Sailing Drone

Inspiration from following:

• RCTestFlight's Autonomous Boat
  • Tool Chain
  • Pixhawk 2.4.8 kit

• Bearing 25mm bore
• Mast 25mm carbon tube
• Gear Generator

Other random thoughts

• Cartridge for mast/electronics/batteries
• Moveable mast sub-component for Center of Effort tuning

https://docplayer.net/80367011-When-designing-products-to-use-underwater-how-do-you-know-if-it-sinks-or-floats-use-these-solidworks-tips-and-tricks-to-find-out.html

Iteration 1:  Quick and Dirty -- Humpback's are good at going long ways efficiently during their migrations.  Maybe use that as a starting point.  Downloaded some 3d models of whales, concept to do an area rule and make hull shape similar.  Looked for research papers on hydrodynamics of cetaceans.  

• Hydrodynamics of Dolphins
  • An indicator of streamlining is fineness ratio (max dia/length)  4.5 gives least drag and surface area for maximum volume, although only 10% drag increase in FR of 3 to 7.  
  • Dolphin body form similar to 2d airfoil NACA 66-018.  Killer whale NACA 66-026.  Both laminar flow airfoils

Orca Images