The most important thing in designing the ROV hardware was modularization for each part to make assembly and production easier. S-ROV consists of six parts, and each part can be made independently.
I'm still in the progress of designing and will continue to update the progress in this article. :)
Part 1 : Body Frame
The base frame. The acrylic tube with the main controller is raised over it. And also plates with motors and led light cube are attached on both sides. In addition, there is some part at the bottom to attach weight to match the center of gravity and buoyancy.
Par 2 : Side Plate
Two BLDC motors and led light cube are attached.
Part 3 : Main Tube
ROV controller, raspberry pi, and camera are inserted.
Part 4 : PCB Chassis
It can mount PCB, raspberry pi and so on..
Part 5 : Vertical Propeller Guard
It is the guard which protects the vertical direction propellers.
Part 6 : Horizontal Propeller Guard
It is the guard which protects the horizontal direction propellers.
The 3d cad files are available at Onshape.