 270
  • Cost increased from 240 to 480 (and made meaningful)
  • Initial Release