Congrats, it arrived! Looks nice!
Is there a temperature sensor inside the motor? The Vesc has a motor temp input to protect it from overheating. I think it has no water cooling inside.
I would take these steps:
- Take measurements with the vesc to document the resistance, no load current and Kv. Swap motor phases several times to be confident.
- Mount a temp sensor to the winding, get some hints how to take it apart maybe from other users or the manufacturer. Ask also what the temp limit of the magnets is. Program the vesc to limit motor current between around the magnets temp.
- Mount a prop, test it unsubmerged and uncooled, get some real time data from temp sensor at different phase current settings.
- Unmount the prop, heat up the motor to e.g. 60°C in an oven statically, so all components inside have the same temp. Submerge it and let it run with no load current for some minutes with temp data readings.
What can you do with this data?
From the phase resistance and the current you calculate the ohmic losses and add the no load current to get the powerloss which is produced inside the motor. Together with the temp sensor reading you get a heat up curve and can estimate the thermal capacity. From the 4. measurement you can estimate the thermal resistance from winding to outer surface.
Try to set up a simplified thermal model with capacitors, resistors, voltages(equals temp), current sources (equals powerloss) using Matlab or simply Excel by feeding it with real time data and the simplified thermal model and a fit algorithm to find the parameters.
With this thermal model try to simulate some scenarios with startup processes and foiling phases and pauses.
If its overloaded by permanent foiling, forget it,
if it is overloaded by frequent startups, use the temp sensor,
If it is never overloaded go flying.
About the cables. I think the vesc6 has AWG11 wires which is on the boarder. Maybe you can resolder with bigger ones, but that costs your warranty or keep them short with a massive plug or solder interface. The motor wires you cannot change, its too risky.