Slide 1

TEAM MEMBERS: CHAD CHANDLER JOE COFER NATHAN ERAMIAN FRANCIS HAURIS JEFF WONG Slide 2 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 Slide 3 RESEARCH PHASE STUDY OF PREVIOUS DESIGNS Suspension Frame Drive Train SAE RULES AND REGULATIONS Slide 4 PREVIOUS FRAME & SUSPENSION PAST DESIGNDISADVANTAGES SIZE WEIGHT MATERIALS CONSTRUCTION Slide 5 PREVIOUS DRIVE TRAIN CHAIN DOUBLE REDUCTION ADVANTAGES Inexpensive DISADVANTAGES Stretching Failure Exposed to elements ADVANTAGES Consistent Reliable DISADVANTAGES Expensive Bulky/Heavy Slide 6 DESIGN PHASE Slide 7 SUSPENSION DESIGN PROCESS Lotus Suspension Analysis Double Wishbone Front Trailing Arm Rear Testing Modes Bump Roll Steer Slide 8 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 Slide 9 FRAME DESIGN PROCESS DESIGN PARAMETERSAUTODESK INVENTOR MODEL Lightweight Compliance with SAE Rules Multipurpose Beams Manufacturable Continuous Runs Slide 10 DRIVE TRAIN DESIGN PROCESS DESIGN PARAMETERS CVT 10 HP Briggs & Stratton Engine CVT Ratios 3.9 to 1 0.9 to 1 35 mph Slide 11 Slide 12 DRIVE TRAIN DESIGN RESULTS SOLIDWORKS MODEL GRADEABILITY~ 50 OPTIMAL REDUCTION 8.29 DYNAMICS15.7 ft/s Slide 13 PROJECT CURRENT PROJECT STATUS RESEARCH PHASE 100% COMPLETE DESIGN PHASE ~85% COMPLETE PREPARING FOR ANALYSIS PHASE PATRAN/NASTRAN FEA Slide 14 Slide 15 QUESTIONS ME 435 PROJECTS ME 435 PROJECTS