Page Comparison

09/24/2024

Must haves for MS16:

• Length of 5.5-5.8

• Is maximizing length optimal?

  • Reduces pressure drag, increases friction drag

• Adjust split line between aerobody tub and roof

  • No negative draft

  • Split line at vertical part of the aerobody

• Canopy

  • Cut line changed

    • Needs to “flatten out”

Exteriors goals for MS16:

• Nose

  • Do not bring it up, keep it lower

    • Easier to manufacture

    • Not as much camber on the roof

    • Space for battery/other systems in the nose now?

• Bring Point where roof “hangs over” tub more towards the front

• Split line needs to be at a point where the roof and tub profiles are vertical

• Ensure tail is not “flimsy”

• Canopy

  • Increase canopy length

    • length/height ratio as close to 6 as possible

• Tail

  • Don’t come to a point, come to a box instead to fit license plate

  • Back panel in the layup with the tub

Research to be done:

• Teardrop vs straight side-edge bottom profile?

• Optimal CD/frontal area ratio

• Friction drag vs. pressure drag (what has the bigger effect in our situation)

10/01/2024

• Canopy

  • Task Idea: Parametric Model

    • Can eventually be extended to be a parametric model for the whole aerobody

    • Can be given to any members who have done onboarding

• Friction vs Separation Drag (how much can we extend the car by?):

  • In general, pressure drag should be the dominant drag component over friction drag [Goro Tamai: The Leading Edge].

  • On a solar car where pressure drag should be less noticeable, friction drag is more prevalent.

  • We should aim to eliminate our pressure drag before friction drag

    • Friction drag can be mostly overcome by achieving a smoother surface finish on the car.

• Dynamic wheel cover task doc complete

  • Review in meeting

• Teardrop vs straight side-edge bottom profile?

  • Need bottom and top profiles for the car first

  • make the dimensions for these parametric

  • Can start design with just these two shapes while waiting for other subteams

• Aerodynamics 101 NEXT Tuesday

• Potentially post SLDPRT file for design sprint #1

• Teardrop vs straight side-edge bottom profile?

  • Considerable difference in Cd, needs to be compared against the difference in frontal area

  • need to find optimal ratio Cd and frontal

• Wheel covers

  • up and down hinges (opening on the underside of the car)

• Design plan

• initial bottom profile wheel distance based on dynamic wheel cover calc is 333.2mm+track width. for now we assume tack distance is 850mm.

-new research task mock up(canopy length/solar)

-wheel cover design

-need to find optimal ratio Cd and frontal

-solar array layout task