Spent a bit of time today diving into the power distribution wiring. Decided to use the Gryphon Dynamics power distribution board (PDB). You can get these with or without female bullet connectors already soldered. We chose the one without as I figured we’d just be soldering the power leads right to the board. In the end I decided to use bullets as it makes assembling/disassembling the rig much easier.
You may have noticed that I’m using 10awg wire for the power leads to the ESCs and even though they fit, they are totally overkill and I may even swap them out for 12awg at some point. The reason I chose 10awg was due to this being a heavy lifter and the short ESC leads were already 12awg – I figured it couldn’t hurt to have a more “open pipe” for the power line extensions.
Super impressed with the Castle Creations bullet connectors by the way. On this build I’m using the 5.5mm for the power leads and 4mm on the motor wires.
I’ve been asked if I plan to use the Gryphon Dynamics Core PCB. On this, I decided not to go with proprietary type connectors and instead go with standard bullets and servo type connectors as they’re easier to come by in the event of a repair.
One concern I had the other day is that perhaps this PDB is under spec’d for this build as it is rated for 260A continuous and 320A peak. True that we won’t be pulling close to those numbers under normal flying but 8 Tmotor U7s with 18″ props at 100% throttle can peak out at about 500 Amps! After a bit of research I’ve come to find that the Gryphon PDB is a dual layer PCB while the Aeronavics is only single and boasts 230A continuous. I suppose in theory the Gryphon board should be able to handle double that of the Aeronavics; still, I plan to do plenty of testing before flying any precious cargo!