SpaceY Heavy Lifters (SYL) by NecroBones

Adds 5m rocket parts, plus a variety of related parts and 3.75m items to fill in gaps.

License: CC-BY-NC-SA 4.0+ARR

Game Version: 1.12.5

Downloads: 397,520

Support this mod: Donate

Followers: 525

SpaceY Lifters (SYL)

SpaceY Lifters (SYL)
KSP version License
Curseforge GitHub Pages

Code SpaceY.Lifters.dll

78 parts for large lifting rockets, 5m rocket parts, large SRBs, and matching decouplers for Kerbal Space Program.

By zer0Kerbal, originally by NecroBones

adopted with express permission and brought to you by KerbSimpleCo

SpaceYLifters (SYL)

Forward by NecroBones

SpaceY Lifters is a parts pack that is intended to extend the stock line-up of parts for lifting heavy payloads to orbit, by providing a similar update to the NASA/ARM pack from 0.23.5, in the next size up.

It provides a range of 5m fuel tanks and engines, a fueled 3.75m nose-cone, both "stack" and "radial" decouplers, a fueled size adapter, and a range of powerful SRBs.

The name is a play on "SpaceX" in the real world, but also has the amusing double connotations of being "spacey", and also "Space, why?" -- Because it's there!

All of the models and textures were made 100% from scratch, using Blender, Photoshop, and Unity.

Part of the NecroBones suite of mods, that work nicely together!

Design Goals

  • Maintain a "pretty", but still mostly stock-alike appearance. While KW goes a long way toward realism, we want to have a smaller pack that blends nicely with stock, and other stock-alike packs.
  • While extending the stock game, try to maintain a gameplay balance with stock.
  • And do so while adding:
  • Another layer of large rocketry, beyond the 3.75m ARM/NASA update that was added in KSP 0.23.5. Specifically, 5m parts.
  • Large SRB options with high thrust and shorter burn times than the NASA/ARM SRB.
  • Large rocketry utilities-- Big radial decouplers with thrusters built in, larger sepratron, etc.

  • Contains several unusual or unique features, including some "firsts":

  • Engines with multiple sized fairings, or with conical fairings.
  • Engine clusters with mode-switching for activating/deactivating nozzle groups.
  • Rocket-assisted radial decouplers.
  • Stack size adapters with multiple target diameters (adaptive shrouds).
  • Docking ports with guide-lights.
  • Fuel tanks with automatic shrouds.
  • Thrust plates and adapters with fairings.
  • "Petal" cargo bay.

See more

<details> <summary>Youtube logo</summary> Review by [`Kottabos Gaming`](*/) [![KSP Mods - SpaceY Heavy Lifter](]( </details> <details> <summary>Imgur logo</summary> ![Sample images]( </details>


  • English English
  • Russian (Русский) Russian (Русский) - спасибо evanisrael
  • your translation here

Help Wanted

  • Logo(s) for SpaceY Lifters (SYL)
  • Compatibility patches
  • Contracts for these glorious parts
  • Sample crafts/subassemblies
  • Variant textures and model updates (add/improve: lights, iva, hatches et al)
  • Variants: Converting from InterstellarFuelSwitch|Firespitter to stock
  • Marketing Images and Videos such as hero shots, animated gifs, short highlights
  • Translations: See the README's in the Localization folder for instructions for adding or improving translations. There is also the quick start guide(s). GitHub push is the best way to contribute. Additions and corrections welcome!
  • Have a request? Glad to have them, kindly submit through GitHub.

Installation Directions

Most recent releases only available via CurseForge/OverWolf Website/App

CurseForge/OverWolf App






parts, config

red box below is a link to forum post on how to get support

How to get support

Be Kind: Lithobrake, not jakebrake! Keep your Module Manager up to date

Credits and Special Thanks

Legal Mumbo Jumbo (License provenance)

Author (1) - zer0Kerbal

Forum: Thread - Source: GitHub - Download CurseForge
License: License License

see Notices for more legal Mumbo Jumbo

Original Author (ROOT) (0): NecroBones

Forum: Thread - Download: CurseForge - Source: SpaceDock
License: License License


  • All bundled mods are distributed under their own licenses
  • All assets, including but not limited to: animations, models, sounds and textures are distributed under their own licenses. License

  • see Notices for more legal Mumbo Jumbo

How to support this and other great mods by zer0Kerbal

Comment, click, like, share, up-vote, subscribe

Completely voluntary, absolutely amazing, and really does help out a lot!
and it is true.

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Track progress: issues here and projects here along with The Short List

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