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TEAM MEMBERS: CHAD CHANDLER JOE COFER NATHAN ERAMIAN FRANCIS HAURIS JEFF WONG
BACKGROUND Originated in USC in 1976 Run by SAE Competitions include: Dynamic Events Static Events EVENTPOINTS STATIC300 Design Report50 Design Evaluation100 Cost Report15 Production Cost85 Presentation50 DYNAMIC700 Acceleration75 Pulling75 Maneuverability75 Rock Crawl75 Endurance400 TOTAL1000
RESEARCH PHASE STUDY OF PREVIOUS DESIGNS Suspension Frame Drive Train SAE RULES AND REGULATIONS
PREVIOUS FRAME & SUSPENSION PAST DESIGNDISADVANTAGES SIZE WEIGHT MATERIALS CONSTRUCTION
PREVIOUS DRIVE TRAIN CHAIN DOUBLE REDUCTION ADVANTAGES Inexpensive DISADVANTAGES Stretching Failure Exposed to elements ADVANTAGES Consistent Reliable DISADVANTAGES Expensive Bulky/Heavy
SUSPENSION DESIGN PROCESS Lotus Suspension Analysis Double Wishbone Front Trailing Arm Rear Testing Modes Bump Roll Steer
SUSPENSION DESIGN PARAMETERS Gross Vehicle Weight (GVW)520 pounds Weight Distribution Bias (F/R)45/55 Center of Gravity HeightLow as possible Lateral Track Width (F/R)47/46 inches Longitudinal Wheelbase60 inches Ride Height10-12 inches Tire Diameter23 inches Effective Tire Radius11.38 inches Static Camber Angle~ 0 to -1 degrees Static Caster Angle~ 8 degrees Scrub Radius0.5 to 1 inches Rack and Pinion Width~ 10 inches Toe Change in TravelMinimal Roll Axis InclinationNeutral to Slight Oversteer
FRAME DESIGN PROCESS DESIGN PARAMETERSAUTODESK INVENTOR MODEL Lightweight Compliance with SAE Rules Multipurpose Beams Manufacturable Continuous Runs
DRIVE TRAIN DESIGN PROCESS DESIGN PARAMETERS CVT 10 HP Briggs & Stratton Engine CVT Ratios 3.9 to to 1 35 mph
DRIVE TRAIN DESIGN RESULTS SOLIDWORKS MODEL GRADEABILITY~ 50° OPTIMAL REDUCTION 8.29 DYNAMICS15.7 ft/s²
PROJECT CURRENT PROJECT STATUS RESEARCH PHASE 100% COMPLETE DESIGN PHASE ~85% COMPLETE PREPARING FOR ANALYSIS PHASE PATRAN/NASTRAN FEA
QUESTIONS ME 435 PROJECTS ME 435 PROJECTS
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