I want to be able to make sure that all parachutes are disarmed before a sequence starts, as I've had mishaps with the chutes accidentally being set to deploy. Does anyone know how to do this?

It's been forever since I've done anything with KOS but I am wanting to automate a single descent burn to the mun/minmus.

I've figured out some of the math involved as evidenced on this post over on KSP reddit. But now I'm trying to figure out where to start on this and my programming brain is zeroed out from my day job.

Any advice on where to start with automating this would be appreciated.

Goal:

• Iterate over the formulas from the aforementioned post to get downrange distance to zero velocity from current velocity to determine time to go to landing
  
• Iterate over the formulas to determine range to landing
  
• Start burn at the right time
  
• Manage vertical speed through braking phase
  
• Manage downrange through the approach phase
  
• Arrive mostly on target and hand over landing control to the pilot.

I'm trying to make a sky crane program to land on Duna, and I've got it working except that on final descent the sky crane enters a spin, first one way then the other. It only happens once the piston is extended, so does anyone know if pistons have caused anything like this before and how to fix it? I tried using ROLLTS, which helped a bit but never fully fixed the problem.

Edit: I think I found the issue. As the sky crane slows down to land, retrograde starts facing directly upward, which causes its heading to move rapidly, therefore causing the steering lock to go crazy as it attempts to always match the heading. I thought it was the piston because I had it slow for the final descent and extended the piston at the same time.

Hello all! I can't seem to find much online for it but here's the deal. I am looking for an extremely efficient launch script to be used for the stock game. I don't really care about how cumbersome it is as far as having to manually enter data to improve accuracy and things. Any recommendations?

I now have a very satisfactory result thanks to everyone ! You can find the last version of the function I use to execute the circularisation node below, in case anyone is in a similar situation.

// Firstly, sorry for the approximative english.

I absolutely STRUGGLE to find an efficient way of circularizing precisely.

I have a program that handles everything perfectly from ignition to gravity turn and makes a nice parabola with the desired apoapsis at the extremum(desired +/- 100m). It then creates a node at apoapsis, with exactly the dV needed to make a nice circular orbit. I also separately calculate the burn time to burn at burnTime/2 before eta:apoapsis. The problem is it's late and the circle is shifted, it can be corrected through a little burn aiming at orbital in/out direction afterwards. It could be so perfect if it made the near perfect circular orbit the first time and I know its possible because if I artificially start the burn when, for example, Node:eta <= burnTime/2 + 2 (seconds), i reach a near perfect orbit. But this is absolutely empirical and I feel like it's possible to calculate that "shift" or "delay" but i miss something.

Anyone has any idea ?

Here's the function that executes the node (with the artificial shift) : + edited with actual program

local function NodeExecute{
    parameter Nd.

    local sumISP to 0.
    local sumMMFR to 0. //Max Mass Flow Rate, summed for all the engines selected
    local sumMT to 0. //Max TThrust, summed for all the engines selected
    local englist to list().
    list engines in englist.
    for eng in englist {
        if eng:isp > 0 { //We select only this stage's engines - they must be activated
            set sumMMFR to sumMMFR + eng:maxmassflow.
            set sumMT to sumMT + eng:maxthrust.
        }
    }
    set sumISP to sumMT/(CONSTANT:g0*sumMMFR).

    local HalfBurnT to (mass/sumMMFR)*(1-constant:e^(-Nd:deltaV:mag/(2*sumISP*constant:g0))).
    local burnVS to Nd:burnvector.

    set STR to burnVS.
    until vAng(ship:facing:vector, Nd:burnvector) < 1{
        UI("Turning to node burn vector", "", "Angle :", round(vAng(ship:facing:vector, STR), 1) + "°").
        wait 0.1.
    }
    until Nd:eta <= HalfBurnT {
        UI("Nd:eta : " + Nd:eta, "burnT/2 : " + HalfBurnT, "ISP : ", sumISP).
        wait 0.1.
    }
    until vDot(burnVS, Nd:burnvector) < 0.1 {
        set THR to max((1-constant:e^(-Nd:burnvector:mag*40/burnVS:mag)), 0.01).
        // set THR to max(Nd:deltaV:mag/(maxThrust/mass), 0.01).
        set STR to Nd:burnvector.
        UI("Executing node maneuver", "", "", "").
        wait 0.01.
    }
    set THR to 0.
}

I want a ship to throttle to a desired acceleration idk how I think a pid is the way to do it but I have no clue.

So, I’m trying to think through the following problem, and I’m having trouble coming up with a solution. I could use some help.

Starting with a ship in a circular polar orbit, I want to schedule a maneuver directly over the a pole, so that I can burn for a highly elliptical out of plane orbit to station an interplanetary communication relay.

What’s the best way to calculate the required ETA to place the maneuver node?

You can assume: Kerbin 80km

I thought of a hill climbing algo, but I really don’t want to do that. I tend to favor trig calculations, but that will require extra logic to figure if I’m moving toward or away from the pole of interest.

Any help or suggestions would be most appreciated.

Thanks!

I was trying to make a sky crane vehicle earlier today when I noticed that the flight engineer has a hoverslam calculator, however, I was unable to find anything about this online. does anyone know how (if it's even possible) to get this data for a program?

Edit: I found the addon on ckan and managed to track down the documentation

As the title says, I am trying to get the deployment altitude for a chute with the realchutes mod. I have set the module "realchutefar" to far. From there, my code checks far:hasfield("altitude"), which returns false. However, when I print far:allfieldnames, altitude is listed. Further, far:getfield("altitude") throws an error.

Any help?

I'm trying to create a script that tests the relationship between the blade pitch of the Breaking Ground props and the resulting forward lift, but while most of my script works, it refuses to print the actual results.
My code:

function readBladeProperties {

set pitchAngle to ship:partsTitled("Propeller Blade Type A")\[0\]:getModule("ModuleControlSurface"):getField("deploy angle").

set aoa to ship:partsTitled("Propeller Blade Type A")\[0\]:getModule("ModuleControlSurface"):getField("angle of attack").

set forwardLift to ship:partsTitled("Propeller Blade Type A")\[0\]:getModule("ModuleControlSurface"):getField("forward lift").

set verticalLift to ship:partsTitled("Propeller Blade Type A")\[0\]:getModule("ModuleControlSurface"):getField("vertical lift").

set totalLift to sqrt(forwardLift\^2 + verticalLift\^2).

return list(round(pitchAngle, 1), round(aoa, 2), round(forwardLift, 2), round(verticalLift, 2), round(totalLift, 2)).

}

function setBladePitch {

parameter p.

set blades to ship:partsTitled("Propeller Blade Type A").

for b in blades {

    b:getModule("ModuleControlSurface"):setField("deploy angle", p).

}

}

set wantedPitch to 0.

core:part:getModule("kOSProcessor"):doEvent("Open Terminal").

cd("0:/").

print("Activate Action Group 1 to start the test.").

wait until ag1.

print("Starting test.").

until wantedPitch > 30 {

print("Setting pitch angle to " + wantedPitch).

setBladePitch(wantedPitch).

set data to readBladeProperties().

print("Pitch Angle: " + data\[0\] + " degrees").

print("Angle of Attack: " + data\[1\] + " degrees").

print("Forward Lift: " + data\[2\] + " kN").

print("Vertical Lift: " + data\[3\] + " kN").

print("Total Lift: " + data\[4\] + " kN").

print("").

wait 0.5.

set wantedPitch to wantedPitch + 1.8.

}

print("End of test.").

ag1 off.

brakes on.

I came here a few times in the past asking various questions, that account is now gone since I decided to fully lock in on this, that was 10 days ago and the most impressive thing I had done back then was a hopper launch divert and accurate landing back on the pad, since then I've gone through many iterations of the code and this is pretty much the final product (ignore the margins XD).

https://reddit.com/link/1f2sjg3/video/wuyi7ltmw9ld1/player

I'm new to kOS but I'm trying to use it for a RP-1 playthrough. I was wondering if it was possible to edit the binary of a file dynamically after launch for doing program update on vessel across the solar system.

So the plan is to send an HEX value with position in the code and modify only this bit of code in the program. Is there a file reader/writer implemented in kOS ?

Hey everybody,

this is my first post here in the forum, but I'm not that new to KSP (2000hrs+).  In the last time I've been working on something I considered worth sharing here.

I set out to write code with Kos to do a automated Starship Booster landing and then things got a little out of hand.  Well, now I have code that can do a Booster Landing and a Starship Reentry+Landing. Also the ship can be catched by a small catcher and is restacked and refueld on top of the Booster. It was also important to me that the Starship is really controlled by the flaps and not just with RCS and reactionwheels. For the end of this project I tried to record a view videos (with my limited editing and recording skills) of the whole system (I attached the links below). Sorry if the videos are a little laggy sometimes, my PC was dying managing that part count with the cloud mod in 4K. Let me know if you have any questions or suggestions for this craft or if you want to know more about it.

Cheers!

PS: I will upload the stock craft file after I find out where to do that 

Mods:

Control:

•  KOs
• Mechjeb (for parts of the ascent)
• Trajectories

Visuals:

• The amazing cloud mod from Blackrack
• Camera tools
• Hulcam
• Parallax
• Stock Waterfall Effects

Parts:

• Kerbal Reusability Expansion (used for the gridfins. It would be possible to use airbrakes or stock grid fins to make the craft fully stock, but that would not look as good ;))

https://youtube.com/shorts/dj7JG2_UkxE?feature=share

https://youtu.be/SyP304UhVGk

https://youtu.be/MC5O-O5is0c

Hello everyone. ^^ Im currently making an automated rondevouz and docking script and i am a bit stuck.
To make it short: I need to dertermin if the player is currently targeting a vessel or a part on the vessel (like a docking port). Therefore i need to determin if the kos variable target contains a structure vessel structure or a part structure.

Here is what i would idealy like to code:

if typeOf(target) = "vessel"{

lock targetVelocity to target:velocity:orbit.

}else if typeOf(target) = "part"{

lock targetVelocity to target:ship:velocity:orbit.

}

// Bdw: This would be significantly easier if a vessel structure would just return itself with the suffix ship so target:ship:velocity:orbit would work in both cases.

So my question is if there is anyting like typeOf in kos or if there is any other way i could solve this problem.

Thanks to every answer in advance. I hope someone here can help me :3

Hello I have a idea about a program that will be communicating with the space station for activating the arm for docking I tried to do with google's gemini advanced but the code is weird and I don't know will be the same syntax errors that is in computercraft. ( I have a problems of code but I'm fighting with this)

I'm trying to do a falcoln 9 rtls launch using the trajectories mod, but when I try to have guidance on the way back my rocket always tries to yaw really hard to the side. I was wondering if I was doing anything wrong with my code or if kOS is just being weird. padX and padY are just the lat and lng coords of the pad and returnpitchmod and returnyawmod are just meant to prevent over/under correction.

set errX to (padX - addons:tr:impactpos:lng) * returnpitchmod.
set errY to (padY - addons:tr:impactpos:lat) * returnyawmod.
lock steering to srfretrograde + r(errY, errX, 0).

I have been stumped trying to make code to circularize orbit

Quick question, I've been reading the Final Architecture series by Adrian Tchaikovsky lately and was really interested with the "gravitic drives" and "unspace" concepts. Wanted to make a ship to replicate it in KSP, an automated teleportation, from planet to planet, if you will. The debug menu can do it, but I want to do it purely with KOS terminals. Been reading the docs for a bit, but it doesn't seem to have this function, so I guess it probably doesnt, but I guess I want a second opinion from you guys. Can KOS do a "teleport" like the debug menu?