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Mini-Sub

Mini-Sub. Randy Draeger Grant Stockton David Upp. Problem Statement.

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Mini-Sub

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  1. Mini-Sub Randy Draeger Grant Stockton David Upp

  2. Problem Statement • As High School students, we have not fully investigated or implemented the concepts and applications of electronics, fluid dynamics, energy systems, mechanical systems, and calculus in the construction and use of submersible technologies

  3. Research • Ballast Systems • Hull Design • Propulsion Systems • Electronic Control • Servo • Power Source • Components

  4. Project Scope • Research, design and build submersible • Deliverables: • Submarine • Final Report • Final PowerPoint Presentation • Consult Experts: • Teachers • Hobby Experts • Hardware Experts • Less than $400

  5. Criteria • Must function underwater • Waterproof • Electronic components are protected (safety) • Movement with 3 degrees of Freedom • Ballast System • Maintain Neutral Buoyancy [still and motion] • Diving range 5-10 ft. (optional) • Video Feed (optional) • Lighting (optional)

  6. Constraints • Limited weight due to buoyancy • Limited Budgets ($400) • Materials must withstand underwater pressure • All materials must run off the same power source with the voltage drop • Depth is limited to tether line

  7. Possibilities • Submarine Vs. ROV • Ballast Tank Design

  8. Randy’s Design

  9. David’s Design

  10. Grant’s design

  11. Select an approach

  12. Design • Saddle Ballast Tank Design • Middle tube is dry • 2 outside tubes are the ballast tanks • Gas powered ballast • Motors and propellers on outside tubes • Camera on middle tube • Stabilizing Fin

  13. Construction • Work Process • Problems

  14. Construction (pictures)

  15. Safety Glasses In the navy

  16. Prototype • Design • Propulsion System • Propellers • Buoyancy System • Problems • Water Leakage • Center of Gravity vs. Center of Bouyancy • Design changes • Prop Adapter • Servo orientation

  17. Prototype (pictures)

  18. TEST plan 1 (specs) • Purpose • Keep submarine within constraints • Procedure • Measure dimensions • Expected results • Fit with 2x2x3 • Results • Fits within dimensions

  19. Test Plan 2 (Propelled buoyancy) • Purpose • Ensure buoyancy system is operational during motion • Procedure • Attain neutral buoyancy • Move with obstacle (cage) • Expected results • Pass with obstacle • Results • Never attained stationary bouyancy

  20. Test Plan (3 Degrees of freedom) • Purpose • Verify that submarine moves on all 3 axis • Procedure • submerge • Move through obstacle • turn • Back through obstacle • Expected results • Proper navigation through the obstacle course • Results • Never attained stationary bouyancy

  21. Test plan 4 (video feed) • Purpose • Check webcam is providing input • Procedure • Plug in webcam • Use geometric shapes to verify input • Expected results • Webcam provides input • Results • Webcam was water damaged

  22. Test plan 5 (Water proof) • Purpose • Procedure • Expected results • Results

  23. Waterproof problems • Problems • Epoxy and silicon sealant • Fiber glass casing • Re-fitting

  24. Test plan 6 ( Stationary Neutral buoyancy) • Purpose • Verify buoyancy while not moving • Procedure • Attain neutral buoyancy • Measure time at neutrally buoyant • Expected results • Prototype attains neutral buoyancy • Results • Never attained neutral bouyancy

  25. Test photos

  26. Test conclusions • Waterproofing • Buoyancy Issues • Further Refinements

  27. Refining • Waterproofing • Center of Buoyancy • Added Weight to Adjust • Water Inertia • Web Cam view • Tether Tension • Top Cap Screw • Outer Body • Fiber glass Shell

  28. Future refinements • Trim tanks • Different Canisters • Propeller Placment

  29. Lessons Learned (Randy) • Unforeseen Problems • Construction • Importance of calculations

  30. Lessons Learned (Grant) • Water Vs. Grant

  31. Lessons Learned (David) • Water is a challenge • Importance of physics concepts

  32. Summary

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