Lawn mowers employ rotary cutting blades that must be housed for safety reasons. However, the housing of the mower blades with a cutting deck can also enhance the general mowing experience when it is designed to implement other useful functions like directing grass out of a discharge chute or into a bagging attachment. To improve the air flow characteristics of such cutting decks, it would be desirable to provide a cutting deck that is both sturdy, such as fabricated cutting decks, and also has streamlined airflow characteristics, commonly found in stamped cutting decks. The invention thus provides outdoor power equipment comprising a frame an engine operably coupled to the frame and a cutting deck operably coupled to the frame, the cutting deck housing at least a first cutting blade and a second cutting blade, the first and second cutting blades being rotatable responsive to operation of the engine, wherein the cutting deck comprises a weldment comprising a top plate and one or more side plates defining a cutting chamber in which the first and second cutting blades are rotatable responsive to operation of the engine and a flow control assembly disposed within the cutting chamber and extending away from the top plate to define an airflow channel between the flow control assembly and the one or more side plates, wherein the flow control assembly comprises a first directional changing portion disposed proximate to the first cutting blade and a second directional changing portion disposed proximate to the second cutting blade, the first and second directional changing portions being separated from each other by substantially straight portions of the flow control assembly, wherein the first directional changing portion is passed over only by the first cutting blade and the second directional changing portion is passed over by only the second cutting blade, and both the first and second cutting blades pass over the substantially straight portions between the first and se
