1. Frame Trade Study
Nathaniel Peza
August 4, 2015

2. Frame Goals Follow all requirements in Rule Book
Lighter Frame (Reduce 15%)
Design around suspension
Simplification of welds
1” OD rear secondary members

3. RRH for all rear/front designs
Angles at 5 degrees from vertical
Height of 45 inches
Widest points at 32 inches
Bends are at 16 inches from the bottom
SIM members are at 14 inches
Bottom RRH 21 inches
Top is 27 inches
Seat harness member at 25 inches

4. Rear Roll Hoop

5. RRH 1
RRH 2
RRH 3
11.55 lbs
12.22 lbs
12.22 lbs

6. Bracing Requirements

7. Rear Design 1 Engine over gearbox compact rear
To prevent an additional member at RRH, the gear box can be held in a case
The engine will rest on this case
The weight of this design with RHH is lbs
Assuming the gear box will have approximate height of 8” or less
Subject to change according to rear suspension

8. Rear Design 1

9. Rear Design 1 Rear length of 15” Max gearbox height of 8”
Max gearbox length 11”
Secondary tubes are used in the frame rear
Primary square tubes to hold the gearbox and engine

10. Rear Design 2 Two platforms for engine and gearbox
Engine over gearbox compact design
Additional horizontal member must be added on RRH
Total length of 17 inches
Assuming gearbox has maximum height of 8 inches
Weight of this design is lbs

11. Rear Design 2

12. Rear Design 2 Assuming maximum gearbox height of 8”
Subject to change according to gearbox size and suspension points
Less complicated as Rear 1 and slightly lighter (0.08lbs)

13. Rear Design 3
Shorter rear than the Red Car This design is 22” long
Weight of this design is lbs
Engine next to gearbox design
This design assumes maximum gearbox length of about 6”
Subject to change according to gearbox size and suspension points
Smaller gearbox = shorter rear

14. Rear Design 3 Engine next to gearbox makes longer rear
About 3 lbs lighter than the previous 2 Rear designs

15. Rear Design 3
This design limits the length of gearbox, but not the height
Lower center of gravity

16. Rear Comparisons
Rear 1
Rear 2
Rear 3

17. Front Design 1 Each SIM are single and straight members to the front
Wider RRH to gain clearance
RHO and FBM are 16” apart
Total length of 54”
Weight of lbs
Nose angles at 15 degrees from horizontal

18. Front Design 1

19. Future Plans Find more frame designs
Filter frame designs and narrow it down
Adjust to fit interfaces such as human model, gearbox, and suspension
Frame analysis

20. Analysis Plans Front collision test Side impact test Rear impact test
Torsional test
Vertical impact test with suspension/shock points

21. Back up
RRH 1
RRH 2
RRH 3
Weight
11.55 lbs
12.22 lbs

22. Miter, Fish Mouth, and Bend

23. Clearances
Driver’s Helmet shall have 6 in clearance from the top and sides of the roll cage
Driver’s shoulders, torso, hips, thighs, knees, arms, elbows, and hands shall have 3 in clearances to the side surfaces

24. Racing Ergonomics
The driver’s line of sight must have a vision of the race track ahead
The steering wheel cannot be too far or too close to the driver. It will limit the range of motion
Knees must be bent at 120 degrees

25. Rear 1

26. Rear 2

27. Rear 3

28. Front design 1

29. Rear Configurations
For organizational purposes, 2 categories for rear configurations:
Rear configurations without front bracing
Rear configurations with front bracing

30. Front Bracing Requirements

31. Rear Bracing Requirements