A reciprocating piston engine wherein the movement of a piston within the combustion chamber creates vortices in the fluid within the chamber and wherein the orientation of the vortices is more normal to the axis of movement of the piston than parallel to the axis of movement of the piston. The sootblower includes a combustion assembly configured to generate a pressure wave and a delivery assembly having an outlet for delivering the pressure wave into the interior volume of the combustion device. The circuit also provides for permanently setting the output by applying sufficient voltage and current to the transistor that permanent spiking of the metallized contact layer through the junction occurs. The semiconductor device includes a first gate formed over the substrate.