The serial hybrid is similar to the diesel electric in that there’s no physical connection between the internal combustion engine and propeller shaft. The prop is turned by an electric motor, always.

If you have 6 booms, and can fit 3 cells in each, do each boom as a single 3s with it's own PCB (even if it's, say, 30a discharge limit) you'll get 2 booms in serial, for 3 parallel, which gives ...

How about not connecting batteries parallel and if you do it, charge those full and then connect? Also I don’t see any balancing leads. Those need to be parallel too to make this thing safe.

The MAX3950 is designed to convert 10-Gbps serial data to 16-bit-wide, 622-Mbps parallel data. Its ability to handle FEC data rates make the MAX3950 ideal for a variety of applications in SDH ...