Transcript Presentation

Suspension
•Peter Morabito
•Michael Paliga
•Brian Ross
Drivetrain
•Kenny Elliot
•Patrick Mooney
•Dylan Quinn
Frame
•Dan D’Amico
•Curtis May
•Greg Schafran
To design a vehicle for the SAE Baja Competition
Gear Ratio Calculations
[Veh. wt]*[Sin(incline angle)] = Repelling Weight
[650 lbs]*[Sin(40 degrees)] = 418 lbs
Rep wt = (tire rad)*(CVT ratio)*(engine tq)*(X min)
418 lbs = (1.0 ft)*(3.85)*(14 lb-ft)*(X min)
----->Xmin= 7.7551
Stage 1 - 2.0:1
Size: 20/40 teeth
Pitch: 12
Face Width: 1.0 in
Stage 2 - 4.0:1
Size: 20/80 teeth
Pitch: 12
Face Width: 1.5 in
6.5 inch diameter output gear
allows room for differential
mounting to increase vehicle
handling.
Front Suspension
•Basic Double A-arm setup
•Same overall design as previous
years car
•No significant changes, just
modifying to fit newly designed
frame
Rear Suspension
•Using a rear trailing arm set up
similar to the 2012 car
•Eliminating the dynamic toe aspect,
but maintaining the dynamic camber
•Improving wheel travel and reliability
REAR
ASSEMBLY
FRONT
• Steering wheel angle vs. steering angle (front
left)
• Motion is of a body roll
• Camber angle (rear right)
• Motion is of a body roll
• Camber Angle (rear right)
• Motion is of a jump
• Camber angle (front right)
• Motion is of a jump
FEA - Stress
TRAILING ARM
1’’ X 0.065’’ 4130 STEEL
FEA - Displacement
FEA - Stress
UPPER A-ARM
1’’ X 0.065’’ 4130 STEEL
FEA - Displacement
FEA - Stress
LOWER A-ARM
1’’ X 0.065’’ 4130 STEEL
FEA - Displacement
Fox Float Racing Shocks:
 Adjustable air spring, velocity damping control, and light weight.
 Reduced Cost - $521.25 per pair versus $859 per pair for Custom Works
Shocks.
 Comparable performance
Frame- Methods
•SAE standards
•Firewall
•Front end
•Roll cage
•Rear end
•Finite Element Analysis
Frame- Analysis
• The 2012 ODU Mini Baja (55th place) weighed 479
pounds
• Cornell’s car (3rd place) weighed only 306 pounds
• Reduce frame size and weight
• Eliminate redundant members
Frame- Results
Material-4130 steel tubing:
primary members:
1.25”x.065
secondary members:
1”x.065
Shorter overall length
Lighter than previous ODU
cars: 63.7 lbs.
Frame- Results
Frame- Results
Frame- Results
Frame- Results