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unit9lesson3cleanmachines isyourcarclean whatismostimportant ifyouliveinabigmoderncity manywouldanswerthecar youwillfinditdifficulttogotoworkormovewithoutacar moreandmorefamilieshavetheirowncarsinordertomakelifemoreconvenient buthaveyoueverthoughtaboutwhatwouldhappentothecity themore thebetter testyourknowledgeaboutcars areyouinterestedincars ifso howmanydifferenttypesofcarshaveyouseenoryouknowabout talkaboutcarsinyourgroup talkaboutthecaryouknowbestinyourgroup thefollowingquestionsandthekeywordsinexercise2areforyourreference whattypeofcarareyougoingtotalkabout whatdoyouthinkisthemostimportanttoacar whatarethemainkindsoffuelusedforcars isthefuelusedforthecaryouaretalkingaboutfavorable what stheproblemwiththefuelnow haveyougotanyideatoimproveacar speakitoutandshareitwithyourfriends lookatthefollowingpicture what sit haveyoueverheardofasolarcar readtheinterview maybeyouwillfindsomethingspecial asolarcar readtheinterviewtolearnaboutthesolarcarracingandremembertocollectinformation acarwhichusessun senergyforpower whyarepeopleinterestedinsolarcars atuniversity howmanyraceshasmarielogantakenpartin itranacrossthewholeofaustraliafromnorthtosouth howlongdidtheracetake buildinganewcarwithateamfromqueenslanduniversity writingabookaboutsolarcars what sthemainproblemwithsolarcars theyaretoosloworunreliable whatdoyouthinkofthesolarracingcar wouldyouliketohaveatrytodesignoneofyourown improveyourformerdesign describeyourdesignofanewcartoyourfriendsandlistentotheirsuggestions ifyouarereallyinterestedinsolarcarracing readmoreaboutsolarcarracing extensivereading whatisasolarcar solarcar asolarcarisalightweight lowpowervehicledesignedandbuiltwithasinglepurposeinmind racing or raycing acombinationof race and ray fromthesun similartoanindyorformulaoneracecars solarcarsdonotrepresentapracticalmeansoftransportation theyhavelimitedseating usuallyone sometimestwopeople theyhaveverylittlecargocapacity andtheycanonlybedrivenduringtheday theydo however offeranexcellentopportunitytodevelopfuturetechnologiesthatcanbeappliedtopracticalapplications solarvehiclesrepresentingfivecollegeteamsleftcalstate sacramentoontuesdaymorningatthestartofasix day 670 mileracetolosangeles theyreachedstanfordviavallejo thesanfrancisco oaklandbaybridge afoggysanfranciscoandhighway280 readtolearnaboutsolarcarracing solarcarraceswereledacrossthefirst dayfinishlinebythewesternwashingtonuniversity svikingxx asleekcarunderaslantedarrayofsolarcellslikearoofofshinybluetile theviking whichreachedstanfordwithanelapseddrivingtimeof4hours 27minutes placedfifthinternationallyintheworldsolarchallengeinaustralialastnovember thecarsarepoweredbythesun buttheraceitselfispoweredbytheorganizationanddedicationofcollegestudents itstartedwiththestanfordsolarcarproject aloosecollectionof40orsostudentswhohavesofarbuilttwosolarcarswithalittlefacultyadviceandalotofhardwork graduatestudentdavecaditzspearheadedtheideaofaracethatwouldzig zagacrosscaliforniaandinspirethepublic sinterestinalternative poweredvehicles theamericansolarchallenge theamericansolarchallenge asc isacompetitiontodesign buildandraycesolar poweredcarsinacross countryevent in2005therewillbeaspecialeditionofasc the2005northamericansolarchallenge teamswillcompeteinasolarvehicleraycefromunitedstatesthroughcanada howtodesignasolarcar ifyouareinterestedinsolarcarracing pleasereadthefollowingtolearnhowtodesignasolarcar designingandbuildingasolarcar readandlearnhowtomakeasolarcar designingandbuildingasolarcarisanenormousprojectthatcantakeuptotwoyearstocomplete energyflowforasolarcar energyflowdiagramforasolarcar thesunlighthitsthecellsofthesolararray whichproducesanelectricalcurrent theenergy current cantraveltothebatteriesforstorage godirectlytothemotorcontroller oracombinationofboth theenergysenttothecontrollerisusedtopowerthemotorthatturnsthewheelandmakesthecarmove drivercontrols solarcarsdohavesomeofthestandardfeaturesfoundinconventionalcars suchasturnsignals front rear brakelights accelerator gaspedal rearviewmirrors freshairventilation andusuallycruisecontrol electricalsystem theheartofasolarcaristheelectricalsystemwhichismadeupofbatteriesandpowerelectronics theelectricalsystemcontrolsandmanagesallthepowerthatentersandexitsthesystem drivetrain thedrivetrainwillconsistoftheelectricmotorandthemeansbywhichthemotor spoweristransmittedtothewheelcausingthevehicletomove mechanicalsystems theyaredesignedtominimizefrictionandweightwhilemaintainingthestrengthneededtohandlethevariousroadconditions solararray
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