2024-09-02 Mechanical Meeting

Announcements

• Budget Meeting is this Wednesday at 7:30pm

  • due tomorrow

• Info session #2 is tomorrow

  • arrive at 6:15 wearing your Solar shirt

  • room TBD, likely at UTC 2.112A if we can get access to the projectors

• LEADS: tba - might be delayed to another day or after info session

Budget

• Please make revisions by tomorrow night

• not enough links and justifications

• review sid’s comments and make revisions

Design Duration

• Designs for Daybreak were rushed

  • not enough research and validation was done

  • timelines were missed and design was constrained to ab a semester

  • bad/uninformed decisions were made

• We cannot repeat the same methodology for the new car

  • design season cannot be condensed into one semester - Gerard wants to extend design perhaps into march

  • take time to do proper research and validation to inform our decisions and avoid poor designs

  • Cesar’s proposal to condense aeroshell manufacturing into 3 stages

    • no need to rush molds

    • proposal to send the top shell mold first that is only affected by the array

    • when height is determined move onto canopy

    • bottom shell ready → can start sending bottom shell out to be manufactured

    • avoids compromising designs and letting the molds sit around

    • 2 months to get foam in and 4 months to waterjet

    • larger top shell this year and smaller bottom shell - ideas for connection still being developed - sizes are not dependent because this time to top shell will be on top of the bottom shell

• Onboarding should allow members to develop a strong foundation

  • likely will have one more meeting about onboarding before freshies arrive

  • new members will work on Daybreak - almost exclusively

    • returning members can start working on the new car but have 1 project manager / assigner for example

  • we should explain the car’s issues, but also inform them what good designs look like so they have a basis from which to reference

    • issues and good alternatives as a lesson / learning experience

    • give them resources and examples to show them what a good design should be - then review their designs

  • go though their designs and walk them through pros and cons, allowing them to revise afterwards iteratively until a satisfactory design is achieved

  • goal is to establish a good foundation of design intent and experience

• PDR / CDR will likely be moved later

Division/System Requirements

High Level Flowchart:

• https://lucid.app/lucidchart/0b7a6450-7f18-44b1-a9f3-90d0421b3f96/edit?viewport_loc=-256%2C291%2C2539%2C1128%2C0_0&invitationId=inv_4979a893-bb88-4897-99a6-8a473a5401f9

---> 2024-2026 Requirements Sheet

• https://utexas.sharepoint.com/:x:/r/sites/ENGR-LonghornRacing/_layouts/15/Doc.aspx?sourcedoc=%7B0BE91788-A3F5-403E-BD0D-335539E3212F%7D&file=2025-2026%20Requirements%20Sheet.xlsx&action=default&mobileredirect=true

Ideas

3 vs. 4 wheel

• suspension 101 https://cloud.wikis.utexas.edu/wiki/spaces/LHRSOLAR/pages/172426809 3 wheel stuff

• frame and aeroshell constraints?

  • rear suspension attachment

Composite Frame

have research done by saturday to gerard

likely will have presentation at workday

assignments:

Aeroshell

• wheel cover profile and attachment

• airfoil for suspension components

• drag force

• Look at good attachment mechanisms for frame to shell

Fergo

• designing chassis for rear trailing arm suspension - Josh

• figuring out brakeline routing in 3 wheel

• optimize CG location (roll cage, ballast position, driver position - leaning back?)

• - Kenta

Dynamics

• implementation of swing arm suspension for rear wheel - Kayla

• shocks

• suspension travel

• pullrod v pushrod

• THREE WHEEL BULLSHIT - Kayla

• 3 wheel steering characteristics for 3 wheel (Ackermann vs. Anti-Ackermann), correcting understeer in 3 wheel - evan

• unsprung - three wheel will increase the loads of the assemblies so they need to be lighter weight, rear unsprung changes - sami

• manufacturing related yapping - maybe whatever changes that we want to implement this year that has some relevance to our design intent - harshit

Emech

• pack manufacturing techniques and pack design (split design) - Parthiv