in Infrared Astronomy with Arrays: The Next Generation

A collapsible wheeled vehicle having a frame which includes a head tube and bottom bracket interconnected by a down tube. A seat tube, chain stay and strut are pivotally mounted on the bottom bracket. A first cable is connected at one end to the head tube and extends to the end of the chain stay with the intermediate portion of the cable engaging the strut. A second cable is also connected to the head tube and chain stay at its opposite ends, and the intermediate portion of the second cable is connected to the seat tube. When the cables are detached from the strut and seat tube, the vehicle may be collapsed.