2023-10-18 Mechanical Meeting

Intro

@Conall Kingshott

• We’re a bit slow now because of reading week and midterms coming up, and that’s alright! Hopefully meeting is reasonably quick.

Flight tests

@Conall Kingshott

We attempted a hover test this weekend. We flipped the drone, but the problem has been diagnosed. Not damage on the mechanical front.

More info can be found here:
2023-10-14: Pegasus Hover, ZP3.5 M1, & Pilot Trainning

There will be a flight test this weekend, trying hover again. More info is here:
https://uwarg-docs.atlassian.net/l/cp/xguRBjuH

Shared Spaces Meeting

@Conall Kingshott

https://uwarg-docs.atlassian.net/l/cp/RqH5y2Xu

Electronics Cases

@Nathan Green

• LTE Case

• VTX / Antenna Case

Frame

@Conall Kingshott

No major updates

Antenna Tracker

@Arjun Mandair

This is going on a bit of a break for the moment because Arjun is busy and we don’t have other people to support it atm. If anyone has a concern with that, please contact me directly.

Cabin

@Alison Thompson

• Cabin design still underway!

• @Evan Janakievski has been working hard on the Skeleton !

  • Dimensions are more fleshed out now but something weird is happening with Evan’s PDM

• @Georgia Vachon Westerlund Updates to CAD and some CFD simulation results: https://uwarg-docs.atlassian.net/l/cp/qrpZo69M

  • Following the feedback from last week’s meeting, I made the front/rear panels 2 mm thick and the side panels 4 mm thick

  • Added a 50 mm (length tentative) to the top and bottom of the front/rear panels. This segment will be bent up into the cabin when it is assembled

  • Chose a bend angle of 20 degrees, this angle is tentative pending simulation results.

  • The part files in PDM have been updated in accordance with the design changes shown below:

Open

Sketches of design changes

• @Georgia Vachon Westerlund Ran a couple of preliminary aero CFD simulations

  • Took me a while to download and learn the software

  • Created a “control block” with similar dimensions to the cabin to be used as a basis for CFD analysis (CAD available in PDM as well):

  • Open

    

    Dimension Model used for CFD

  • Used Ansys fluent to setup meshing, boundary conditions, simulation domain, etc.

  • Results are as follows:

    • Drag coefficient of ~8.61

    • Lift coefficient of 0.00395 (negligible)

  • For future simulations, would like to determine the effect of the 20 degree bend angle on the lift/drag coefficients

  • New model has already been made, just need to run that simulation later this week and compare results to the control block:

  • Would like to evaluate the relationship between the bend angle and the lift/drag coefficients

  • Would like to evaluate how effective s-ducts would be (a bit more advanced, I’ll need to get more familiar with Ansys Fluent first).

• @Sohee Yoon has taken on the Aero-Panel mounting and it’s looking great! Want to explain your ideas? Aero-Panel Mounting ?

• @Jason Li want to share your seat updates? I see some nice sketches in Seats !

• @Wallace Lee are you still interested in doing Cargo Compartment ?