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Credits

Huge shoutout to Connor Hawkins, Isabella Schneider, Mackenzie Lui and Mohamed Goha for helping and collaborating with me to create this design sprint! Hope everyone that participates has fun!

Sprint Goals

  • Get members accustomed to designing relevant components within the Aerobody and critiquing each other’s work

  • Making self-driven decisions throughout the entire process, starting from basic requirements + constraints, to selecting OTS components, all the way to sim validation.

    • This is very important as we anticipate to be designing with little direct supervision (i.e you can rely on leads so much; being able to think critically for ourselves is huge).

  • Getting comfortable with holding each other accountable to our own deadlines.

  • Documenting our progress and decisions.

Topics To Be Covered

  • Concept Sketches → Design → CFD Simulations

  • Intricate Solidworks CAD Design (Surface Modelling)

  • Material and Composites Manufacturing Technique Selection

Sprint Introduction

We are challenged with designing a full prototype Aerobody (main body and canopy) for a bullet style SOV, examples of this type of vehicle is pictured below. Dimensions and specifications are in the table below.

Specification

Value

Maximum Vehicle Dimensions

Coefficient of Drag

0.2-0.25

Maximum Solar Array Size

4 m^2

We DO NOT need to design around a full chassis, we are creating our Aerobody shape freely within the space of the maximum vehicle dimensions. However, in our design we should think about leaving space for a chassis and proper spacing for a driver. Any prototype and/or its features created within this design sprint can be potentially be used in building MSXV and possibly future vehicles!

Timeline

Note that independent reviews with leads and other members throughout this entire period are encouraged! You are not limited to just the scheduled reviews!!!

Phase 1 [March 1 - 8; ~2 weeks] - Review March 1st & March 8th @ 7:30PM EST

Phase 1 is all about getting some of the thoughts on how to solve the design, along with some of the key constraints/considerations to get ready for detailed design.

  1. Conceptual Design: Sketches of design concepts, with labels and descriptions where needed to effectively communicate design ideas.

    1. 1st week: completed concept sketches and vehicle dimensions

    2. 2nd week: completed first CAD iteration within SolidWorks

  2. Material Selection: Use past experiences and intuition to select materials for your Aerobody design (e.g. steel shouldn’t be used as the our Aerobody material because it’s too heavy based our power output constraints)

Phase 2 [March 15 - 22; ~2 weeks] - Review March 15th & March 22nd @ 7:30PM EST

Phase 2 gets into the nitty-gritty of the design. Does my design reduce flow separation and boundary layers? Is my coefficient of drag low enough? How are we going to make it? Is it cost effective? And plenty more questions. Hopefully by the end you have a fully designed prototype Aerobody that hits all the checkboxes.

  1. Detailed Design: Concepts should be finalized at this point and moved into CAD. An accurate model containing all properly dimensions and curvature. Ensure proper modelling techniques are used, the final CAD model should look exactly how it is expected to look in real life.

  2. CFD Simulations: Perform CFD Simulations within SolidWorks (or ANSYS) to analyze how air flows around your Aerobody and deduct conclusions about your coefficient of drag and overall flow separation on the vehicle

  3. Manufacturing Method: How will your part be made? Consider the tools we have in the bay and in the machine shop. Will this part need to be outsourced for manufacture? Ensure you determine one or more methods of manufacturing for your Aerobody (infusion, wet layup, prepreg, etc.).

  4. EXTRA: An extra task if you’ve finished and optimized your prototype Aerobody

    1. Panelization: convert your design into individual panels which you can make molds from and integrate together

**it is recommended to keep a design log (in google slides format) throughout this project of all decisions/choices made, the log will make finding the content to present easier come review day!

Sample Design Logs:

https://docs.google.com/presentation/d/10ylmWYR_Er4OoCQ5UJIiymEIGTLgjv72pMDDRAr9HMI/edit?usp=sharing

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