RE: 23 pound twin
Hi, Great choice of twins a PBY, one of my favorite all time aircraft. No you need a separate ESC for each motor but you can run both motors and ESCs off of one humungous battery. You can also feed both ESC receiver leads into a Y cord but you can only have one (red positive ) power wire attached otherwise you will be feeding too much voltage into receiver. You need both receiver leads into one attached to engine signal pins but cut one of the red leads. Norm
on smaller brushed motors you can use one larger ESC/BEC for both motors but only BRUSHED.