Hernando County Schools 11 th International Human Powered Submarine Race – June, 2011.
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Transcript of Hernando County Schools 11 th International Human Powered Submarine Race – June, 2011.
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Hernando County Schools11th International Human Powered Submarine
Race – June, 2011
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OverviewPrevious VersionsPhilosophy
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Single pilot Propeller Torpedo-shaped hull Pivot steering
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Started in 1991 as a two-person sub.
In 2003, a new, single-pilot sub was made for the 7th ISR.
Since then, it has been subject to many modifications.
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Focus on:◦ Improving and perfecting
Steering cable system New propellers
◦ Handcraft everything
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HullControl SurfacesPropulsionLife Support and SafetyHatch and Emergency Buoy
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Built for the 2003 ISR (22”H x 20”W x 11’6”L).
General form shaped with NACA 66-0015 coordinates.◦ Fiberglass shells crafted from mold
◦ Halves joined
Plexiglass (¼”) window installed. In 2007, knee pods were built into the hull.
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Cable-controlled rudder and dive planes steer the sub◦ Joystick control◦ Stationary horizontal
stabilizers Four stationary
pivot fins established a pivot point
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Propeller-driven◦ A bike crank turns a spiral bevel gear which turns
the prop. This year two new props were designed
◦ An MA409 wing shape was used to hopefully improve performance by 10% Bottom wing chord is concave to improve water flow off
the rear.◦ Both props are thinner and more polished, differing
in diameter.
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SCUBA◦ Air tank strapped in
the rear◦ Regulator and hose
fed up to front Spare Air Bow is heavily
reinforced
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The hatch lock is closed with a spring-loaded lock.◦ A safety cable connects to a latch-pin on the hatch
allowing quick release.◦ A clearly marked outside lever assures that outside
help has access to the pilot.
The emergency buoy is also spring-loaded.◦ Floats up when control lever is released.
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TestingTraining
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Primary testing locations ◦ Gulf of Mexico◦ Weeki Wachee River
Weeki Wachee’s clear waters offered the perfect testing environment.
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The new team members became certified SCUBA divers.
Weekly testing/training sessions with both submarines took place in the Gulf.◦ Learning the
loading/unloading procedure and how to pilot the submarine.
Sessions provided an abundant amount of swim and SCUBA practice time.
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Testing in the Weeki Wachee River
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Team with Sublime submarine
Team with SeaWolf submarine
Team members
not pictured in team photos