Kerbal Space Program (KSP) is a spacecraft simulation game for Mac, Linux or Windows. Players build, launch, and pilot spacecraft and airplanes through a fictional 8 planet star system.

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Any way to edit game files to revert a flight in KSP?

I was showing my friend what Kerbal Space Program was all about, and I wanted to launch a quick mission to the Mun and land so I could EVA just to show him the massive scale of the game. When I got to ...
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37 views

Half of my training missions are missing

After not playing for a while I re-launched KSP and went back to refresh my skills with the training missions - however I only have the more advanced missions available - how do I reset or re-acquire ...
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103 views

In this Kerbal Space Program tutorial, why does the commentator put the Stayputnik module on top of the crew capsule?

I have been watching Scott Manley's KSP tutorials, specifically this one here. He intentionally strands a Kerbal in orbit, then shows how to build a "rescue rocket", but doesn't go very in depth on ...
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1k views

My Mun encounter trajectory intersects the Mun. Is this optimal?

My encounter trajectory is pictured below. From a fuel-efficiency standpoint, is it optimal for my encounter burn to intersect the Mun, then perform another burn to curve my periapsis out to a ...
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1answer
100 views

Kerbal Space Program Unmanned modules

How can I fly an unmanned module? It shows SPU:no connection when I right click on it. I have tried adding batteries, comms dts m1 on it but no luck.
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2answers
89 views

Parachute activates on launch problem

So in Kerbal Space Program Im using the MK2 Radial Mounted Parachute, attached to the side of a Science Jr. Module. The issue im facing is that at launch the parachute automatically activates causing ...
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1answer
160 views

Is there any way to reduce repeated science experiments?

There are many science experiments in the game that only give you part of the (remaining) value whenever you carry them out and retrieve the data. So, even if you rerun the experiment, you only get ...
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1answer
163 views

Can one replace/add a ship part in orbit? [duplicate]

I have a reusable ship in orbit and wish to add some parts to it (e.g. parachutes, heat shield, Mono-Fuel ...). Is it possible? Is there a mod that lets an engineer to do it?
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2answers
371 views

How can I cheat docking in Kerbal Space Program

To make things clear, I know how to and can dock, CoM thruster placing, translation, RCS build aid, 'cotrol from here' etc inclusive. I've built a multi-piece orbital station that was assembled in ...
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1answer
250 views

Are Fuel Cell Arrays efficient enough for mining ships?

In Kerbal Space Program I'm developing a refueling/mining network. I've got miners scattered across the stellar system, but now that I'm out on Jool's moons, I've found that solar panels aren't as ...
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1answer
108 views

Does an RTGs efficiency decrease?

I've got a ship with Radioisotope Thermal-electric Generators (RTG), they're the stock PB-NUK variety. When I right click on them they say "Efficiency 1.0". In reality RTGs wear out over the ...
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3answers
68 views

Does items/modules breaks or malfunction in KSP?

I've played for more than 100 hours, nothing stop working so far, but does it happen?
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112 views

Mounting a time-limited rescue mission for kerbal inbound to Kerbin

I have a poor kerbal who, due to poor planning by mission control (erm, me), is returning to Kerbin, but does not have sufficient fuel to enter orbit. The situation: She has 84 days of supplies ...
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2answers
117 views

Kerbal - Is it possible to transfer fuel with a probodobodyne OKTO in the middle?

I want to transfer fuel between two tanks while they are docked in orbit. The thing is, one of the tanks has a Probodobodyne OKTO between the docking port and the tank. I don't want to use any ...
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2answers
327 views

How to achieve Kerbin orbit without using maneuver nodes?

I'm having a very hard time to fulfill the Orbit Kerbin contract. I already saw a dozen videos of people explaining how to orbit and saw another billion texts. The problem is, when I'm in orbit, ...
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2answers
981 views

Why won't my MK16 parachute deploy?

I just started a career mode in KSP and the simplest setup fails to work. I have a RT-10 Solid Fuel booster with an Mk1 command pod on top and an Mk16 parachute at the tip. Whenever I deploy the ...
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1answer
346 views

Can't save subassembly “THE SELECTED PART IS NOT ATTACHABLE!”

When trying to save a 'science prob' (see below image), I keep getting the above message and can't save it. Action taken to produce result: Build the module (see image), drag and drop the OKTO pod to ...
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3answers
302 views

Do I need more than 1 Antenna / Comms / Communotron?

What might the reason for taking more than 1 Antenna into orbit / space?
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1answer
119 views

Maintaining control during probe atmospheric landing with RemoteTech

I've dived into unmanned exploration with RemoteTech mod for added challenge. I am at an early stage in the Career mode and my core communications constellation is 3 satellites at 700km orbit with a ...
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1answer
553 views

How to 'Test BACC “Thumper” Solid Fuel Booster in flight over Kerbin'?

After endless tries, how can it be achieved? Req: 5Km~14Km, 100~800 m/sec I created a craft with the device, achieved all test conditions (all is green), still I don't get the achievement. What did ...
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1answer
480 views

In To the Mun, Part 1, is there actually enough fuel to get to the Mun?

I'm trying to land on the Mun in the first Mun tutorial. What I find is that I can escape Kerbal orbit and intercept the Mun, then set an orbit basically going straight down into the Mun. But when I ...
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1answer
395 views

Can't make sense of launch window planner results

I've been using alexmoon's KSP Launch Window Planner to plot transfers from the Mun to Minmus, but the trajectories that I get are quite far off, and I feel like I must be doing something wrong. What ...
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123 views

Spaceplane speeds on Kerbin- beating 1400m/s

I'm doing my best to launch an SSTO into orbit. Currently, my primary objective is to replace my LVT-30 with an LV-909 so that I can reap the d/v rewards. Unfortunately that means pushing as high and ...
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111 views

How does KSP simulate objects out of focus?

I've attempted to perform a controlled aerobraking maneuver against Kerbin upper atmosphere (>55km) when returning from a moon and decided to speed things up with fast-forwarding from the Tracking ...
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74 views

Can a contract be written that unlocks parts?

Is it possible to write a contract that unlocks parts rather than, or in addition to, money or science? I want to make it so that, for example, to unlock a better engine you would have to prove that ...
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3answers
300 views

Usefulness of SSTOs and spaceplanes

There's a lot of chat about SSTOs for KSP. I recently managed to design, launch into orbit, and recover an SSTO. However I have to say that having achieved this, I don't really see what the appeal ...
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1answer
332 views

Is it a long term lose to transmit experiment data in KSP .23+?

We have a question that is almost the same as this one...but the question and answer both pertain to an earlier version (< .23), and note that the specific answer was to change with the newer ...
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2answers
176 views

How can I calculate if something can land on an atmosphere-less body?

As a part of a contract I'm bringing a surface outpost of ~10t to the surface of Minmus. I want to land that thing intact and for that I need to calculate how much engines/thrust/fuel I need on the ...
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2answers
339 views

Efficient solar panel placing strategy

I've built a Mun-orbiting science station to process all the experiments that I've gathered from surface and space around. Basically this is simple final-stage rocket with four 3x2 solar panels ...
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1answer
167 views

Cause of broken lander legs on my rover? Kerbal Space Program

I made a rover for drilling, containing both wheels and landing struts (for support while drilling.) At first it worked fine, but as I was playing around with various wheels and configurations, I ...
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1answer
199 views

Is Terminal Velocity important in KSP 1.0+?

Related: Terminal velocity table for KSP v1.0 and later? I like to build big fast rockets. I always get wind and heating effects on my way up. Prior to version 1, that was incredibly inefficient ...
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1answer
1k views

Terminal velocity table for KSP v1.0 and later?

The KSP wiki presents an interesting table of terminal velocity in Kerbin's atmosphere preceded by an useful advice: Note: this table is useless with KSP version 1.0 and later, see the explanation in ...
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2answers
106 views

Solar intercept from collision course

I've got a craft that was stranded in solar orbit. Unfortunately, this orbit also came close to Kerbin's orbit. After a few cycles whilst I was trying to intercept it, it is now on a collision course ...
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5k views

Is there a way to play KSP without having studied rocket science?

A couple of years ago I bought KSP and struggled to even get through the tutorial getting the "basics". I didn't get anywhere, got frustrated and just stopped playing the game. However this morning I ...
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3answers
256 views

Landing at Kerbin without a chute

I've got a Duna lander. I used my chutes to land on Duna with basically no cost, which was nice. Unfortunately, I did not bring an engineer with me, as I did not know you needed one to repack chutes ...
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1answer
148 views

KSP: why does TrackIR crash the first time, run the second time?

I start TrackIR 4.0 software, to control a TrackIR 5 camera (KSP doesn't support TrackIR 5 software yet). Then I start KSP and load a game. When the spaceport appears, headtracking is inoperative ...
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1answer
125 views

Satellite exploding while in transfer orbit

I've accepted a contract to launch a satellite into polar orbit. I've done this before and things went totally smoothly, whereas now when I'm doing another contract like this I've stumbled upon a ...
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2answers
296 views

Why is this decoupler attached wrong?

Why is this decoupler attached wrong? When I launch my ship, it's fine, but why does the engineering report say this: Any ideas?
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92 views

What is the list of career mode general achievement contracts?

As @Philipp points out in a comment to this question: The general achievement contracts only appear when it's something you haven't already done yet. To maximize my career performance I'd like ...
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2answers
329 views

New Surface Outpost Contract - add on to an existing base?

So I currently have a surface outpost on both Mun and Minmus, but I've now received two more contracts to do the same thing -- one outpost on each moon. Instead of creating a whole new outpost, is it ...
3
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1answer
192 views

When should I perform the inclination matching maneuver?

I'm sending a manned mission to Minmus and, as Minmus' orbit is inclined to Kerbal I need to perform a maneuver to align inclination. From one of Scott Manley's newbie career guide videos I hear that ...
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3answers
518 views

How do multiple Mobile Processing Labs work?

Related: How does the Laboratory work? I had a orbital station with 1x Mobile Processing Lab (MPL-LG-2) in LKO. With another small vessel I did a tour of Mun and Minmus, collecting science as I ...
3
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1answer
339 views

How to bring back mysteriously missing contract in Kerbal?

For reasons unknown contract "Explore Mun" disappeared for me. I can't see it in accepted, can't see it in finished, nowhere. Not even in Alt+F12 debug console. I got the contract to explore Minmus ...
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4answers
542 views

Rover power in KSP

I've built a small rover in KSP. I launched it, landed on the Mun and literally pushed it off the top of my lander. However, the outcome is seriously disappointing. Even at the maximum rated speed of ...
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2answers
299 views

Kerbal Space Program: Gigantor XL solar arrays wobbling heavily on Space Station (no mods)

Background info: I was building a station similar to how the iss was built. So I added module by module. I placed a control module, with a drone core, lots of RCS fuel and SAS modules. After that I ...
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2answers
462 views

I can't perform science experiments but retrieving space crafts

I have gone into space and went EVA and right clicked on my kerbal, nothing appeared. (I am in science mode) I can't use the mystery goo container or science jr. I am on a mac and using 1.0.4.
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KSP Flight Menu won't appear(64X windows 8)

Yeah, it was working a while ago, but ever since my dad decided to install 7 DIFFERENT anti viruses. Normally, pressing esc while in flight or doing a science report replies with a menu appearing. ...
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218 views

Can't control small probe launch

I've got a very small probe rocket that I'm looking to launch to harvest a bunch of "Return science from X location" contracts- in this case, Kerbin orbit. However, when I try to launch the probe, ...
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340 views

What role does terminal velocity play in a rocket launch?

The section about terminal velocity on the KSP wiki says that terminal velocity "represents the speed at which a ship should be traveling upward during a fuel-optimal ascent." It also has a table of ...
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514 views

Kerbal Space Program: Getting the SRB-KD25k “Kickback” to orbit?

In KSP, I have a contract to test the Kickback SRB in orbit. That seems impossible to me, how do I get a huge SRB like that into orbit? Remember, I can't light it up until it's in orbit or the ...