When you pull the trigger of a barbecue lighter, a piezoelectric crystal inside bends, and this bending action produces a spark. Piezoelectric use forms one of the future considerations for enhancing TDWG electrical output. When special piezoelectric coatings on the TDWG vanes bend during the blast of high speed air, they can be made to produce electrical energy. This energy can be channeled to power the magnetic bearings, or it can add to the generator's net output.