Hi all! I've created a new model for the spinning gyro (Instrumentation/gyro.*xx).
/** * Complex model of a spinning gyro. * * The gyro is driven by a torque. It is slowed down by bearing * friction and air friction. * The gyro disk is defined by radius [m], width [m], and * material density [kg/m�]. The disk is a solid cylinder. */ In the model I consider bearing friction torque to be constant. Air friction is only modeled for the outer rim of the cylinder, _not_ for the two flat sides. Modeling air friction for the sides is more complex as the velocity increases with the radius-- a point close to the rim has a higher velocity than a point close to the center. I suspect that the friction contribution from the two sides would be higher than from the outer rim surface, so I definetely should model this too. Any suggestions on how to model air friction on a spinning flat surface? The output for this model is angular velocity, angular momentum and a normalized spin. Angular momentum can be used to model gyroscopic precession. I only added normalized spin in order to be able to interface with the existing heading indicator and attitude indicator models. Now, I know that the existing gyro model and heading indicator and attitude indicator work great and that some might think that I am trying to fix something that is already working. I would argue that I am trying to improve on something that is already working ;-). But if nobody else share my point of view, I might abandon the idea. Comments are welcome! -- Roy Vegard Ovesen _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
