Aerobody

Lead	Members	Reviewers	Status
Shalin Patel, Clarke Vandenhoven (Deactivated)	Connor Hawkins (Unlicensed), Hamza Abuabah, kaizen liu		IN PROGRESS

Problem

Problem Statement	Build a lightweight and aerodynamically efficient Aerobody
Goals	Aerodynamic efficiency will lead to reduced power requirements, this allows us to travel further with the same amount of power.
Constraints Regulations	Top surface area of 5m^2 to accomodate array (If curved, then only in 1 plane) Max dimensions (L x W x H): 5.0m x 2.2m x 1.6m
Criteria	Coefficient of drag (C_d) < 0.15 Frontal area (A) < 1.5 m² Large enough to accommodate 4 people
Requirements	Minimize molds Minimize cost Highly durable

Reference materials

CFD (Page with all resources related to CFD)
https://www.autodesk.com/education/free-software/alias-autostudio - Alias Speedform Student Edition (We use the 2018 version)
https://www.ara.bme.hu/oktatas/letolt/Vehicleaerodyn/Vehicleaerodyn.pdf

Scope

	Activity
Must have	Research Design Sketches Surface Model Solid Model (Solidworks) Molds Panelization CFD Analysis Verification Detailed design Mounting points Windshield and window cutouts Flanges at connections Wheel Fairings Array Mounting Manufacturing Molds Panels Trimming Finishing Integration Doors Lights Cameras Windshield Windows Mounting to Chassis Sealing all panel gaps
Nice to have	Small scale wind tunnel testing (Inset array?)
Not in scope	Full scale wind tunnel testing

Milestones and deadlines

Milestone	Date	Status	Notes
Concept Sketches	23 Sep 2018	DONE	Concept generation
Final Sketch	30 Sep 2018	DONE	Converge to a final look
Preliminary Model	14 Oct 2018	DONE	Rough model to give us an idea of how the car might look (3D model to work out rough space requirements)
CFD Learning	17 Oct 2018	DONE	Prof. Peterson First Meeting
Surface Model Complete	11 Nov 2018	DONE	First surface model + render to show the end goal
Packaging Review	18 Nov 2018	DONE	Review all system packaging requirements
Aerobody End of Term Review	04 Dec 2018	DONE	Aerobody review with Adem and Nathan (Minnesota/Stanford Alums)
End of Term Model	21 Dec 2018	DONE	Model with clean surfaces and "easy" to control
Improved Aesthetic Model	16 Feb 2019	DONE	First look at a realistic aesthetic model and reviewed features that were desirable as a team (Rev 1)
Make Aesthetic Model Aerodynamic	04 Mar 2019	DONE	Integrate aerodynamic shapes into aesthetic model (Rev 2)
Improved Aesthetic Model	09 Mar 2019	DONE	Aesthetic model with better performance than the pure Aero model (Rev 2E)
Mold Design Started	15 Mar 2019	IN PROGRESS	Figure out how to make molds

Design Journal

Date	Journal Entry	Notes
23 Sep 2018	Concept sketches complete, working towards converging to single final sketch	Documented at the Conceptual Design Page
30 Sep 2018	Final aesthetic locked down	Blended hood to windshield angle Large catamaran Cambered airfoil design for underbody Body comes down to cover rear wheels Documented at the Conceptual Design page
07 Oct 2018	Rough model in CAD	Rough geometry modeled in CAD Minimum array space, length, width, and height considered Wheelbase and track roughly defined Need to add space for front wheel sweep and suspension
14 Oct 2018	Revision 1	Added space for front wheel sweep and suspension Modelled the car "pontoons" to be similar to Sunswift Eve Beginning of parametric model
21 Oct 2018	Revision 2	First iteration of TopFoil, Pontoons design with simplified Pontoon design
11 Nov 2018	Revision 3 + Surface Model Rev 1	Oversized volume model with very large amounts of space for everything to go New surface model to show the goal of aesthetics for MS14
17 Nov 2018	Revision 4	Cut down to the bare minimum space required Still a volume model, unusable surfaces for simulating
23 Nov 2018	Revision 5	First revision of slightly clean surfaces and decent blend between Topfoil and Pontoons Trailing edge is now unified and continues from pontoons to Topfoil Two models A,B (variation of windshield inflection point)
19 Nov 2018	Revision 6	Narrowed down to a simpler geometry for the Topfoil and more features to show aesthetic lines Best performing model by end of Fall 2018
25 Jan 2019	Revision 7	First clean model to easily change Topfoil and pontoon geometries The model doesn't have enough controls to change everything, but has enough to change major shapes and iterate quickly Created with the intersect feature, which is very finicky to use
16 Feb 2019	Aesthetic Model Revision 1	First revision of aesthetic model with all main features included Simple enough to change parametrically Has all rough aero shapes necessary
01 Mar 2019	Revision 8	Most optimal topfoil shape determined through iterations in February and put as Rev. 8 Pontoons still need to be optimized
04 Mar 2019	Revision 8 +	Model with better pontoons Included inflection point at the back of the pontoons
09 Mar 2019	Aesthetic Model Revision 2(E)	Aesthetic model that performs better than all aero models Still needs to be improved to fit the suspension Needs more space for people Current drag force: 40N (25N Pressure, 15N Viscous)