SMILE Engineering Transportation Challenge Weekend 2009 Objective • As hired consultants, your team will design and construct a crane prototype that can lift a Maglev train car onto the magnetic guideway track. Background • There’s a growing need for quicker and more efficient methods for moving people and goods. • Researchers have turned to using electromagnetic rails and trains: magnetic levitation or Maglev • One of the key principles in maglev design is reduced friction (which means reduced costs) Engineering Process • Identify the problem • Preliminary Design • Design Refinement • Construction • Test • Redesign for changes • Retest Crane Specifications 1) Lifting Mechanism of Crane: • Boom: must move right & left and up & down. • Hydraulics must be used for lifting load. • Use string for the cable. – The cable must have a winder (roller) mechanism that allows the lifting hook to go up and down. 2) Rotating Mechanism of Crane: • Boom rotation by mechanical means – not by directly turning with your fingers. – Turntable at base of crane. – Rotation is controlled by a gear system (allows boom to turn right and left). • You are allowed to hold down the base with fingers while operating the controls. – *Hint: The counterweight is the most important part of the mechanism used to balance the crane during lifting operations. Maglev Car Specifications • Your Maglev car design must accommodate: – A hook-up device (i.e. paperclip) for attachment to crane on the top of the car – Magnetic stripping on the bottom of the car – A red line across the front for testing When testing your Maglev car: • You may use your fingers to attach and detach your Maglev car to and from your crane. • It must operate without being pushed, touched, or interfered with once in place at the starting position on the track I. First Task: Design Process • 10:15-11:30 AM • Discuss and sketch out prototypes for your ideal crane and maglev designs. • Construction should begin only after the design has been perfected and all members of the group have agreed. Design Process cont. • Biggest Challenge: – Combining many different design needs into one result **Remember that you will have to compromise with one another and probably make changes to your designs along the way. Design Process cont. • When designing the Maglev, keep in mind: – 1) Balance (very important!) – 2) Placement and size of magnets – 3) Drag and aerodynamics – 4) Friction **Look in your packet for details II. Second Task Construction • 12:25-2:15 PM AND 3:00-5:00 PM Construction cont. • Division of Labor – Two people: • 1) Maglev Car • 2) Rotation of Base (crane) – Two people: • 1) Hydraulics to raise boom • 2) Boom – Two people: • 1) Crank to turn base • 2) Crank to raise and lower boom string w/ load Construction cont. • You can use the tracks at any time to test out your design. • When your Maglev car is ready, you can have a trial run down the track to make any last minute adjustments to your design. Tracking Cost • Before you start building the crane and maglev car, figure out the cost. • Modify your design if necessary. • Purchase extra materials, if needed, but be sure to keep track. III. Third Task: Testing • 6:00-8:00 PM Testing cont. • There will be two tracks: – 1) Stopwatch track – 2) Technology (IMU) track **You will be testing your prototypes on BOTH tracks. Testing cont. • When you are ready to test: – 1) Bring your crane and maglev car over to the Stopwatch Track – 2) Two people will operate the crane (one holds the base and the other operates) – 3) The other members will stand along the track at the markers with stopwatches Testing cont. – 4) Record data – 5) Repeat process for a total of 3 trials – 6) Go back to your group table to graph data and answer questions Testing cont. – 7) Take your Maglev car to the Technology (IMU) Track – 8) Remove your hook and place the IMU on your car (using the Velcro) – even distribution! – 9) Do a test run and look at the graph that the computer produces Testing cont. – 10) Sketch the graph in your packet – 11) Compare to the other graph that you made and answer questions. When you’re done… • You will display your graphs and question sheet next to the prototype at your table. SAFETY • All tools at the tool table are to be used at the tool table. • Utility knives are to be used ONLY by adults at the tool table. • Safety glasses must be worn at the tool table. TEAMWORK • Failure is an essential step towards success. Don’t be discouraged when something you worked on doesn’t work the first time. Just try again!
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