[1.3.0] Kerbal Engineer Redux 1.1.3.0 (2017-05-28)

[Red Iron Crown]

Is it somehow possible to have at least somewhat accurate calculations with the air breathing jet engines?

I heard it is hard because of the thrust curves?

Use the atmosphere sliders to set the conditions for which you wish to calculate and it gives very accurate numbers.

[Oinker]

i'm a dumb-ass. i couldn't find a current answer on whether i can turn off the stock toolbar and turn on blizzy's in 1.0.16.6.

Edited June 11, 2015 by Oinker

[smjjames]

Theres a functionality problem with tweakable everything in that it (MJ and KER actually) doesn't recognize that the docking port has been toggled to not have crossfeed.

I know it works fine with the procedural fairing crossfeed toggle, but with the Tweakable Everything toggle, it doesn't work.

Steps:

1. Have tweakable everything and make a basic lander with radial engines, stick a docking port under that.

2. Stick another docking port to that docking port and a tank (engine is probably optional)

3. Toggle crossfeed in the docking ports, I've tried one and both ports.

Example:

I also checked with stock ports:

[Nori]

And here i thought the KerbalEngineer.Extensions.PartExtensions.GetModuleMultiModeEngine error was the fault of some unholy mod combination. Glad I did a google search or I would probably be pulling my hair out testing each mod one by one.

[*Aqua*]

Unfortunately KER doesn't seem to know about Karbonite and therefore doesn't calculate dV and thrust when using Karbonite engines.

Do you plan to add support for it?

[Aherys]

Errr... i've got bad value with KER :

http://nsa38.casimages.com/img/2015/06/14/150614090021192352.jpg

Why KER calcule the Delta-V only for the first stage w/o decoupler ?

It's a mod conflict ?

(Sry for my bad english, isn't my first language... :s=

[Red Iron Crown]

Aherys, did you perhaps build that rocket from the bottom up? KER gets confused by stages above the root part, it looks like it is considering everything above the first decoupler to be useless mass to be discarded before burning the SRBs.

Try using the reroot tool to make the pod at the top the root part, it should calculate properly then.

[Aherys]

Ohw.... thanks, will try this !

EDIT : Wow ! That was this, so thanks ! Was searching all the evening to solve this prob ^^' +givethatmanacookie.

Edited June 14, 2015 by Aherys

[Drew Kerman]

Ohw.... thanks, will try this !

EDIT : Wow ! That was this, so thanks ! Was searching all the evening to solve this prob ^^' +givethatmanacookie.

See my sig for a guide on how to build top-to-bottom and in a way that will never confuse KER and still give you all the data you need to make sure your spacecraft will complete the mission

[selfish_meme]

I have a couple of questions if someone has a moment.

1. A Rhino powered craft will show a TWR of up to 1.98 in the VAB for Kerbin but be unable to takeoff the pad? I'm not sure whats going on with this one.

2. All craft require an initial TWR of 2.1+ to take off on Eve when the body is set to Eve in KER. I would have thought it would be 1+ when the body is set correctly.

I don't necessarily think these are errors just gaps in my understanding.

[BudgetHedgehog]

Be sure to select 'Atmospheric' option in the VAB instead of the default 'Vacuum'. The Rhino, being a vacuum-optimised engine, has incredibly poor performance in atmosphere.

[selfish_meme]

Be sure to select 'Atmospheric' option in the VAB instead of the default 'Vacuum'. The Rhino, being a vacuum-optimised engine, has incredibly poor performance in atmosphere.

Thanks, I was not doing that.

[KerbMav]

I think I already asked this once, but does KER have trouble with resources put into the engines itself?

@PART[nuclearEngine]:FINAL

{

@mass = 2.80

@MODULE[ModuleEngines*]

{

PROPELLANT

{

name = Nukleum

ratio = 0.0001

DrawGauge = True

}

PROPELLANT

{

name = Raddish

ratio = -0.0001

DrawGauge = True

}

@PROPELLANT[LiquidFuel]

{

@ratio = 0.9

}

}

RESOURCE

{

name = Nukleum

amount = 20

maxAmount = 20

}

RESOURCE

{

name = Raddish

amount = 0

maxAmount = 20

}

}

RESOURCE_DEFINITION

{

name = Nukleum

density = 0.01

unitCost = 1

flowMode = ALL_VESSEL

transfer = PUMP

isTweakable = true

}

RESOURCE_DEFINITION

{

name = Raddish

density = 0.01

unitCost = 0.01

flowMode = ALL_VESSEL

transfer = PUMP

isTweakable = false

}

[Padishar]

It is probably the negative ratio for Raddish that is confusing things, I wasn't aware that ModuleEngines supported that. What happens when you try it?

[hypersonic]

Hello Kerbal-nauts, I posted this on GamePlay section and someone suggests me to post it here:

The problem arise when I fly satellite with an ion thruster in the middle and liquid fuel engines attached radially, dV shown is above 10km/s, but actually feels like a few thousand...

so I simplify it and make a test prob:

- - - Updated - - -

- - - Updated - - -

change amount of xenon gas to 140 units so that the two engines burn about the same time.

Therefore adds additional 140 unit of Xenon gas and an ion thruster adds 4891m/s ?? It's not possible, just estimate it, using TWR and burning time.

I did some calcs: Isp=T/mdot/9.81=(2000+60000)/(0.04849+17.728)/9.81=355.53 (I think gravity on kerbin is same as that on Earth?)

but on KER and mechjeb it shows 794.7

I'm little confused now, can someone help? Thanks.

[Padishar]

Thanks for reporting this. There does appear to be a problem with the calculations when engines with different ISPs run at the same time. I will take a look and hopefully get a fix in the next release.

[KerbMav]

It is probably the negative ratio for Raddish that is confusing things, I wasn't aware that ModuleEngines supported that. What happens when you try it?

In the VAB KER shows 0 dV - on the pad too - while the engine is running dV readouts suddenly work.

Regretfully I did not pay much attention at the time because I was testing something else and only made a mental note.

[etheoma]

Says its an unsupported version with 1.0.3 but apears to be working, if you could update KSP-AVC Plugin when you get a chance its no big deal its not disabled it or anything.

[MathmoRichard]

Bug on 1.0.3.

This may or may not be new to 1.0.3 but I don't remember anything like this before myself.

KER doesn't show the different stages unless I have a (an asparagus/radial) fuel line where the centre booster lasts longer than the outer ones.

e.g. stage 10 should show below FILE HERE: http://s000.tinyupload.com/?file_id=31195768798299769350

Edited June 23, 2015 by MathmoRichard

[Red Iron Crown]

MathmoRichard, do the modders a favor and upload a log and your craft file (preferably all stock) somewhere and link it.

[MathmoRichard]

MathmoRichard, do the modders a favor and upload a log and your craft file (preferably all stock) somewhere and link it.

I will, thanks for reminding me

[Padishar]

The problem is that there is a slight rounding difference in the ratio between the amounts of each resource in the booster tanks and the ratio between the flow rates. This causes the booster tanks to be left with a small amount of one resource which prevents the simulation from firing the next stage. This results in the deltaV being calculated as if the boosters are not decoupled until the central engine also stops burning. If you replace the Jumbo64s with two X200-32s then the numbers work out slightly differently and the amount of one resource left is below the "empty threshold" and it calculates correctly.

This is a known issue and is among a number of issues that will be fixed in the next version. Hopefully this should be available quite soon...

[TokiTech]

Not sure if this is the right place to ask, but will 1.0.2 KER works on 1.0.4? I didn't dare to try to prevent certain "kraken" happening.

[Red Iron Crown]

Not sure if this is the right place to ask, but will 1.0.2 KER works on 1.0.4? I didn't dare to try to prevent certain "kraken" happening.

Seems fine so far.

[BlackHat]

Watched a lot of Youtube videos, and I recall seeing one of them where I "Thought" KER was showing CPA distance in the Rendezvous window. (As opposed to just current distance)

But looking through the settings I could not find it. Was I seeing something from an older version that has been dropped? or Another mod? (Maybe MechJab)