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  • Kerbal Space Program
  • 43,608 Monthly Downloads
  • Supports: 0.90
  • 666,152 Total Downloads
  • Updated 12/21/2014
  • Created 05/06/2014
  • 1,423 Favorites
  • Project Site
  • Comments
  • Release Type: Release
  • License: GNU Lesser General Public License version 3 (LGPLv3)
  • Newest File:
Support development! **

About MechJeb

Usage instructions:

Add either the AR202 surface-attached case from the Control tab or the MechJeb pod from the Pods tab to one of your vessels.Then use the button on the right side of the screen to access MechJeb window selection interface, and click on the buttons to activate the windows. The windows can be dragged anywhere on screen, and their position is saved and reused among all rockets.



KSP Forum thread

Online Manual

Support Requests

Bug fix related to the Tracking Station upgrade. Some function will not be disabled until the station is upgraded.


First Previous Page 1 of 11 Next Last
  • #165
    Space core?

    Appears the image used for it looks like space core. It being this mod.

  • #164

    Has a few issues, but is by far the most useful mod out there (in my opinion). Really helps when you just don't want to go through the process of getting into a simple orbit or when you want to land. Also really useful to perform manuevers and basically do anything in space.

  • #163

    Any plans to update this to account for terminal velocity with FAR or NEAR installed? Would prefer to be able to use that mod but ascent guidance thinks there is no terminal velocity and I end up getting destabilized and doing about 13 back flips as soon as my rocket starts gravity turn. Right now my priority between the two mods is this so I had to just uninstall FAR.

  • #162
    Re: MechJeb Problems

    I have found two issues.

    1. When trying to decend from orbit, MechJeb times out and stops working. If I keep trying over and over, it sometimes will work, but not always.

    2. Rockets are landing way too hard and blowing up. The engines do fire, but too late and too little to stop decending.

  • #168

    I too have experienced it from time to time, mostly trying to land something big&heavy. I mostly use it to help finish the landing (i.e. keeping the rocket straight), and it works like a dream. I find that leaving everything to it is...not the best idea.

  • #161

    Hey there. I use play KSp on steam version. I have ckan installed to install my mods. I already tried MechJeb Mod once but i had to make a reinstall and after my KSp reinstallation and MechJeb Mod installed, i dont see any mechjeb window when im in game (Sandbox).  I know that i carrer mode i need to unlock it in the tech tree but in Sandbox, im am supposed to be able to use it but i just dont see it In sandbox. So i tried manual install and still same thing.

    Anybody have an idea of what i have done wrong ???

    Tks for any help

  • #170

    I was having a similar problem for a long time. In my case, there were older versions in other folders that were conflicting.

    MechJeb (and all its files) should be only in your GameData folder. Check your Plugins folder (and any others, just to be sure) and subfolders to make sure there aren't any MechJeb DLL files lurking around (I had two in different spots). Once I got rid of all of them, MechJeb started working just fine. 

  • #160

    I have coppied the extracted files to the game date. now how do i use this mod in game?? how do i get those windows?

  • #167

    If I remember correctly yuou have to first go back to research tree and unlock the added MechJeb modules

    Then attach them to your ship. 

  • #158

    Nice mod! I use it mainly for docking and is working fine. But landings are not working... no problem, I'll do those myself :)

    Last edited by musdancat on 1/28/2015 5:46:19 AM
  • #155

    So been using this mod for quite a while, mainly just to help with creating maneuver nodes etc. but the last few days i've been lazy and actually attempting to use the MJ autopilot features only to find my rockets spinning wildly and mechjeb seeming to have downs syndrome on finding nodes ( i have to manually set SAS to the maneuver node until it gets close then switch it back to just stabilization. Lord forbid you try and use auto dock.... any fixes planned for these, it's not the rockets as they fly fine under manual control and this is across all modes sandbox career w/e

  • #157

    I'm having exactly the same issue. I've taken it all the way back to a stock install with just mechjeb and I'm still getting the same issue.

  • #156

    Do you have FAR installed?

  • #154

    does this works on game version 0.25?

  • #159

    This suggests you're using a torrented version (since it's now up to version 0.90.705).

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