Left: cool model M2 (hydrodynamic model) and M2B2 (MHD model). Right: hot model M7 (hydrodynamic model) and M7B1 (MHD model). Lines represent components of Reynolds and Maxwell stresses. Dotted and dashed lines represent horizontal and vertical components of Reynolds stresses, respectively, black lines represent the purely hydrodynamic models, while blue lines represent the same stresses in the MHD models. Red lines represent Maxwell stresses in the MHD models, and solid lines represent the sum of the stresses, with black representing the hydrodynamic model and blue representing the MHD model. Cyan lines represent viscous stresses. In hot models, magnetic stresses are negative (westward) near the equator and therefore act to reverse wind speeds.