Detailed isometric 3D technical drawing of a foldable catamaran frame for two Stand Up Paddleboards (SUPs). The frame is built using grey 50mm PVC pipes, 87-degree branch fittings, and internal aluminum reinforcers. In the center between the two SUPs (50cm gap), there is a central hinge mechanism allowing the frame to fold. Show two views side-by-side: 1) Fully opened 180-degree flat catamaran configuration on water with diagonal locking struts. 2) Folded 90-degree A-shape trolley cart configuration for land transport, showing two pneumatic wheels attached at the rear end. Clean white background, crisp engineering lines, realistic textures. Mehr sehen