Aircraft including an airframe having a fuselage extending between a forward end and an aft end. The aircraft further includes a power plant mounted on the airframe producing exhaust during operation. The aircraft also includes a rotor/wing including a plurality of blades connected to a drive shaft rotatably mounted on the airframe and a radial inflow turbine mounted on the airframe in fluid communication with the power plant for receiving exhaust from the power plant. The radial inflow turbine includes a body forming an annular vortical chamber having an upper portion and a lower portion. The radial inflow turbine also includes a hub rotatably connected to the body and operatively connected to the drive shaft. In addition, the radial inflow turbine includes a plurality of vanes extending radially outward from the hub. The hub and the vanes are positioned in the vortical chamber.