SSTO Project

SSTO project add wide range of high-performance spacecraft parts

License: MIT

Game Version: 1.12.5

Source code: Monniasza/SSTO-Project

Downloads: 23,745

Author: Monniasza

Mod Website: Forum Thread

Followers: 10

Report bugs here

Check out the add-on, Ultimate Part Converter and my new game, MultiMachineBuilder

Supported mods:

  • SpaceY (both mods) - for large nuclear engines
  • Making History - Size 1.5 nuclear engine
  • HGR - high performance chemical engines
  • Procedural Parts - when installed, it alsoo adds LPG versions of procedural tanks.
  • Procedural Start - when installed, the LPG procedural tanks unlock immediately.

Recommended mods:

Kerbal Engineer Redux - to correctly display performance of nuclear jets


SSTO Project now includes LPG. To get converted engines, get Ultimate Part Converter here


  • Toroidal Aerospike Nuke - a high-performance nuclear engine intended for use in SSTOs with Real Solar System
  • Advanced Aerospike Jet Engine - a high-performance aerospike hypersonic turboscramjet and cooled rocket for use with oxygenated atmospheres
  • NSABRE - a high-performance nuclear aerospike hypersonic turboscramjet and NTR hybrid for use with all atmospheres
  • SuperJet - hybrid IGRAF/ABGRAF (internal gas recirculation aerial fusion/air breathing gas recirculation aerial fusion) air-augmented jet and rocket engine
  • High performance nuclear engines:
  • 250% times the thrust, 40% the mass and 180% the efficienncy of the stock nuke
  • 100% times the thrust, ~10% the mass and ~106% the efficiency of the stock nuke
  • MR13 "Soyuz Launcher", MR12 "Doubly Intermediate", MR11 "Medium Interplanetar" - high performance chemical 1.875m rockets


  • Cyclotron - aerial fusion reactor for creating large amounts of electricity from liquid fuel. Each unit of fuel provides 52.800 gigajoules of energy.
  • Nuclear Battery - battery which stores large amounts of electricity


  • Wings and Elevons ending with "+" in name - aerodynamic surfaces with 10 times more aerodynamic strength


  • Science Room, Science Package, Advanced Science Package and Ultimate Science Package - next tiers of science labs, each weighs 10 tons and has 6 seats, last one is experiment too.


  • Air Liquefiers - convert different planetary atmospheres into MonoPropellant (for 100% MP, use KSPIE with any atmosphere), Oxidizer (oxygenated atmospheres only) and LiquidFuel (optionally requires Explodium Breathing Engines)
  • Fuel Scoop - slowly generate small amounts of fuel
  • Change tech of external seat to "Start"
  • Change tech of Size 1 pod to Engineering 101 Science:
  • Ultimate Science Package is now its own experiment - see science parts
Loading changelog...

Stats for SSTO Project

Downloads over time

Downloads per version

New followers per day

Top Referrers


Export Raw Stats

Export Downloads

Export Followers

Export Referrals

Raw stats are from the beginning of time until now. Each follower and download entry represents one hour of data. Uneventful hours are omitted.