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[0.90] B9 Style Shuttle Wings V.1.3 (Updated at 01/10/2015)

gilbr0ther

By gilbr0ther
in KSP1 Mod Releases

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Infinity00

Infinity00

Posted
Posted (edited)

I have encountered a bug. Maybe. I don't know. I've built and flown (mostly successfully) three separate shuttles. I've done a runway launch and return test, and a pair of successful orbit and return (ok so I crashed within sight of KSC both times, but that was more because I suck at SSTO landings than a design flaw or bug).

So, my bug is this: In the SPH, I am attaching your wings to a B9 6 meter cargo bay. Once I get both wings attached, the center of lift node is off to the right of where it should be.

Here is an image of what it looks like with just the cargo bay and both wings attached exactly the same (thanks Part Angle Display).

screenshot6-1.png

It's very clear that there's something odd going on.

Here is an image of just the left wing attached.

screenshot8.png

Here is an image of just the right wing attached.

screenshot7.png

As you can see from the two images, the game appears to be calculating the center of lift correctly when only one wing is attached (at least, the lift ball appears to be in roughly the same spot above each wing when only one is attached), but when both are attached, something odd is going on.

For reference, I am using FAR, and have had no problems flying with it. In fact, your wings are amazingly stable. That's what is bugging me. In the SPH, the lift ball is off center by quite a bit. But my experiences and the FAR data suggest that nothing is really wrong. Here is a screenshot of my assembled shuttle design, with FAR stability derivates, along with Mechjeb vessel Info. Mods used: B9, Mechjeb, Klockheed Martian SSE, Novapunch. The B9 flap under the engines is probably helping move the center of lift back towards the center, which is why it's not as offset in the assembled craft as in my examples, which are literally just the wings and cargo bay.

screenshot10.png

Any ideas on what's going on would be great.

EDIT: It appears that it has something to do with where they are attached. I have been messing about with them, and they attach fine when you attach them near the center of the fuselage. If I attempt to attach them near the bottom of the airframe, the center of lift ball moves away from centerline. If I put them back in the middle, the lift ball realigns. How level they are appears to have no effect on the center of lift. So long as they are attached near the middle of any fuselage section, the center of lift is centered. Attach near the bottom, or god forbid the top, and the lift ball moves to one side of the craft. It could also be a bug with the B9 Cargo Bay, but B9 wings attach fine to it, at any angle and any location. I also noticed it on the S2 Widebody cargo bay, not just the standard cargo bay.

Edited by Infinity00
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  • 3 weeks later...
liquidhype

liquidhype

Posted
Posted

It would be nice if you made the wings one single part so that they became symmetrical. It is quite annoying to have to individually adjust each wing, and then have the same issue when trying to put on landing gear symmetrically. I've allready fixed this issue, but I was more thinking along the lines of making it easier for other people who are downloading this.

Awesome job btw!

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  • 2 weeks later...
MaLuS

MaLuS

Posted
Posted
It would be nice if you made the wings one single part so that they became symmetrical. It is quite annoying to have to individually adjust each wing, and then have the same issue when trying to put on landing gear symmetrically. I've allready fixed this issue, but I was more thinking along the lines of making it easier for other people who are downloading this.

Awesome job btw!

how did you fix the issue?

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skeevy

skeevy

Posted
Posted
Yes, how did he fix it... I have been looking for a way to 'fix' problems like that for awhile...

Cheers.

I'd assume using a solution similar to what Bac9 posted.

@gilbr0ther

Anyhoo, a bug report, FAR isn't implemented correctly, but it's an easy fix. All the parts need a similar fix and this is how B9 implements FAR into their parts (my fix is a modified-to-your-values copy/paste from some B9 wings). If you have sources online somewhere, I can fork and submit a pull request, if not, I can edit them all locally and post that...or you could do it yourself. Whatever's cool with you.

This is for the left shuttle wing. It should replace the entire FAR module (posted below this one).

@PART[wingshuttle_Left]:NEEDS[FerramAerospaceResearch|NEAR] {    
    @module = Part
    @maximum_drag = 0
    @minimum_drag = 0
    @angularDrag = 0
    !MODULE[ModuleControlSurface] {}
    MODULE
    {
        name = FARWingAerodynamicModel
        MAC = 5.0
        e = 0.7
        IsSmallCtrlSurf = 0
        MidChordSweep = 0.0
        ctrlaxis = none
        b_2 = 4.0
        TaperRatio = 1.0
    }
}

Copy and paste the above directly over this, completely overwriting it

    MODULE    {
        name = FARWingAerodynamicModel
        MAC = 5.0
        e = 0.7
        IsSmallCtrlSurf = 0
        MidChordSweep = 0.0
        ctrlaxis = none
        b_2 = 4.0
        TaperRatio = 1.0
    }

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drtedastro

drtedastro

Posted
Posted
I'd assume using a solution similar to what Bac9 posted.

Thanks for the info, however i have no idea of how to do what Bac9 did. Unfortunately I am not a 'blender / mixer / unity / mesh-thingies' code person...

All went whoooosh, right over my head.

But again, thanks for taking time to answer.

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skeevy

skeevy

Posted
Posted (edited)
Thanks for the info, however i have no idea of how to do what Bac9 did. Unfortunately I am not a 'blender / mixer / unity / mesh-thingies' code person...

All went whoooosh, right over my head.

But again, thanks for taking time to answer.

Neither am I, but I'm thinking about doing it myself. Editing parts is one thing, but I'm not a texture guy, that's for sure.

Aethergoddess had a decent post on adding textures and stuff to FSTextureSwitch that I came across yesterday (how the B9 parts do it/Bac9's suggestion). I'm gonna spend my next few hours looking into all of this just to kill some time while waiting on my favorite mods to be updated to 0.25.

I'm glad this post was bumped up today. This is exactly what I've been missing and needing in the wing department.

EDIT:

Set all parts to use FAR/NEAR in the form of a MM patch in the part's cfg (only took a few minutes once I bothered doing it)

Time to figure out textures and symmetrical parts...

Edited by skeevy
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  • 2 months later...
Space_nico

Space_nico

Posted
Posted

Hi everyone!

Those parts work good on 0.90. However, I noticed that the left aileron don't work even if all control ( roll + pitch + yaw ) are enabled.

Look up those photos ↓

1419268460-2014-12-22-00001.png

Turn to the left ↓

1419268457-2014-12-22-00002.png

Any issues? ^-^

Space_Nico

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gilbr0ther

gilbr0ther

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Posted
These are awesome. Any chance for a Mk3-alike wing, too? Or just B9? These are a bit small for a 3.5m shuttle, and I don't use B9 (it always breaks my game) so I only really use the tail fin/stabilizer. Which is worth it, by itself.

If you use Tweakscale plugin that you can use larger sizes, is compatible. But I have not tested the values of aerodynamics also increase proportionately.

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_Augustus_

_Augustus_

Posted
Posted
all i can say when i say the pictures showing what to do was:

i love you, you love me, lets get together and kill barney~

with an AK-47 and a two by four,

no more purple dinosaur.

... i had a bad childhood...

Same here, I'm not downloading the mod until that's removed.

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