On Friday, January 28, 2005, at 03:49 AM, Siu Fai wrote: > I (and others) think that you need a battery as a power buffer to > increase the system efficiency and to reduce fuel consumption. The > turbine should run at a constant speed and load to optimize the > efficiency. The battery buffer is to cover load changes. That's exactly it! Thanks, Siu. Except that an ultracapacitor might also do the trick. Ardeshir <http://homepage.mac.com/ardeshir/AllMyFiles.html>