sentences:  Although introduced with much fanfare as a great leap forward in alternative energy storage and efficiency, press releases regarding the Patriot faded away.It was later revealed that serious problems with the mechanical integrity of the flywheel could not be overcome, and protection from a shattering flywheel would exact too much of a weight penalty.It is not to be confused with the Jeep Patriot, a 2007 SUV built by the same company.