Frame Trade Study Nathaniel Peza August 4, 2015

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

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

Rear Roll Hoop

RRH 1 RRH 2 RRH 3 11.55 lbs 12.22 lbs 12.22 lbs

Bracing Requirements

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 23.83 lbs Assuming the gear box will have approximate height of 8” or less Subject to change according to rear suspension

Rear Design 1

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

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 23.75 lbs

Rear Design 2

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)

Rear Design 3 Shorter rear than the Red Car 2015. This design is 22” long Weight of this design is 20.82 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

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

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

Rear Comparisons Rear 1 Rear 2 Rear 3

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 39.64 lbs Nose angles at 15 degrees from horizontal

Front Design 1

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

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

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

Miter, Fish Mouth, and Bend

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

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

Rear 1

Rear 2

Rear 3

Front design 1

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

Front Bracing Requirements

Rear Bracing Requirements