LV-TX87 "Bobcat" Liquid Fuel Engine

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LV-TX87 "Bobcat" Liquid Fuel Engine
Part image
Liquid fuel engine by
Jebediah Kerman's Junkyard and Spacecraft Parts Co

Radial size Medium
Cost (total) 2 000.00 Funds
Mass (total) 2.00 t
Drag 0.2-0.3
Max. Temp. 2000 K
Volume  ?
Impact Tolerance 12 m/s
Research Tech tree heavy rocketry.png Heavy Rocketry
Unlock cost 8 000 Funds
Since version 1.4.1
Part configuration LiquidEngineLV-TX87.cfg
Maximum thrust (1 atm) 374.19 kN
(vacuum) 400.00 kN
Isp (1 atm) 290 s
(vacuum) 310 s
Fuel consumption 26.32 Units of fuel/s

Thrust vectoring 5 °

The LV-TX87 "Bobcat" Liquid Fuel Engine is the highest-thrust medium-sized engine.


The Bobcat has a specific impulse of 290s in atmosphere. Only four other engines meet or exceed this, and all of them come at level 8 of the tech tree, while the Bobcat appears much earlier at level 5. It also has a good thrust-to-weight ratio, and its cost is exceptionally low for the thrust it produces. This makes it effective for first stages and well worth using for medium size rockets.

Unlike the double bell version of the RE-L10 "Poodle" Liquid Fuel Engine, the Bobcat's two engine bells can gimbal separately, allowing the engine to provide roll control. Additionally, the gimbal statistics can be toggled separately using tweakables.

Product description

Meow! One of these engines gives more than enough thrust to jump as high as the sky, so we gave you two.

Jebediah Kerman's Junkyard and Spacecraft Parts Co


As of version 1.4.1 this engine has two models that can be switched in the editor.

TankButt variant
TrussMount variant
The different variants of the engine


Real-world comparison

The LV-TX87 was inspired by the American LR-87 engine, used for the first stage of Titan rockets.


  • Moved tech from Heavier Rocketry to Heavy Rocketry
  • Increased unlock cost from 6000 to 8000
  • Increased crash tolerance from 6 to 12
  • Increased EC generation from 3 to 8
  • Added ModuleTestSubject
  • Initial Release