Team: Clyde Baker Ken Brown Alex Cherukara Kevin Eady Sponsor: Dr. Patrick Hollis SAE 1: Mini-Baja Four Wheel Steering

Problem Statement Reduce Turning Radius Applicable to Formula SAE Car Budget of $500

Needs Assessment As defined by group: –Turning radius of 7’ or less –Strong enough to withstand forces experienced during competition –Must not interfere with other components –Must remain stable –Least weight possible

Concepts How to achieve front to rear ratio? –Geometry: Easier to construct, more reliable, less components. –Gearing: Easier to design, identical geometry and components for subsystems.

Final Concept The complete concept is a combination of all other concepts. –Opposite wheel steering –30 degree front wheel angle –2:1 front to rear wheel angle ratio –Gearing to achieve ratio

System Configuration Layout/Operation of the system: –Two subsystems: Rack and pinion for front and rear, identical geometry and components. –Steering column fitted with 2” bevel gear. Meshes with 2” bevel gear on shaft to front system and 4” gear on shaft to rear system. –As steering wheel is turned the shafts turn. Front rack will travel 5” total, the rear 2.5”.

Front Steering Assembly

Rear Steering Assembly

Recent Design Changes

Current Work Completed course testing of present steering system to be used for qaulitative and quantitative comparisons

Current Work Received all ordered parts Began construction of steering system sub-assemblies

Future PLans Completion of steering system (sub- assemblies and full asssembly) Final testing Redesign and or fine tuning Downhill From Here