I designed this as a cheap RC boat to rescue my nice speedboat in the event it goes dead in the water.
I used a large RC truck servo to rotate the main propeller to steer and have an A2212 brushless motor as the main motor. The chasis is made of PVC pipe, the dimensions are not important but the bar across the back is needed to actually rescue boats.
I put the battery ESC and radio in a tubarware bin elevated over the main U shape.
There are files for pontoons I desinged but they were too large for my machine so I packing tapped some water bottles to the PCV pipe and it worked just fine.
The author marked this model as their own original creation.