Transcript Slide 1

Florida Atlantic University’s
Human Powered
Submarine Team
Talon 1, 2011…
Meet the
Team!
Advisor – Dr. Edgar An
CHRIS NUNES, GEORGE VALDES, BRIAN TURK,
MIKE METZGER, CHARLOTTE GEORGE, ANDREW
HARRINGTON, MARIO MIRANDA, ADRIAN DESILVA
HEATHER DUPUIS, NICOLE PERRY, JASON
MCCULLOUGH,EVERETT JONES, JOSEPH SMITH
MICHAEL NEAL, ANDREW SPENCE, EVAN
STALKER, JOSH POTESTA.
• Our HPS TEAM encourages all students at FAU to take part in the
challenges presented to us.
• HPS Members must be a student at FAU and can join anytime from
their Freshmen to Senior Year.
• We take pride in our accomplishments but are always trying to make
things better no matter what the obstacle is.
2009- TALON 1
What’s New
• Improved Design
• Hull hydrodynamics improved
• All internal systems revamped
Goals
• Fastest and most maneuverable one-person
submarine, with propeller
• Set new Guinness World record for fastest one
person pedaled submarine
• Do the best we can with the given time
constraints
• Prepare for surprise problems that can
occur during the race
• Meet other sub-enthusiasts
• Generate public interest
Design Philosophy
• Extra attention given to creating
laminar flow over the fins and propeller,
in order to produce more thrust
• Reduce drag across entire hull.
• Improve existing systems based on
past experiences
• Counter balance propeller torque
internally
Fins
• Rear rudders positioned
out of the flow of the body
• Flat fins for uniform flow
and to reduce drag
• Fairings- horizontal
stabilizers and rudders
• Rear rudder, with fairing, is
parallel to the top of the
hull
• Laminar flow
Lift:
AV²(0.5)(Coefficient of Lift)(Angle of Attack)
Hull Fabrication
Step 1: Prepare Surfaces, Cut
front section.
Step 2: Space Shell Pieces 5
inches and secure.
Step 3: Fuse bottom half.
Step 4: Join rear top and bottom.
Step 5: Add aluminum support.
Bend Plexiglass to fit front.
Hull
• Elongated gertler
shape (from an AUV)
• 5 inch spacing added
longitudinally to the
hull to allow room for
pedal rotation and
other necessary
components.
Propulsion
• Recycled direct drive pedal
system utilizing a 3:1 ring and
pinion gear system
• Two mounting shaft brackets
with a plastic bearing mount
for smooth spinning
• Aluminum Propeller Shaft for
reduced rotational mass.
Drive shaft out of the submarine
Propulsion
• 14” long mount, 8” gear box
extension
• Driver can differentiate
between 5’6” and 6”
• Custom mount that fits to the
modified hull
• Adjustable crank arm
positions.
• SPD style bicycle pedals with
modified clip-in shoes.
Propulsion
• Our most efficient propeller
with foam tapered cone to
minimize drag on the hub.
• Aluminum prop. 22” long by 3”
wide with a 16 degree pitch to
give optimal propulsion
• Similar to an airplane
propeller
Buoyancy
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Size and design of sub left little room for placement of foam and trim
weights
Utilized two pound poly urethane foam maximizing buoyancy and interior
space.
5” spacer and the horizontal and vertical stabilizers reduce the torque effect
Natural up righting effect with placement denser materials below the midpoint
• Spacing and the positioning of the foam in the
upper radius was enough to completely
counter-act the torque caused by the propeller
Steering
• Cable driven steering
system utilizing dual
bicycle brake handles
to maximize pilot
ergonomics
• Elongated brake
handle used for dead
man system
incorporated into
steering to further pilot
ergonomics
• Driver restraint harness
Life Support
• Aluminum 60 or 45 SCUBA
tank
• Tank allows more than 2/3
leftover air volume at the
end of one run
• Emergency pony bottle
• 9 ft. low pressure
wreck/cave diving second
stage regulator hose
Safety
• Diver restraint harness
with dual orange release
buckles on each strap.
• Two-way latch release
bar
• Dead-man buoy system
with a short mechanical
delay
• Emergency pony
bottle
• Easy exit “clip in”
shoes with safety
straps attached to
velcro
• Vent holes in hatch
• Orange propeller tips
Dead Man’s Switch
• Spindle with
mechanical brake
• Motorcycle brake
handle
• Three inch PVC pipe
• Deadman handle
mounted to the
steering grip
Testing
Resin-materials testing
Faring Mold Model Used
Testing
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Dead Man brake became unreliable
-Fabrication of new dead man brake assembly and shaft.
• Steering failure do to excessive attack angle of fins.
-Redesigned steering system limits angle of attack.
• Sub had natural negative buoyancy due to the materials
(233 lbs in air, 80 lbs in water)
-Installment of foam to make buoyancy slightly positive.
-Trim weights used to achieve neutral buoyancy depending
on fresh or salt water.
• Original nose on submarine was hydro dynamically inefficient
-New Polycarbonate nosecone formed
Male mold for nose cone
Female mold for nose cone
Scuba tank placement in the tail
of the submarine, behind the
pedals and the gearbox
View from above the submarine,
of the tank in place, next to the
dead man’s switch
Bernoulli principle:
A(dx/dt)V = -A(p)
• Calculating the pressure differential proved 1,250 lbs of
force on the hatch
(1.87 lbs per square inch at 7 knots)
• Originally, one latch and one mounting pin was installed
but due to the anticipated pressure on the hatch, the sub
has been modified to three latches and three mounting
pins.
Budget
• Talon 1 2011: ~ $3825
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Hull: $45
Steering: $55
Windows/ nose cone: $75
Gear Box: $150
Travel: $3500
• Talon 1 2009: between $1500-$2000
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Hull : $1300
Steering: $200
Dead Man: $50
Fins: $120