Rotations and Tigers and Bears!

I'm trying to have a prim rotate in a way that it always rotates along the same local axis.

This is for a game I'm making and it will need to interact with physical objects so I can't use the omega functions.

Basically I want a spinning flap that always spins end over end. The problem is when I set it to spin correctly, if I change the orientation of it, it spins in crazy ways because apparently it's spinning relative to the world axes and not its own.

I'm afraid if I leave it like that the final orientation of the game will matter, which is not very desirable.

Here's what I have so far:

default
{
    state_entry()
    {
        llSetTimerEvent(0.5);
    }

    timer()
    {
        rotation rot=llGetRot();
        vector eul = <5,0,0>;  //5 degrees per cycle
        eul *= DEG_TO_RAD; //convert to radians
        rotation spin = llEuler2Rot(eul); //convert to quaternion
        llSetLocalRot(spin*rot);
    }
}

It looks like you're applying "spin" to "rot", when you should be applying "rot" to "spin".

Will this do what you're looking for?

rotation ROT_INCR = < 0.04362, 0, 0, 0.99905 >;  // 5 degrees around X

default {
    state_entry() {
        llSetTimerEvent(0.5);
    }

    timer() {
        llSetLocalRot( ROT_INCR * llGetRot() );
    }
}

Thanks for your help!