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Ashley Wyatt Xavier Thompson Matt Galles Bobby Costen Chris McHugh Randy Fulcher 2014-2015 ODU FSAE Car.

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Presentation on theme: "Ashley Wyatt Xavier Thompson Matt Galles Bobby Costen Chris McHugh Randy Fulcher 2014-2015 ODU FSAE Car."— Presentation transcript:

1 Ashley Wyatt Xavier Thompson Matt Galles Bobby Costen Chris McHugh Randy Fulcher ODU FSAE Car

2 Frame

3 Suspension Handle course impacts from imperfections Increase contact patch Dynamic system

4 Prior to designing: Camber angle Caster angle Kingpin Inclination (KPI) Steering axis angle Scrub radius Included angle Toe in Toe out Roll Center

5 Camber Angle Critical Width of contact patch Negative improves handling in corners Prevent understeer

6 Caster Angle Automatically realigns tires Improves ‘directional feel’ Adds negative camber during turns

7 Ackermann Steering Geometry  The intention of Ackermann geometry is to avoid the need for tires to slip sideways when following the path around a curve.  The geometrical solution to this is for all wheels to have their axles arranged as radii of a circle with a common center point.

8 Ackermann Steering Geometry  Rear wheels are fixed and a center point must be on a line extended from the rear axle.  This line intersects the axes of the front wheels and requires that the inside front wheel is turned, when steering, through a greater angle than the outside wheel.

9 Carbon Fiber Wheels Reduction in weight Increases fuel efficiency Higher tensile strength than most metals

10 Stats from Material Testing at Ohio State University https://kb.osu.edu/dspace/bitstream/handle/1811/58422/carbon_whe el_thesis_FINAL.pdf?sequence=1

11 Aluminum Rim Piece:Carbon Fiber Rim Piece: Moment (in*lbs.) =3900 Weight (lbs.) =7.1 Deflection Angle (Degrees)= Stiffness (in*lbs./Degrees) = Specific Stiffness (stiffness/lbs.) = Moment (in*lbs.)= 3900 Weight (lbs.)= 1.73 Deflection Angle (Degrees) =.21 Stiffness (in*lbs./Degrees) = Specific Stiffness (stiffness/lbs.)=

12 Rear Suspension Change from Pull-Rod to Push-Rod System Suspension travel will be increased A-Arms overdesigned to handle additional bending moments Upper A-arm carries weight of vehicle

13 Upright Design Weight Reduction Adjustability Room for Brake Caliber Attachment Adjustable Toe- In /Out


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