HSRW Submarine-Team, Germany 2013 The Hull The Concept The Fins The Drive The Arms The Scale The Motion The Improvement The Pitch Limiter The Springs The Idea Safety Features Problems... Failed Designs Thank You ISR inspired by sailfish chord 20 cm / 160 cm span -> 1:8 aspect ratio max. thickness 25 mm wing profile NACA 0020 airfoil angle of attack 15- 25 lift coefficient fin material glass fiber reinforced polyurethane foam (Coosa nautical 20 / COOSA Composites LLC) high strength to weight ratio 45% lighter than plywood density of 320 kg/m 3 fin material cut by CNC fiberglass sheet in midsection as frame Floating hatch - Diver Breakable hatch - Shoes Easy access windows Non-jamming buoy Emergency Air Lower Fin Trolley Wobbling Mechanism Front End Buoyancy Sharp Fin Tips Buoy Relocation