innovative vehicle design teacher training workshop saturday, sept 22, 2013
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Innovative Vehicle Design Teacher Training Workshop Saturday, Sept 22, 2013. I gotta’ teach what…?. Schematics Basic Electronics Battery Safety and System Requirement Calculations Design Calculations - Gear Ratios, Tire Sizes, Motor V/RPM, Velocity & Acceleration - PowerPoint PPT PresentationTRANSCRIPT
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Innovative Vehicle Design
Teacher Training WorkshopSaturday, Sept 22, 2013
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I gotta’ teach what…? Schematics Basic Electronics Battery Safety and System Requirement Calculations Design Calculations - Gear Ratios, Tire Sizes, Motor V/RPM, Velocity
& Acceleration Processes – Drilling, Tapping, Filing, Cutting, Hand Tools &
Safety The Purchasing Process Time-Line Softwares – What are the milestones, when is it
due, who’s responsible…Oh Boy!
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Where do I find all that stuff?• Remember…This is an educational and fun
experience.
• Use the internet!
• Mentors are Great!– Build that Bridge!
• Students are wonderful researchers! Pair em’ up and watch em’ go!
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Use the Math U know! Pick a common bike tire size in Dia “
16”…what is circumference? Pi x D How far around the tire? How long is a mile? How many times does the tire have to rotate
to travel a mile? If your top speed desired is 30 mph, how
many revolutions does the tire have to turn to cover 30 miles in 60 mins?
How many rpm’s should your tire turn???
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What gear ratio do we use?• Gear Ratio will be dependant on your
tire rpm…
• You’ve already selected a motor…what’s its rpm at 80%?
• Does your tire turn faster or slower than the motor?
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More ratio #’s… • For talking purposes… the motor
peaks at 3000 rpms at 24 volts.• 80% of that is 2400 rpms• Let’s say your tire rpm needs to be
740• Divide your motor rpm by the tire rpm
– 2400/740= 3.24 to every time your tire turns 1 revolution…so 3.24 : 1 is your ratio!
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Let’s pick the sprockets!• Remember your ratio of 3.24 to 1
• If your motor shaft is ¾ -1”, you can get 13 teeth around it easily, so let’s take a 13 tooth sprocket.
• 13 x 3.24 = 42.12 or 42 tooth sprocket for your axle…based on your numbers your sprocket set is a 13 and 42…let’s get em’ and try it!
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When we’re all done calculating…
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Motor Size
• Lots of Internet HP calculators!• Pick a weight for your vehicle, decide
on your top speed ( less than 35mph)• Give a time to reach that top speed
and the calcs will give you the HP required to make it happen!
• Go Shopping!
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What should this look like?• Many free design packages out there.
• ProDesk Top is one, easy to use and free, comes with tutorials.
• Many schools have SolidWorks.
• Design centers around???
• Aerodynamics!!! Lightweight!!!
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What does “Innovative” mean?
• To Introduce a new idea
• To use an existing product in a totally new way
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Have your student purchase items…• They all spend money!
• How is it done with a company’s $?
• Invite a “bean counter” to guest speak in class!
• Let students make the calls, get quotes, and write the purchase reqs!
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What’s Incoming Rc’vng Inspection?• Every Automotive company conducts it!
• Is what I recv’d, what I ordered?
• Sign off and then accounting gets the packing slip and BOL, why?
• That’s the Purchasing Loop!
• We get our stuff and everyone gets the $$$!
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IVD Guidelines
Questions?
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What can we expect at MIS?• A great experience!!!
• Bring 2 chaperones…• Have your MIS release forms signed and
ready to give to the gate attendant.• Bring signed photo releases and a
completed Project Synopsis form• Pick your pit stall and unload.
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MIS Inspections
• Inspections– Driver weigh-in with dry ballast 150 # min
– 30 degree Tilt test
– Brake lane test - 25 mph stop in 40 feet
– Helmet Regulations check – height, DOT
– Overall Inspection• You will rec’v an official checklist for your own
preliminary inspection at your sight
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MIS Events
• Your team will compete on one of four figure 8 test tracks for 30 minutes to test the durability of your steering, brakes and chassis structure.
• All teams will be on the “Big Oval” at 12 o’clock noon for the “Big Event”. This will be a one hour energy management event.
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Trophy Time!
• Drum rolls, Please! After the events are completed, the judging is tallied and voted on by the SquareOne Board…
It’s’ Trophy Time!
• Pictures and applause are encouraged!
• We should be out by 2:30 – 3:00 p.m.
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Questions?
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What Now?
• Next Steps (Refer to Appendix)– Assemble a team of students and volunteers– Get kids excited and find some big ideas– Assemble Gas Kart and Test
• Acceleration Rate, Top Speed, Range, Others…?– Install Electric Drive and Re-Test– Start Innovating– Have fun!– Ask when you need to!!! WE’re all here for
each other success! Remember, it’s all about kids!
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Their Story!
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Thanks SquareOne!!!