Transcript Document

Springstead High School
Overview + Goals
 17 team members
 Two-manned sub for
increased performance
 Newest entry for
Springstead High School
 Participation from entire
team
Design Philosophy
 Maximum human power
 New drivetrain design
Hull Design + Fabrication
 Students laid out a full-scale
drawing of SubZero
 SubZero was designed to be
15ft long with a diameter of 24
inches.
 The hull of SubZero was
created from a male plug
constructed of plywood.
Hull Design + Fabrication (Cont.)
 The plug was sanded,
covered with visquen and
coated with mold release
wax.
 Two half-hulls were laid up
using two layers of 12oz. Biaxial cloth with one layer of
matt in between.
 The two halves were joined
together.
Propulsion Design +Fabrication
 The team worked with a
local machinist to create a
straight 6 to 1 gear drive.
 One pilot would be on
his/her stomach and the
other pilot would be on their
back.
 Stainless steel pipe for
driveshaft.
Propeller
 SubZero’s propeller was created from flat stainless steel
stock.
 It was heated red hot and forged into the shape dictated by the
Java Prop program.
 Additional strengthening and filling was done with tig welding.
 It was finished off with hand sanding and polishing.
Control Design
 SubZero has two vertical
and two horizontal control
surfaces that are actuated
by Teleflex cables.
 Three stabilizing fins.
Life Support Design
 Each pilot wears a spare air
on his/her chest.
 Two 30 cu.ft. scuba tanks
are mounted fore and aft.
 The front tank is located
directly below the pilot.
 The rear tank is located on
the ceiling above the pilot.
Safety
 The bow is heavily
enforced.
 Pilots are visible at all times
with a fore window as well
as an aft window.
 Hatches float freely when
released.
 Foot straps are clearly
visible with red cloth.
 Strobe light provides a
steady location.
Testing
 SubZero is tested in the
Gulf of Mexico as well as
the Weeki Wachee River.
 Dozens of testing hours has
been logged.
 This revealed numerous
needed to be resolved.
Training
 The SubZero team certified
7 new divers.
 Team members train using
stationary bicycles, actual
bicycles and running.
 Each team member was
trained in each support
position.