Abstract: In accordance with one embodiment, a parabolic trough system is disclosed to capture solar heat. It has low mass, high rigidity and precise robust rotational control. The trough does not require massive supports, since it use a “sandwich structure” where the core is lightweight urethane foam and the skin is made of aluminum sheet. The inside skin also functions as the parabolic reflector. The shape minimizes wind loads by centering the receiver in the parabola and by making the center of focus the center of rotation. The system can be rapidly built in the field since there are few parts. Assembly does not require heavy equipment. Support posts are used on both sides of the trough to minimize the anchoring requirements in wind loads. The trough bodies are rotated in a rotational control mechanism that uses circumscribing rings to support a continuous row of troughs that can sustain 120 mile per hour winds. Optical performance is improved with the drive ring design.