Constraints and Criteria
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Constraints and Criteria
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Req. Num.CriteriaRationaleTresholdTargetStretchDate Added
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R1Car dimensions shall be 62" x 36" x 72" while containing driver [1.4]Stated in the rulesDimensions are exceededPower Wheels DimensionsN/A12/30/2016
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R2Wheels shall have pneumatic tires [1.5]Stated in the rulesNon-pneumatic tiresAir-filled tiresN/A12/30/2016
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R3Wheel base (axel-to-axel length) shall be at least 18" [1.5]Stated in the rules< 18"Power Wheels DimensionN/A12/30/2016
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R4Wheel track (wheel-to-wheel width) shall be at least 12" [1.5]Stated in the rules< 12"Power Wheels DimensionN/A12/30/2016
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R5Motor(s) shall be driven with at most 48V [1.7]Stated in the rules12V36VN/A12/30/2016
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R6Batteries shall not be LiPO/Li-Ion chemistry [1.8]Stated in the rulesNo batteriesSLALiFePO12/30/2016
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R7There must exist a throttle-controlled motor controller to transfer power from the batteries to the motor(s) [1.9]Stated in the rulesNo controllerESCMicrocontroller with ESC12/30/2016
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R8A unique number must be visible on the side of the car 1-5 digits long [1.11]Stated in the rulesNo numberAny Number70457 or 7712/30/2016
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R9A 6" x 1.75" label shall be present for the Moxie Board [1.12]Stated in the rulesNo moxie tagGeneric textNice Photoshop logo12/30/2016
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R10Front and rear bumpers shall cover 75% of the width of the car [1.13.1]Stated in the rulesNo bumpers75% coverage100% coverage12/30/2016
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R11Front and rear bumpers shall cover at least 1" of vertical space 4-6" from the ground [1.13.1]Stated in the rulesNo bumpersStraight barCurved bar12/30/2016
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R12Bumpers shall be covered in an impact absorbing material [1.13.1]Stated in the rulesNo coatingPool noodleRubber coating12/30/2016
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R13Bumpers shall not protect wheels of the car from side contact [1.13.1]Stated in the rulesWheels not exposedWheels exposedN/A12/30/2016
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R14The car shall extend beyond the driver in every direction when viewed from directly above [1.13.2]Stated in the rulesAny open sidesEnclosed cockpitN/A12/30/2016
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R15The car shall provide front and side protection for the driver's feet [1.13.3]Stated in the rulesNo protectionFront and side protectionN/A12/30/2016
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R16The car shall have mechanical brakes capable of a full stop [1.13.4]Stated in the rulesNo brakesMechanical brakesMechanical and motor braking12/30/2016
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R17Batteries shall be secured so that they remain in position in the event of a tip or roll-over [1.13.4]Stated in the rulesBatteries not securedVelcro strapsMetal tie-downs12/30/2016
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R18The car shall implement a kill switch that stops all current flow from batteries to the motors [1.13.6]Stated in the rulesNo kill switchKill switchN/A12/30/2016
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R19The kill switch shall be accessible from outside the car [1.13.6]Stated in the rulesNo accessible kill switchAccessible kill switchEasily removable and accessible kill switch12/30/2016
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R20The kill switch shall be easily identifiable as such [1.13.6]Stated in the rulesUnobvious kill switchRed kill switchN/A12/30/2016
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R21The car shall implement a fuse with a value such that the maximum possible power output is 1440W [1.13.7]Stated in the rulesNo fuse40AN/A12/30/2016
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R22The car shall implement front and rear LED lights [1.13.1(2)](Optional) Stated in the rules. For illuminated driving at nightNo lightsLED head and tail lightsRGB LED head and tail lights12/30/2016
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R23The car shall be able to drive in reverse [1.13.2(2)](Optional) Stated in the rules. For backing out of crashesOnly forward driveForward and reverse driveN/A12/30/2016
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R24The car shall implement an audible horn [1.13.3(2)](Optional) Stated in the rules. For funNo hornGeneric hornSelectable horn12/30/2016
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R25The cost of the car (excluding safety systems and power wheels toy) shall not exceed $500 (batteries are counted for 50% fair market value) [1.14]Stated in the rules> $500 chassis$500 chassis< $400 chassis12/30/2016
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R26The car shall reach a top speed of 20mphCompetitive speed< 20mph20mph25mph12/30/2016
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R27The car shall play musicFunNo musicMusic loud enough for driverMusic loud enough for spectators1/1/2017
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R28The car shall be able to make extremely tight turnsBetter performanceFixed axleOne-wheel driveDifferential1/6/2017
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R29The car shall switch between autonomous and human-controlled operation with minimal modificationEase of useComponents need to be added or removed when switching between drive modesComponents need to be rearranged to switch between drive modesNo components need to be moved to switch between drive modes1/6/2017
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R30Whole-system power, motor power, and computer power shall all be on enabled on separate switches.System control and safetyNo extra switchesRegular open toggle switchesCovered switches1/8/2017
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R31The car shall be able to determine the position of the steering wheel at all timesSystem monitoringN/AN/AN/A1/9/2017
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R32The car shall be able to determine its speed at all timesSystem monitoringN/AN/AN/A1/9/2017
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R33The car shall be able to determine the current draw of the drive, computer, autonomous motors, and batteries at all timesSystem monitoringN/AN/AN/A1/9/2017
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R34The car shall be able to determine battery voltage at all timesSystem monitoringN/AN/AN/A1/9/2017
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R35The car shall be able to follow the driver autonomouslyFun stuff (not required)N/ACapability not implementedCar follows walking driver within 3ft1/9/2017
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