Comments on hinge rotation speeds...

Hello, I'm hopeing someone has played with hinges enough in this way to coment on what I saw.

I made a flywheel type thing using a hinge. I wanted this wheel to constantly turn at a constant speed all on its own. So I scripted it to do llApplyRotationalImpulse() calls. When it is too fast, the script slows it down. When its too slow, the script speeds it up.

What I noticed is - the wheel always will want to turn with a 'speed' of 9.7 or 9.8. The 'speed' is what I get from llVecMag(llGetAccel()).

I tried to llApplyRotationalImpulse() with a small force <0.05,0,0> or a bigger force <0.2,0,0> and I always get the wheel turning the same rate. 9.7 or 9.8 - you can verify it visually too.

How can I get a constant *slower* speed? like a 4 or a 5

um that 'speed' you are getting is probably not speed. i bet if you looked at the vector it would be <0,0,-9.8> which is gravity.

to check the speed of the rotation, you need to use llGetOmega().

Hehe I know the 'speed' number is meaningless - it was just a number that I could use so I can talk about how fast the wheel spun, and compare different runs to each other.

llGetTorque always returned <0,0,0> - I didnt try omega. llApplyRotationalForce() affects accelleration I figure so I used GetAccel().

But aside from that measurement, a small force didnt turn the wheel slower, it turned it at the same 'speed' as a stronger force and you can *see* that, you dont have to use a number for that.

default
{
    state_entry()
    {
        llMoveToTarget(llGetPos(),0.1);
        llSetStatus(STATUS_PHYSICS|STATUS_BLOCK_GRAB,TRUE);
        llSetTimerEvent(1.0);
    }

    touch_start(integer total_number)
    {
        llApplyRotationalImpulse(<0,0,0.25>,FALSE);
    }

    timer()
    {
        llSetText((string)llGetOmega(),<1,1,1>,1);
    }
}

ok so i just ran this test, and i saw varying speed, up to a point. anything over about 19 looked about the same.

Thanks a lot for looking into that
I'll have to go see what the omega values I'm getting and why I didnt see what you saw