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🫂 Attendance

🗒️ The Weekly Recap

✈️ Flight Tests:

• Autotune works. well.

📦 New arrivals

✅ Open action items

Conall Kingshott Composites stuff never properly setup, not a problem that we had not given to him, Graeme figuring everything out and then letting us know. Composite manufacturing in the next two weeks.

#electrical: Crimps, connectors, housings, signal analyzers, etc.

📝 Meeting minutes

Frame Updates 🚁

Composites in the next two weeks, before midsun gets it in (midsuns stuff is massive and takes a while)

• Try and get as many people in the room as possible.

Frame updates

• Starting on landing gear prints

• MCMaster Carr order for standoff stuff & miscellaneous items.

• Talking to Les (machinist). Will likely have to do a lot of this ourselves and then send it off to him to finish (battlebots causing issues).

Sensor Updates 📏

• RTK GPS? Has antenna and control box.

  • One M9N, one RTK.

  • Mechanically identical, mounting pattern is the same.

  • will remain on posts (similar to vanny, except further).

RF updates 🌐

• Need notch filters? 5W video very much stepping on other freqs? not sure…. currently investigating

• Could get SDRPlays. (RSP1A → to be acquired)

Motor 3-phase connectors ✅

• 3-phase connectors decided:

  MT-30 for inner-hub-to-tube connector

  https://www.tme.com/ca/en/details/mt30-m/dc-power-connectors/amass/

• 3.5mm Bullet for end of tube - motor connector.

  • https://www.amazon.ca/Pairs-3-5mm-Female-Bullet-Connector/dp/B089DZ66J1/ref=sr_1_1?keywords=3+5mm+bullet+connectors&qid=1689020675&s=electronics&sprefix=3.5mm+bull%2Celectronics%2C94&sr=1-1

Found plenty of bullet connectors in the bay

• Seems like we have enough, is there a reason why we can’t use the ones in a connector box on the EE shelf?

• EE still needs to source Motor/ESC wire

  • Should be a small task

Battery PDB Distribution

• How are batteries going to be arranged in series/parallel?

  • Scuffed diagram that needs explanation of potential implementation for three 12S batteries

  • 

• How will our board support this layout?

• Thoughts:

  • 2 PM02D’s (2 banks of batteries), parallel after. Potentially on either side of the battery.

  • Junction point closer to the edge of the board (away from the pixhawk).

• Do we have two PM02Ds in the bay?

  • If so, electrical member needs to test the current sharing capability of the power modules to see if we can get even current draw from each power module

  • Potentially borrow E-Load from Midnight sun

Airside Electrical Layout

• Where each component goes needs to be added to the architecture document.

Need selection of proper wire gauges, types, etc.

https://www.engineeringtoolbox.com/wire-gauges-d_419.html

• For Battery connections, 8 AWG can be used to handle 75A continuous (maybe a little lower if stranded)

  • Stranded likely needed in order to have the required flexibility

  • Two power modules in parallel, two banks of batteries in parallel.

• For motor connections, each motor draws around 15A (determined when discussing MT-30s)

  • 14 AWG wire (24A) should be enough for ESC connections to PDB

• Wire gauge for sensors

• CrimpersElectrical Wiring diagram experiencing slow progress (unfortunately)

  • Some of the modules are in the diagram but things need to start getting connected

  • Power distribution wiring about halfway done

• Do we have all the JST-GH connectors (housings) that we need to connect to pixhawk

  • Took a quick look in the connectors box and only found connectors for 5 pin

  • Do we need to order more from the other kinds?