Kerbal Attachment System (KAS)

 

Kerbal Attachment System (KAS)

This mod is another extension to the EVA duty of the kerbonauts. Now they can link different vessels together. Why linking? Well, how about transferring resources without docking? Or maybe two vessels need to stay together while not docked. Even more, this mod has active parts that can work as winches!

A great variety of links is supported:

- Rigid. It's basically a simple strut, but kerbals can set it up or remove being EVA. Bring some of these things on your Mun base and reinforce the structure!

- Rigid unlocked. It's still the same strut, but the joints are unlocked. It allows the vessels to move, while not getting too close or too far to/from each other.

- Active rigid. Do you need to tow a vessel? If yes, then you need a tow bar. Only in KAS you can find advanced models of tow bars that can assist steering. Greater towing speed means more fun!

- Flexible. It's an elastic cable that can stretch at some extent while still forcing the vessel to stay together.

- Active flexible. It's still a cable, but now its distance can be changed either via an EVA kerbal, or via a remote control GUI. Basically, it's an electric winch.

- Resource transfer. Zero structure force in exchange to an ability to have some free length. Link the vessels up to the maximum distance and move the resources via a convenient GUI (a way more convenient than the stock one!).

Almost any type allows remotely docking the vessels. Once docked, the vessels become a single base where the stock game functionality can work.

Demo media

- VIDEO: Active tow bar usage (TB-60 part).

- VIDEO: Winch demonstration (W-1 part).

- VIDEO: Refueling a vessel (RTS-1 part).

- VIDEO: Big movie of making Minmus station using the older version of KAS.

- IMAGES: KAS showroom.

* The videos above were created using the pre-release versions of KAS. Real appearance can differ.

Languages supported

 Русский

 Italiano

 Español

 简体中文

 Português

 Français

Support

You can support this and the other of my mods on Patreon. This is where I post my ideas, prototypes and the features development progress.

Other useful mods for EVA

If you want doing EVA comfortably, you really should consider adding these mods as well:

- Kerbal Inventory System (KIS). Now you can build and upgrade vessels in EVA!

- Easy Vessel Switch (EVS). No more guessing how to switch to "that vessel" - simply point and click!

- Surface Mounted Lights. Too dark for EVA on the other side of the moon? Problem solved with these ambient lights! 

How to install

- Recommended:

- Install and run CKAN.

- Search for "Kerbal Attachment System" or just "KAS", then install the mod.

- Occasionally run CKAN client to update KAS (and other mods) to the latest version.

- If you follow this path, then all the KAS dependencies will be updated automatically. It may save you a lot of time during the update.

- Manual:

- Download the ZIP archive:

- From CurseForge.

- From Spacedock.

- From GitHub.

- If you have an older version of the mod in your game, you must delete all the old files first! Do not just copy over, this will likely result in compatibility issues.

- Unzip the release archive into the game's GameData folder.

- Note, that names of the folders must be exactly like in the archive or the mod won't work.

- The release archive contains the minimum versions of the required dependencies: ModuleManager and CommunityCatgeoryKit. If your game has better versions, do not overwrite!

- Verify the installation: the mod's LICENSE.md file must be located at /GameData/KAS/LICENSE.md.

Forum

Ask questions and propose suggestions on the forum.

ABOUT THIS LISTING

This page describes Kerbal Attachment System (KAS) by ihsoft. The description and screenshots are the author's own, imported from their listing on CurseForge on 25 October 2026: https://www.curseforge.com/kerbal/ksp-mods/kerbal-attachment-system-kas

Mythiq.net hosts no files for it. The download button goes straight to the release file on edge.forgecdn.net, so you are downloading from the author's own host, not from a copy of ours.

The download count, rating and comments on this page start at zero and count Mythiq.net only. The source's own figures are not copied here — they measure a different site, and a number that cannot be checked against our own ledger is not worth printing.

GAME VERSION

Built against KSP 1.12.2, 1.12.1, 1.12.4, 1.12.5, 1.12.0, 1.12.3. Parts and plugins compiled for one major version routinely misbehave on another — a plugin for 1.8 can fail silently on 1.12.

DEPENDENCIES

Many part packs and plugins depend on ModuleManager, and some on each other. KSP's loading log (KSP.log in the game folder) names the missing dependency when a part does not appear; the author's page lists the usual set.

1. Download the archive with the button on this page and unzip it.

2. Move the mod's folder — the one containing the .version file or the part folders — into:

Kerbal Space Program\GameData

The path in game must read GameData\\…, not GameData\\\…

3. Start the game. Parts appear in their categories in the VAB; plugins show their own toolbars or settings screens.

4. If the mod ships a CraftNote or extras folder, leave it — some packs store example ships and textures there.

UPDATING

Delete the old folder in GameData first. Two versions of one plugin loaded together is the usual cause of duplicate parts and toolbar errors.