Project smokestack

[gattispilot]

I am trying to make a smoke stack vessel. Basically a tower mesh with a flame coming out like the the one here in the Delta4 add on.
https://dl.dropboxusercontent.com/u/71242599/smokestack2.jpg
But this is what I get. When I place the tower no problem. When I fire the thruster. The tower leans down.

https://dl.dropboxusercontent.com/u/71242599/newsmokestack.jpg

SURFHANDLE     tex_main = oapiRegisterParticleTexture ("Contrail2-mod");

PROPELLANT_HANDLE TANK;
    TANK = CreatePropellantResource (FUELMASS);

    th_main = CreateThruster (_V(0,0,0), _V(0,-1,0), MAXMAINTH, TANK, ISP);
    CreateThrusterGroup (&th_main, 1, THGROUP_MAIN);

        AddExhaust (th_main,.5,.1,_V(0,24,0),_V(0,1,0));
    SURFHANDLE     fire_tex = oapiRegisterParticleTexture ("Contrail2-mod");

 PARTICLESTREAMSPEC fire1 = 
    {
        0, 5, 20, 20, 0.01, 8, -2, -1.0, PARTICLESTREAMSPEC::EMISSIVE,
        PARTICLESTREAMSPEC::LVL_PSQRT, 0, 2,
        PARTICLESTREAMSPEC::ATM_PLOG,1e-4, 1,fire_tex
    };

    PARTICLESTREAMSPEC smoke = {
        0, 2, 10, 150, 0.1, 0.2, 16, 1.0, PARTICLESTREAMSPEC::DIFFUSE,
        PARTICLESTREAMSPEC::LVL_SQRT, 0,1,
        PARTICLESTREAMSPEC::ATM_PLOG, -.5, .1
    };
    PARTICLESTREAMSPEC fire2 = {
        0, 20, 6, 30, 0.03, 1.5, 0.1, -1.0, PARTICLESTREAMSPEC::EMISSIVE,
        PARTICLESTREAMSPEC::LVL_PSQRT, 0, 2,
        PARTICLESTREAMSPEC::ATM_PLOG,1e-4, 1,fire_tex
    };
   // fire.tex = oapiRegisterParticleTexture ("Contrail2-mod");        
    


    AddExhaustStream (th_main, _V(0,24,0),&fire1);
        AddExhaustStream (th_main, _V(0,24,0),&fire2);

 

[dgatsoulis]

Have you tried making the tower so heavy, that the thrust from the main engine can't move it?

Another idea would be to change the engine group from main to hover.

 

[gattispilot]

Thanks. made the changes but same results.

const double FUELMASS = 100;
const double ISP = 2.5e5;
const double MAXMAINTH = .001;

	SetEmptyMass (550000000.0);

    th_hover = CreateThruster (_V(0,0,0), _V(0,-1,0), MAXMAINTH, TANK, ISP);
    CreateThrusterGroup (&th_hover, 1, THGROUP_HOVER);

        AddExhaust (th_hover,.5,.1,_V(0,24,0),_V(0,1,0));

 

[Loru]

    th_hover = CreateThruster (_V(0,0,0), _V(0,1,0), MAXMAINTH, TANK, ISP);
    CreateThrusterGroup (&th_hover, 1, THGROUP_HOVER);

and you can set thrust to minimum (1N) also you can set touchdown points really wide (50-100 meters apart)

 

[gattispilot]

Thanks

	SetTouchdownPoints  (_V(0,0,900), _V(-400,0,-900), _V(400,0,-900));; //28

But the same results.
Here is what my thruster looks like. Normally for hover it should be

th_hover[0] = CreateThruster (_V(0,0,0), _V(0,1,0), PB_MAXHOVERTH, hpr, PB_ISP);

But I want the exhaust to go up
https://dl.dropboxusercontent.com/u/71242599/smokethruster.jpg

 

[Urwumpe]

Why do you create a thruster for a smoke stack? Just add a generic particle stream (important: Invert direction relative to the thruster direction).

 

[fred18]

you can also simply put main thrust to 0, so there will be no effects and no fuel consumption

 

[Urwumpe]

you can also simply put main thrust to 0, so there will be no effects and no fuel consumption

Yes - but thats not needed. For the generic particle stream, you only need a double variable to set the intensity level.

For the thruster, you need this thruster, a propellant resource...

 

[gattispilot]

Got it to work.https://dl.dropboxusercontent.com/u/71242599/newstack1.jpg

Not sure how to adjust so it is like the one at the Delta 4 launch site