Woo482's UMMU Plane

Woo482 · Jun 29, 2009

Sorry for it taking a while but at the moment we are tweaking the flight dynamics and adding some other things like sounds it shouldn't take too much longer to finish

---------- Post added at 09:13 PM ---------- Previous post was at 07:57 PM ----------

Does any one know what I need to change to increase the glide range ?

Code:

void VLiftCoeff (double aoa, double M, double Re, double *cl, double *cm, double *cd)
{
    static const double step = RAD*15.0;
    static const double istep = 1.0/step;
    static const int nabsc = 25;
static const double CL[nabsc] = {0.1, 0.17, 0.2, 0.2, 0.17, 0.1, 0, -0.11, -0.24, -0.38, -0.5, -0.5, -0.02, 0.6355, 0.63, 0.46, 0.28, 0.13, 0.0, -0.16, -0.26, -0.29, -0.24, -0.1, 0.1};
static const double CM[nabsc] = { 0, 0, 0, 0, 0, 0, 0, 0, 0,0.002,0.004, 0.0025,0.0012, 0,-0.0012,-0.0007, 0, 0, 0, 0, 0, 0, 0, 0, 0};
    // lift and moment coefficients from -180 to 180 in 15 degree steps.
    // This uses a documented lift slope of 0.0437/deg, everything else is rather ad-hoc

    aoa += PI;
    int idx = max (0, min (23, (int)(aoa*istep)));
    double d = aoa*istep - idx;
    *cl = CL[idx] + (CL[idx+1]-CL[idx])*d;
    *cm = CM[idx] + (CM[idx+1]-CM[idx])*d;
    *cd = 0.06 + oapiGetInducedDrag (*cl, 2.266, 0.6);
}

// 2. horizontal lift component (vertical stabiliser and body)

void HLiftCoeff (double beta, double M, double Re, double *cl, double *cm, double *cd)
{
    static const double step = RAD*22.5;
    static const double istep = 1.0/step;
    static const int nabsc = 17;
    static const double CL[nabsc] = {0, 0.2, 0.3, 0.2, 0, -0.2, -0.3, -0.2, 0, 0.2, 0.3, 0.2, 0, -0.2, -0.3, -0.2, 0};

    beta += PI;
    int idx = max (0, min (15, (int)(beta*istep)));
    double d = beta*istep - idx;
    *cl = CL[idx] + (CL[idx+1]-CL[idx])*d;
    *cm = 0.0;
    *cd = 0.02 + oapiGetInducedDrag (*cl, 1.5, 0.6);
}



// physical specs
    SetSize (11);
    SetEmptyMass (12000.0);
    SetCW (0.3, 0.3, 0.6, 0.9);
    SetWingAspect (1.7);
    SetWingEffectiveness (3.1);
    SetCrossSections (_V(2.28, 14.98, 2.48));
    SetRotDrag (_V(3.5,3.5,3.5));
    if (GetFlightModel() >= 1) {
        SetPitchMomentScale (1e-4);
        SetBankMomentScale (1e-4);
    }
    SetPMI (_V(6.42,17.23,10.77));
    SetTrimScale (0.05);
    SetCameraOffset (_V(0,-.335,3));
SetNosewheelSteering (true);
//SetTouchdownPoints  (_V(0,-.3477,5.7), _V(-3.448,-.3477,-5.0), _V(3.448,-.3477,-5.0));; 

//ATTACHMENTHANDLE P1;
P1 = CreateAttachment (false, _V(0,-.7,2.41),_V(0,1,0),_V(0,0,1),"PILOT",false);

EnableTransponder (true);


CreateAirfoil (LIFT_VERTICAL,   _V(0,0,-0.5), VLiftCoeff, 20, 270, 2.266);
CreateAirfoil (LIFT_HORIZONTAL, _V(0,0,-4), HLiftCoeff, 20,  50, 1.5);





    CreateControlSurface (AIRCTRL_ELEVATOR,     7, 0.5, _V(   0,0,-17), AIRCTRL_AXIS_XPOS,anim_ELEVATOR);
    CreateControlSurface (AIRCTRL_RUDDER,       2, 0.5, _V(   0,2,-15), AIRCTRL_AXIS_YPOS,anim_RUDDER);
    CreateControlSurface (AIRCTRL_AILERON,      4.8, 0.5, _V( 17.8,0,-17.8), AIRCTRL_AXIS_XPOS,anim_raileron);
    CreateControlSurface (AIRCTRL_AILERON,      4.8, 0.5, _V(-17.8,0,-17.8), AIRCTRL_AXIS_XNEG,anim_laileron);
    CreateControlSurface (AIRCTRL_ELEVATORTRIM, 11, 0.4, _V(   0,0,-15), AIRCTRL_AXIS_XPOS,anim_ELEVATOR);
    CreateControlSurface (AIRCTRL_FLAP,         5, 0.5, _V( 0,0,-1), AIRCTRL_AXIS_XPOS,anim_flaps);

Woo482 · Jun 30, 2009

here's a small video I took of the plane mainly showing off the animations

Oceanic · Jul 1, 2009

woo482 said:
here's a small video I took of the plane mainly showing off the animations

awesome!! i'm gonna have fun with this!

Woo482 · Aug 3, 2009

Would some one mind helping with coding this ? I can't get the wing profiles set up correctly

MJR · Aug 3, 2009

Wouldn't the pilot feel light headed?

the.punk · Aug 3, 2009

Have you a release date?
Or is there a beta to test?

Woo482 · Aug 3, 2009

Release date is if If I can get some help setting up the wings, some time in the next few weeks

the.punk · Aug 3, 2009

Cool to hear.

RisingFury · Aug 3, 2009

woo482 said:
Release date is if If I can get some help setting up the wings, some time in the next few weeks

Well... what's the problem? The actual code or the properties of airfoils, like where you set the point where the force grabs and so on...

Woo482 · Aug 3, 2009

just the properties, the wings don't have enough lift to glide it just drops to the ground

Woo482 · Aug 8, 2009

any one ? I really need help with this I cannot finish the addon without fixing this one bug

Woo482 · Aug 20, 2009

I'm thinking of releasing the addon as it is, there is only 1 problem and that is its not too good of a glider

Urwumpe · Aug 20, 2009

What is your lift function? Maybe you have too much drag and not enough lift.

Woo482 · Aug 20, 2009

all the lift things are up at top of this page but I've not opened the addon up recently so I've forgot exactly what they are

gattispilot · Aug 27, 2009

Urwumpe said:
What is your lift function? Maybe you have too much drag and not enough lift.

Here is the horizontal and vertical lift. Not sure where the drag is set?
void VLiftCoeff (double aoa, double M, double Re, double *cl, double *cm, double *cd)
{
static const double step = RAD*15.0;
static const double istep = 1.0/step;
static const int nabsc = 25;
static const double CL[nabsc] = {0.1, 0.17, 0.2, 0.2, 0.17, 0.1, 0, -0.11, -0.24, -0.38, -0.5, -0.5, -0.02, 0.6355, 0.63, 0.46, 0.28, 0.13, 0.0, -0.16, -0.26, -0.29, -0.24, -0.1, 0.1};
static const double CM[nabsc] = { 0, 0, 0, 0, 0, 0, 0, 0, 0,0.002,0.004, 0.0025,0.0012, 0,-0.0012,-0.0007, 0, 0, 0, 0, 0, 0, 0, 0, 0};
// lift and moment coefficients from -180 to 180 in 15 degree steps.
// This uses a documented lift slope of 0.0437/deg, everything else is rather ad-hoc

aoa += PI;
int idx = max (0, min (23, (int)(aoa*istep)));
double d = aoa*istep - idx;
*cl = CL[idx] + (CL[idx+1]-CL[idx])*d;
*cm = CM[idx] + (CM[idx+1]-CM[idx])*d;
*cd = 0.06 + oapiGetInducedDrag (*cl, 2.266, 0.6);
}

// 2. horizontal lift component (vertical stabiliser and body)

void HLiftCoeff (double beta, double M, double Re, double *cl, double *cm, double *cd)
{
static const double step = RAD*22.5;
static const double istep = 1.0/step;
static const int nabsc = 17;
static const double CL[nabsc] = {0, 0.2, 0.3, 0.2, 0, -0.2, -0.3, -0.2, 0, 0.2, 0.3, 0.2, 0, -0.2, -0.3, -0.2, 0};

beta += PI;
int idx = max (0, min (15, (int)(beta*istep)));
double d = beta*istep - idx;
*cl = CL[idx] + (CL[idx+1]-CL[idx])*d;
*cm = 0.0;
*cd = 0.02 + oapiGetInducedDrag (*cl, 1.5, 0.6);
}

Woo482 · Aug 28, 2009

there will be an update to this plane released in the next day or two

Woo482 · Sep 1, 2009

the new update is on Orbit Hangar.
New in this update:
The UMMU plane now has lights on the wings
The animation problem is fixed
Propellers stop working at high altitude
The UMMU plane now needs a UMMU attached to fly

liber · Sep 1, 2009

Rudder and aileron are incorrect animated.

gattispilot · Sep 1, 2009

What is wrong? I can fix the code as needed.

liber · Sep 1, 2009

gattispilot said:
What is wrong? I can fix the code as needed.

Banking plane right aileron animate for banking left,so as rudder,turn left animaton for right and no engin sound.

Orbiter 2024 has been released!

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