Complex sentence: Other studies (see Magnetic sail) have contended that drag will exceed thrust from such scoop designs, however, these neglected the momentum-conserving aspect of mirror capture and mirror reflection in the collection and exhaust streams of such systems.
Split into simpler sentences: Other studies (see Magnetic sail) have contended that drag will exceed thrust from such scoop designs. However, these neglected the momentum-conserving aspect of mirror capture and mirror reflection in the collection and exhaust streams of such systems.