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ThorBeorn

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    Sigma Dimensions

    in KSP1 Mod Development

    Posted · Edited by ThorBeorn

    I am trying to import Earths atmosphere from RSS to a 10 x Kerbin using Sigma. However, I still get the scaled atmosphere from Sigma (using factor 1.5 in "Sigma/Dimensions/settings.cfg").

    What am I doing wrong here? 

    @Kopernicus:Final
{	
	@Body[Kerbin]
	{
		@Properties
		{
			radius = 6371000 // 1/10:th of earth, later rescaled x10 by Sigma
		}
		@Atmosphere
		{
			AtmosphereFromGround
			{
				innerRadius = 6307290 // 0.99 	radius = 6371000 m
				outerRadius = 6530280 // 1.025	radius = 6371000 m
				waveLength = 0.65, 0.58, 0.5, 1.0
			}
			ambientColor = 0.05,0.05,0.05,1
			lightColor = 0.65, 0.58, 0.5, 1.0
			
			maxAltitude = 140000.0
			
			pressureCurve
			{
				key = 0 101.325 0 -0.0119728
				key = 1000 89.9533 -0.0107930 -0.0107930		
				key = 2000 79.7002 -0.00972796 -0.00972796
				key = 3000 70.4681 -0.00875299 -0.00875299
				key = 4000 62.1611 -0.00787622 -0.00787622
				key = 5000 54.6878 -0.00708318 -0.00708318
				key = 6000 47.9713 -0.00636065 -0.00636065
				key = 7000 41.9464 -0.00569841 -0.00569841
				key = 8000 36.5557 -0.00509245 -0.00509245
				key = 9000 31.7442 -0.00453808 -0.00453808
				key = 10000 27.4653 -0.00402673 -0.00402673
				key = 12000 20.3414 -0.00312263 -0.00312263
				key = 14000 14.8737 -0.00237047 -0.00237047
				key = 16000 10.7635 -0.00176010 -0.00176010
				key = 18000 7.75613 -0.00126803 -0.00126803
				key = 20000 5.60721 -0.000901039 -0.000901039
				key = 22000 4.07935 -0.000642531 -0.000642531
				key = 24000 2.98525 -0.000462105 -0.000462105
				key = 26000 2.19595 -0.000334419 -0.000334419
				key = 28000 1.62339 -0.000243181 -0.000243181
				key = 30000 1.20625 -0.000177515 -0.000177515
				key = 35000 0.587912 -8.24999E-05 -8.24999E-05
				key = 40000 0.296475 -3.95921E-05 -3.95921E-05
				key = 45000 0.154505 -1.96895E-05 -1.96895E-05
				key = 50000 0.0823932 -1.02964E-05 -1.02964E-05
				key = 55000 0.0438116 -5.63015E-06 -5.63015E-06
				key = 60000 0.0226627 -3.07308E-06 -3.07308E-06
				key = 65000 0.0112639 -1.62393E-06 -1.62393E-06
				key = 70000 0.00535122 -8.22379E-07 -8.22379E-07
				key = 75000 0.00242788 -3.93412E-07 -3.93412E-07
				key = 80000 0.00106419 -1.78176E-07 -1.78176E-07
				key = 85000 0.000456540 -7.80320E-08 -7.80320E-08
				key = 90000 0.000192994 -3.33998E-08 -3.33998E-08
				key = 95000 8.14506E-05 -1.38984E-08 -1.38984E-08
				key = 100000 3.54530E-05 -5.71581E-09 -5.71581E-09
				key = 105000 1.63277E-05 -2.42049E-09 -2.42049E-09
				key = 110000 8.14746E-06 -1.04679E-09 -1.04679E-09
				key = 115000 4.54713E-06 -4.77713E-10 -4.77713E-10
				key = 121920 2.39321E-06 -1.98618E-10 -1.98618E-10
				key = 140000 0 0 0
			}	
		}
	}
}

    Edit: To be precise, this patch doesn't change Kerbins atmosphere. It remains at 70km x 1.5 = 105 km height. But I want it to be equal to Earths atmosphere, same height, same pressure at any given altitude etc. Oh and radius doesn't apply either, it remains at 6000 km after Sigma scales it.

    Official FAR Craft Repository

    in KSP1 The Spacecraft Exchange

    Posted · Edited by ThorBeorn

    You're right I also remember Ferram saying that, but I think he reintroduced the arrow due to people requesting it. Could be wrong though. Are you saying that your blue balls are lacking said lift vector? :P

    I've been installing mods manually for years, it shouldn't be that. And I'm not using many mod parts on this craft, perhaps it's the nose cone from SXT. But yeah, the numbers suggest almost neutral pitch stability yet it's obvious they are positive.

    Regarding take off speed, it becomes less unstable the faster it goes and becomes statically stable above mach ~1.2. Engine thrust doesn't have any noticable effect, it's vector is slightly above CoM even I reckon.

     

    Edit: I just started up a fresh game with only FAR installed. No lift vector on CoL here. Interesting...

    Edit2: Turns out it's the cockpit from Quiztech causing the issue. I guess I'll report this to Ferram or Quiznos, if it's not due to Quiztech not being updated since 1.05.

    Funny all my other planes not using this cockpit have been behaving quite predictably during high AoA according to my previous experience.

    Official FAR Craft Repository

    in KSP1 The Spacecraft Exchange

    Posted

    Tried pitching up the aircraft, CoP surely moves forwards relative to CoM as expected. At sea level, take off speed and 15 degrees AoA, pitching moment (Mw) turns positive. So does Mq (pitching moment not damping out) and Xu ("If Xu is incorrect, you have summoned the Kraken and should file a bug report." - Ferram).

    I don't know what to do about the Xu derivative. Also I don't understand why the pitching moment turns positive. (especially since static analysis suggests it's negative up to 30 deg AoA.) Any apparent design flaws? Horsontal stabilzer too far up?

    I'm a bit suspicious of the nosecone. I swapped it out for another one and moved the main wing back, which yield a pretty stable aircraft, too stable at supersonic speeds IMO.

    Official FAR Craft Repository

    in KSP1 The Spacecraft Exchange

    Posted · Edited by ThorBeorn
    imgur fail

    I thought I'd turn to this thread for some help with a plane I built. I've been using FAR for years and I've run into a problem where my plane is unstable in pitch, wanting to backflip/frontflip as soon as it has any positive/negative AoA after taking off. We've all seen this before. However I don't understand why, all derivatives suggests it's stable as does the static analysis. Moving the main wing back helps ofcourse, but I shouldn't have to right? Any ideas?

     

    [WIP] Mk 1 Fighter Cockpits

    in KSP1 Mod Development

    Posted · Edited by ThorBeorn

    @Mallikas: I just downloaded the mod, the cockpits look great!

    One thing though, FAR fails to voxelize the canopies on both parts (the Eurofighter has other issues with FAR as well), leading to very rough shifts in cross sectional area which makes the cockpits bad for anything above low/mid subsonic.

    I've seen this before, and I think it has to to with how the models are created - you may want to talk to Ferram about this if you want to make them compatible with FAR.

     

    Edit: I posted some pictures of it in the FAR thread:

    Hope you will decide to make your mod compatible with FAR in the future, it's too cool not to be used with FAR.

    Sigma Dimensions

    in KSP1 Mod Development

    Posted

    @Norcalplanner : Change the thermal sliders in the Alt+F12 menu under "thermal". With everything balanced to stock speeds, you'll run into trouble like this otherwise.

    Using RealHeat actually makes re-entry heating a lot lower in a 6.4 rescale since it's balanced for RSS/RO, hence RealHeat.

    Sigma Dimensions

    in KSP1 Mod Development

    Posted

    I have to say thank you to Sigma88 for this mod. It's really brilliant, fun and saves me a lot of time. Also it seems to work just fine with tweaking orbital parameters in Kopernicus.

    I just created my own custom sized kerbol system and changed orbits of kerbins moons in five minutes. :)

     

    [1.2.2] 10x Kerbol system development for Kopernicus: Version 6.3.0.1 - Update: April 14 2017

    in KSP1 Mod Releases

    Posted

    On 2016-02-14 at 1:54 PM, hanhan658 said:

    Can you make it more realistic by customize the sizes, for example make the radius of Kerbin to randomly 5865 km, Duna 3218 km... It's ''unrealistic'' to be so ''rounded'', and in further updates you can make this mod to replace the ISP of all the rocket engines (and all mods with rocket engines) to achieve the Delta-V needed With the same amount of fuel tanks!

    You can also in the next update change the atmospheric height of all the planets...

    Why would he? This mod is based on the stock kerbol system with all distances, radiuses etc increased by a factor of ten. Also even "rounded" numbers are just as likely to randomly appear as any other number.

    There are several other mods for changing isp's, besides that is outside the scope of this mod. One of the main reasons of having the kerbol system similar in size to our solar system is to have to build realistic sized rockets, with real life like payload fractions, no?

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