Abstract: A free piston engine used for providing power augmentation to an aircraft turbine engine. The engine has a central cylinder, a central piston, fuel intake valves and exhaust ports, for exiting hot exhaust gases. The exhaust gases are used to help drive turbine blades in the turbine engine. The piston includes a piston drive shaft with opposite ends attached to first and second ported push rods The push rods are attached to first and second intake pistons. The intake pistons can include magnets mounted thereon and used to generate DC electrical current. The central power cylinder includes first and second spark plugs connected to first and second ignition coil and used for igniting the fuel received through the ported push rods and moving the central piston back and forth inside the central cylinder.