According to Mission Planner my quad only draws about 13A maximum. Each ESC can handle in the 50A range.
This is all just me wondering. I don’t plan on doing this because of the current weight limits I have.
What will happen if I have a motor above and below an arm and have both motors run from one ESC and still have the drone configured as a quad according to the firmware?
I am pretty sure that won’t work.
When the ESC drives a motor, only 2 of the 3 coils are energized. The magnet moving past the 3rd coil induces a current in the coil which creates back EMF and this is used by the ESC to synchronize. When you have two motors on the same ESC this back EMF would not always be at the same time and the ESC will de-synchronise. I guess if you are lucky it could work when there is no load on the motors but as soon as it gets loaded my guess is that they would stop or start shuttering.
It’s been possible for quite some time with a Flight Controller that supports it. With your Pixhawk, no. Just use PWM over 6 channels with that. You could use Oneshot125 also.
With my first crash I had too much power. 10% throttle made the drone shoot up.
What are the settings that would change if you have 6 or 8 motors to allow you to lift with 50% throttle or would you only fly such a powerful drone fully loaded?
You can use 8 motors with only 4 outputs by sharing one output between two ESCs - you still need 8 separate ESCs though. Just make sure the direction of rotation is the same for each corner pair, equipment used is the same all round, and ESCs are calibrated properly.
That will give you the lifting power and redundancy of an octo, but with the control stability of a quad (which is still pretty good as the video shows).
Using 8 motors with 4 ESCs would only work if the shafts of each motor pair were somehow clamped or welded together so that they could only rotate in unison, and even then only if the phase positions were matched up too. Not even worth trying imo.