Abstract: A reciprocating engine utilizing the mutual repulsion of charged air particles to drive a work-producing means. The engine has pistons reciprocating in cylinders with cylinder spaces between cylinder heads and the pistons. A first enclosed porous conductive electrode is located in fluid flow communication with the cylinder space, typically within the cylinder space itself. The first porous electrode is electrically connected to a second conductive porous electrode in a separate housing. Air is admitted into the first electrode while fuel is admitted into the second electrode. As the air in the cylinder space and first electrode is compressed as the piston moves toward the cylinder head, a current flow takes place from the first electrode to the second electrode because of valance attraction between fuel molecules and oxygen electrons resulting in the ionization of oxygen and fuel.

Abstract: Attenuating structural honeycomb sandwich panels with a cellular core having a portion of the adjacent cell walls removed forming an enlarged cell area positioned between and bonded to two facing sheets. The sheet adjacent the enlarged cell area is imperforate. The other face sheet remote from the enlarged cell area is perforate. Each enlarged cell area communicates to the atmosphere through a single perforation in the perforated sheet.