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FAU Ocean Engineering

FAU Ocean Engineering. TALON 1. Abstract. Over the past few years, the FAU Human Powered Submarine Club has been working to improve their one-man sub, Talon 1 . Through continually refining and improving Talon 1 , it has remained to be a strong contender for multiple ISR competitions.

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FAU Ocean Engineering

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  1. FAU Ocean Engineering TALON 1

  2. Abstract • Over the past few years, the FAU Human Powered Submarine Club has been working to improve their one-man sub, Talon 1. • Through continually refining and improving Talon 1, it has remained to be a strong contender for multiple ISR competitions. • The mission of this project was to create a human powered submarine that achieves maximum speed in a short time over a straight distance.

  3. Introduction • The FAU’s Human Powered Submarine Club was founded in 1989, and through the years has competed in nearly all of the International Submarine Races. • At the 11th ISR, Talon 1 received 4 awards: • Absolute Speed • Fastest in Propeller • Smooth Operators • 2nd Overall

  4. Figure 2: CFD Modeling 3D View (Above) CFD Modeling Top View (Below) Hull Design • Elongated Gerler shape • 10 ft long, 25.75 in tall, 21 in wide

  5. Main Hatch • Location chosen based on CFD modeling • Accommodates most materials and divers • Reinforced to withstand pressure differential • 3 spring loaded latches

  6. Service and Dead Man Buoy Hatches • Located on the aft of the hull • Used Bernoulli’s equation: • 58 lbs force on rear service panel • 32 lbs force on dead-man hatch

  7. Fairings • Located on top, bottom, port and starboard surfaces • Major source of drag • Made with 2-part female mold • Easy Flo 60 Liquid Plastic • 1/2” threaded aluminum bars

  8. Windows • 4.96 ft2 of acrylic windows • 5 in band for aft visibility • Nosecone for forward visibility • 8 x 7 in window for downward visibility

  9. Figure 9: Hull Fabrication. Pre-fabricated hull from AUV was originally yellow Figure 8: Hull Fabrication Reference Hull Fabrication • Prefabricated sections from AUV • Fusion of 4 sections • Total weight 150 lbs

  10. Static Trim and Stability • Without foam, sub is 80 lbs negative • Addition of 1.75 lb/ft3 of extruded polystyrene foam provides for neutral buoyancy

  11. Propeller Torque • Produces a maximum feedback torque of 18.3 Nm • Designed to have a heavy side and buoyant side to counteract torque

  12. Propulsion System • Standard bike configuration with the addition of a sealed gearbox • 154 mm crank arms and twin blade propeller • Testing of pilots revealed the a speed of 120-156 rpm, with a lowest expected speed of 5 knots • Egg-beater style pedals allow pilot to push and pull on pedals

  13. Gearbox • Recycled from the FAU-boat • Constructed from aluminum block • 1:3 steel ground spiral bevel and pinion gear system powers the shaft connected to the propeller • Propeller is a long two bladed prop • Resembles airplane prop • Lack of skew

  14. Control Systems • Designed to minimize separation and flow disturbance • Flat leading edge • 7 degree rake • Fins positioned at the edge of the sub’s boundary layer and outside of prop radius

  15. Joystick • Fins are controlled by 2 axis joystick • Joystick is connected to fins by Teleflex cables • Cables can push and pull

  16. Design Aspects • Designed to be easily manufactured, assembled, transported, and repaired • Most manufacturing was completed on FAU Boca Raton campus • Local sponsors helped for more complex or specialized tasks

  17. Assembly and Transport • It takes 6 man hours to completely assemble and prepare the submarine • All systems are attached to the hull • Velcro strips allow for easily removable foam • Transported on composite cart • Propeller easily removed and stored during transport

  18. Reproducibility • Used common materials • Nosecone made of polycarbonate • Systems mounted with large easily removable brackets to allow for repair or modification • Gearbox quickly disassembles

  19. Figure 19: Hatch and Buoy Figure 20: Steering joystick with dead man handle in use Safety • 3 ft3 pony bottle strapped to pilot in case of emergency • “Dead-man” handle on joystick releases buoy • Quick releases on the restraint straps • Bright orange paint on fins and propeller • Strobe light

  20. Ergonomics • Redesigned 80 ft3 tank placed directly under the pilot • Gearbox moved to allow for taller pilots • Adjustable restraint straps • Air supply gauge located in front of pilot • Dive computer and compass help to keep pilot on course especially for beach test runs

  21. Conclusion • Talon 1 has evolved through several generations of club members • Design modifications have kept it a major contender through multiple competitions • It has been an invaluable source to learn many skill sets and a lot of fun!

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