Denny Esterline wrote: > Much good has been said, but all seem to have missed an important > aspect of the control equation - the generators have field coils. No, it wasn't missed since it wasn't relevant to the discussion. The outpu= t voltage is a function of the excitation field strength, but has no bearing on the speed of a unloaded generator. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .