Transcript Document

Virginia Science Olympiad:
BUILDING EVENTS Div C
Building Events
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Egg-O-Naut
Elevated Bridge
It’s About Time
Mousetrap Vehicle
Trajectory
Mission Possible (States only)
BASICS TO REMEMBER
• Each device should be clearly labeled with the
team name and number
• All devices, except Egg-O-Naut, must be
impounded
• All events require protective eyewear
• Any student on the team may help build the
device (new)
• FOLLOW THE RULES!
NEW SAFETY REGULATIONS
• Under each event description there is now a section
for “eye protection” followed by a number
• Descriptions of what these numbers refer to appear
on the www.soinc.org under “events”
• For most events the regular lab goggles with indirect
vents will work (#4, ANSI Z87)
• For events with projectiles – Egg-O-Naut,
Trajectory, and Mousetrap Vehicle - #5 or high
impact goggles/spectacles must be worn – that is
they must be rated ANSI Z87+
Egg-O-Naut
Students
design a water
rocket out of a
2-L bottle that
carries an egg
Egg-O-Naut
• Students can bring 2 egg-o-nauts for
launching
• The 2-L bottle must be from a carbonated
beverage. Students must bring the label
from the bottle or leave it on the bottle
Egg-O-Naut
• Students add water to the bottle
• The bottle is launched at 75 psi
• The bottle (pressure vessel) must not be
damaged in any way – no scratches, no
super glue, only silicone or polyurethane
glue can be used
Egg-O-Naut Scoring
• The scoring is determined by time the
rocket is in the air
• 15 bonus points are awarded if the egg
returns to the ground unbroken
• 3 bonus points are awarded if the egg
detaches from the pressure chamber
• The best score of 2 launches is used
Egg-O-Naut Design
• Fins – keep the rocket stable; use 3 or 4
(but nothing within 5 cm of nozzle)
• Nose cone – helps reduce drag; the nose
cone usually contains the egg
• Recovery system - parachute
• Padding to protect egg (watch weight!)
Elevated Bridge
• Students design a
bridge with best
efficiency
• up to 15 kg of
mass will be
tested
Elevated Bridge - basics
Elevated Bridge - basics
Elevated Bridge - basics
• Important measurements:
–Must span 45-50 cm
–Must clear 30x12.5 cm in
center
–Max height of 20 cm
Elevated Bridge - basics
• Other things to note:
– No maximum wood size
– Must be wood (no bamboo,
laminates, etc.)
– Must support 5x5x2 cm block on top
mid-span
– Must be impounded
Elevated Bridge - scoring
• The score is pure efficiency:
• Efficiency = mass held
bridge mass
• Bridges that don’t meet specs are tested but
moved to tier 2
• Bridges that are untestable are in tier 3 and
ranked by mass
Elevated Bridge - tips
• Balsa has best weight to strength ratio –
order online for better pieces
(http://www.modernss.com/ has good balsa,
cutters, etc.)
• Glue adds the most weight – use sparingly
• Have students draw plans, cover with clear
packing tape and work on top of plan
• Build 2 identical sides, then connect
• Keep everything symmetrical, level, square
It’s About Time
• Construct a non-electrical
device to measure time
intervals between 10 and
300 seconds (Part I)
• Answer questions on the
concept of time (Part II)
It’s About Time - basics
• Must be impounded (new this year)
• All parts for the device must fit in a 80cm cube for
impound; other items may be brought in a separate
box for calibration, clean up, etc. but may not be part
of the actual device (there are penalties for mess!)
• Students will have 5 minutes for initial set up and 1
minute in between trials to prepare for the next trial
• Students may also bring a 3-ring binder (not
impounded), any size, with any notes hole-punched
into the binder
It’s About Time - scoring
• Each part is worth 50 points
• Part I:
– There are 5 time trials, each with a starting
value of 10 points
– Deductions are made based on how many
seconds off (to the 0.1 sec) the estimation is
– www.soinc.org has a spreadsheet and MP3 files
with tones to download for practice
• Part II: test format with questions about time
Mousetrap Vehicle
Students build
a vehicle that
is propelled by
1 or 2
mousetraps
Mousetrap Vehicle - basics
• Only unmodified commercial mousetraps may be
used with bases less than 6.0 cm x 12.0 cm
• The vehicle’s wheel base must be between 30.0 cm
and 34.0 cm. The wheel base is the distance between
the center of rotation of the front and rear axles.
• The vehicle’s maximum wheel width may not exceed
25.0 cm. The wheel width is the distance between the
outermost sides of the left and right wheels.
Mousetrap Vehicle - basics
• the device must work in 1 piece
• all energy must originate from the mousetrap
• the device must stop and reverse on its own
• only the wheels may contact the track
• a fixed pointed object must be on the perimeter of the
vehicle 1 cm from the track
• sighting devices that do not use electricity are
permitted
Mousetrap Vehicle – the track
7.00 m
8.00 m
3.50 m
Mousetrap Vehicle - basics
• students may start the device anywhere along the
start line (there is a bonus if the vehicle stays within
the 1.50 m track width)
• the vehicle must start by the touch of a pencil, pen,
dowel, etc.
• students have 10 minutes to set up and run 2 trials
• students may not follow the vehicle down the track
Mousetrap Vehicle - scoring
• lowest
score wins
• score = distance score + lane bonus +
overrun penalty + time score
Mousetrap Vehicle - scoring
distance score = (for vehicles that
reach the 7 m line and reverse) the
distance measured in cm (to 0.1 cm)
from the center of the starting line to
the fixed point.
If the vehicle only makes it past the 3.5 m line, 1000
points are added; if it doesn’t even cross the 3.5 m
line, 2000 points are added
Mousetrap Vehicle - scoring
•Lane bonus: -20 points for vehicles who’s fixed point
remains in the 1.50 m lane
• Overrun penalty: if the vehicle crosses the 8 m line
an additional 50 points is added for each .5 m
• Time score: the time of the run measured to 0.01 sec
x 1 at regionals and x 2 at states
(if the vehicle does not reverse it is time + 3 seconds)
Mousetrap Vehicle – other notes
• the vehicle must reverse in 3 seconds
• a recoil is not a reverse
• if the vehicle does not reverse it is moved to tier 2 of
scoring
• competition violations move the vehicle to tier 3
• if the vehicle does not meet specs it is moved to tier
4 of scoring
Trajectory
• Design &
calibrate a
catapult
• Data Collection
• Data Analysis
Trajectory - basics
• the entire device must fit within a 60cm cube
prior to testing
•the launching force must be supplied by a nonmetallic elastic solids
• teams provide their own projectiles (a list of
acceptable projectiles are in the rules)
• device + graphs + projectiles + anything
needed to perform a launch must be impounded
Trajectory - basics
• the launch area is 1 m wide x 1.5 m long – the
device can be placed anywhere inside the launch
area
• the device must be triggered from outside the
launch area – students may not touch the device
or enter the launch area during a trial
• the device must stay within the launch area
prior to and immediately after the launch
Trajectory - tips
• students should build early and test, test, test
• different projectiles need to be tested, different
distances, and graphs need to be made
• consistency is key – the device needs to be
lined up the same way every time
• some elastic solids lose elasticity over time;
beware that replacement material might test
different than the original
Trajectory - targets
• students have 10 mins. to make 2 launches at
each of 2 targets
• targets will be set between 2 m and 10 m (at 1
m intervals for regionals, .5 m intervals at states)
with at least 2 m between them and the nearest
target will be placed up to 2 m off the floor (in 1
cm increments)
• students must announce which target they are
aiming for before launch
Trajectory – bucket shot (new)
• after a first shot at a target, if the shot hits the
target students may request a “bucket shot” as
their second shot
• getting the projectile in the bucket has a big
reward – up to 100 deduction points
• however, a bucket shot means no 2nd shot for
the original target, and if the scoring comes
down to 3rd and 4th tiebreakers, teams with a
bucket shot are ranked below the others
Trajectory – scoring
Lowest score wins
Score = Lower Close Target Area Score
+ Lower Far Target Area Score + Graph
Score + Penalties – Bucket Shot
Deductions
Trajectory – scoring
Target scores are basically the distance
between center of target and where the
projectile actually hits in mm
Trajectory – scoring
The graph score is easy to get if students just
FOLLOW DIRECTIONS!
There should be 4 graphs.
• Each graph-table pair must be on a separate
sheet of paper and on the same side of the paper.
• Graphs and tables must be properly labeled.
• All variables and units must be identified.
• Each page must have the team name.
Mission Possible (States only)
• Design a RubeGoldberg type
device that
completes
certain tasks
Mission Possible - rules
• A list of tasks is given in the rules
• Students must start with task 4a :
Drop a standard golf ball from above the
entire device so that it is released into
the device and triggers a mousetrap that
will begin the chain of events.
Mission Possible - rules
• Students must end with task 4j :
Raise a flagpole with a rectangular
school flag (fixed or mobile) that is at
least 5 cm x 10 cm so that the lowest
part of the flag is at least 30 cm higher
than all original parts of the device
Mission Possible - rules
• All other tasks (4b-4i) can be completed in any
order – students turn in a task sequence list
• Other tasks may be involved, but will not earn
any score
• The device can run for a maximum of 3 mins.,
but only earns time points for 60 secs. at
Regionals and 60-90 secs. at States (2 pts/sec)
Mission Possible - tips
• This event is very different than what is was in
the past – READ RULES
• Find students with creative minds who know
electronics – no more than 10.0 volts per
circuit
• Electric components that can be used are
specified in the rules (no computers)
Mission Possible - tips
• Device must fit in 50 cm x 50 cm x 80 cm
imaginary box of any orientation – consider
building an open box for students to build in
• Stay away from liquids (if possible) and
hazardous materials
• Many points are gained for having the TSL in
the correct format, having the first task first,
and if it takes less than 30 mins. to set up and
run – at least get these easy points!
Mission Possible - scoring
• Highest score wins
• See rules for points breakdown and penalties
• Many points are gained for having the TSL in
the correct format, having the first task first,
and if it takes less than 30 mins. to set up and
run – at least get these easy points!