Indiana Science Olympiad Coaches Clinic 20122013 Dan Nichols Dnicholsnswhitingk12inus Adapted from 20122013 SOSI Event Parameters This event has two parts Part 1 vehicle testing and Part 2 written test on magnetism concepts ID: 331000
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Slide1
MagLevIndiana Science Olympiad Coaches Clinic 2012-2013
Dan Nichols
Dnichols@ns.whiting.k12.in.us
Adapted from
2012-2013 SOSI Slide2
Event ParametersThis event has two parts: Part 1 vehicle testing and Part 2 written test on magnetism concepts For Part 1: the vehicle(s) and any material needed to adjust the vehicle must be impounded prior to the start of competitionTeams may bring their own track or use the supervisor provided track. Teams may share tracks but must have different vehicles. Tools and track do not have to be impounded, but the supervisor needs to check the track for specifications before use. Z87+ high impact goggles must be worn by competitors during set-up and testing. Slide3
Event OverviewStudents build up to two self-propelled magnetically-levitated vehicles to move down a magnetic track. Main Goal: ConsistencyMaximum Voltage of Any Circuit: 9.0 V as calculated by their labelsVehicle size restrictions: length between 15 and 20 cm; height < 20 cm, excluding the dowel; width must fit a standard track (width of 2 9/16”) Slide4
Event OverviewStudents run their cars and develop data charts and graphs of the time it takes for their car(s) to travel between 50 and 95 cmThis data will be used to help predict a time score during the competition. Slide5
Vehicle SpecificationsMust be between 15.0 and 20.0 cm longMust have a height less than 20 cm (excluding dowel) Mass must be no less than
150.0
g
Car must fit on standard Mag Lev track (see next slide
)
No part of the vehicle, other than the propeller, may extend outside of the vertical planes of the track
No
rare earth magnets (can damage magnetic tape in the track
)
Car must have a 30 cm long 1/8” dowel vertically attached within 5 cm of its front edge or be able to accommodate the supervisors dowel
Vehicles may have up to 2 propellers and two motors. Motors must fit specifications in rules.
Car
must remain levitated throughout
runSlide6
One Option for the Track
Side rail height can be between
2.0
cm and 5.0 cm.
Track length must be at least five feet in length. Longer tracks are allowed, but only a five foot section will be used for competition.
Teams can bring their own sled and track and use them, as long as the supervisor verifies the track dimensions (width, length, etc.), similar to the ramp in gravity vehicle.Slide7
Another Option for the Track
This home-built track was used at the 2012 national tournament at a total cost of less than $30 and was not damaged in transport from Wisconsin to Florida via UPS.
Don’t mind the slight crookedness…this was fixed after the picture was taken. The side walls should be perpendicular with the track.
Track is only five feet long…easier for transport and storage
The instruction manual for creating this track will be available on the Mag-Lev page on the national websiteSlide8
The CompetitionTeams will have 8 minutes to predict the time of their vehicle(s), then orient their vehicles appropriately, adjust and repair their vehicle(s) and make two successful runs on the track Competitors must place their vehicle on the track directly before the start line of the timed portion. A pencil is used to hold it in place.
Competitors
will indicate when they are ready and turn on their motors. Vehicles are not allowed to be touched once the motors are turned on.
The supervisor will give a “3, 2, 1, launch” the competitor must the release the vehicle by removing the
the
pencil and stepping away from the track. Slide9
The Competition (cont.) Teams may use the same car for both runs or elect to use a different vehicle for the second run, but they may not change the predicted time. If the car does not move in 3 seconds or the vehicle does not travel the entire distance, the team is allowed to restart without penalty as many times as possible in the 8 minute time frame.Slide10
National Track Setup UW 2011
Vernier photogates were used with lasers.Slide11
Test PortionThere is also a written test on magnetism. Topics to be covered include:Polarity
Earth’s Magnetic Fields
Electromagnetic principles
Magnetic vs. non-magnetic materials
Common uses of magnets
Historical Development of Magnetic Theory & Technology
Superconducting
MagLev
Transportation Technology
Magnetic
Force
Electric Motors and Generators
Solenoids
Magnetic DomainsPermenant magnetsFerromagnetic materialsMedical uses of magnets and superconductorsSlide12
Cost of the EventA common concern is the cost of this event
Many schools already have
Mag
-Lev tracks
My school in Wisconsin had one in our old Technology Education room that met specifications.
A neighboring school has three tracks that all met specifications.
The cost of making a track can be shared with the Science and/or Technology Education Department
I use my track in Physical Science and AP Physics B classes
Instructions for making a track to meet all specifications for less than $30 are available on the national website. One of these tracks were used at the National Tournament in 2012.
Successful cars can be made inexpensively
The car that was the WI Div C state champion in 2011 only cost $9.50 for the parts not including two 9V batteries. Students can be very creative and build a successful cheap car!Slide13
Other Event ConcernsOne common concern with this event is that too many cars get “stuck” in the track and can’t travel down the entire distance…the following modifications were made to last year’s trial rules:
Students have 8 minutes instead of 5 minutes
Students can bring and impound their own track and sled to use, after verification by supervisor
Students are given an ideal time and adjust their sled mass, allowing teams to get down the track and get in Tier 1 even with very light sledsSlide14
Vehicles “stuck” in the trackMake sure your students closely investigate why their vehicle stops in the track.
Is the car really stuck due to a width issue, or is the car twisting in the track?
Is their motor/battery/propeller combination too weak, not giving their car enough thrust to overcome some friction on the side walls?
Is the car’s center of mass too high and the stability of the vehicle low during its run, causing it to tip over?
The most successful teams in this event know their cars, how to modify them, and understand how balance, torque, and center of gravity are all related on their specific car(s).Slide15
Resources AvailableGreat website from New York, but beware of the rules changes for 2013:http://newyorkscioly.org/SOPages/COTResources.htmlMany resources will be posted on the National
www.soinc.org
website as well, including a sample scoring worksheet and EXCEL spreadsheet for use by event supervisors to compute team scores and an impound checklist.