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Published byTracy Daniel Modified over 9 years ago
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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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FSAE Competition Project based learning Competition 37 th /109 Fictional company Research Design Cost Recruitment
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2013-2014 vs. 2014-2015 Car 2013-20142014-2015 Performed well but: Cornering Suspension Intake Manifold Oversized Resolutions: Suspension redesign Intake relocated Frame reductions Braking Stability
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Frame 95 th percentile 10” diameter impact Safety factor above helmet Imaginary line from mid hoop to main hoop
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Frame
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2013-2014 vs. 2014-2015 Suspension 2013-20142014-2015 Pull Rod Poor cornering Limited adjustability Push rod Adjustability Steering articulation
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Camber Angle Critical Width of contact patch Negative improves handling in corners Prevent understeer http://www.benzworld.org/forums/w126-s-se-sec-sel-sd/1678465-rear-tire-wear-due-negative-camber.html
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Rear Suspension Change from Pull-Rod to Push-Rod System Suspension articulation will be increased A-Arms redesigned to eliminate bending moments
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Upright Design Weight Reduction Adjustability Room for Brake Caliber Attachment Adjustable Toe- In /Out
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Ackermann Steering Geometry Re-evaluated for increased turning radius
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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.
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Ackermann Steering Geometry Ackermann steering geometry may be generated by moving the steering pivot points inward so as to lie on a line drawn between the steering kingpins and the center of the rear axle. The steering pivot points are joined by a rigid bar called the tie rod which can also be part of the steering mechanism, in the form of a rack and pinion for instance. With perfect Ackermann, at any angle of steering, the center point of all of the circles traced by all wheels will lie at a common point.
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Wheels Carbon Fiber Wheels Over budget Wheel centers discontinued Research new Fabricate
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Brake Selection Moved to 2+2 Braking System Will utilize same calipers, master brake cylinders Different size Rotors for braking distribution Modifications to rear uprights necessary
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Selection Criteria Based on Car & Driver mass of 346.568 kg (Last years car + 90kg driver) 3 second stop time from 50 mph (22.352 m/s)
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Braking Force per Individual Brake 60% in the Front, 40% in the Rear Hardware has been chosen, Safety Factor must be verified The rear rotors still need to be designed
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