Pumps....
I don't know where your getting this information but... no... lol
Please be really carful which infomation you belive when reading online, if your boat fills with water and flipped over.. it's sunk... if water shorts the electrics, no pumps going to work.
Most RC engined boats will have a water cooling system attached to the engines header , this is easily confused as a '' water pump'' but its only cooling your engine.. it's doing nothing else...
To make a Boat self right , there are two methods...
One is a outright perfectly counter balanced hull, to which if its flips over, you can use the prop torque to flip it back over.... ( and this only works providing your engine did'nt stall out!)
The fool proof method is to have a chamber the entire length of the boat on one side fully glassed into the hull, which becomes a compartment to flood.
On the transom, a Hole is cut out where the flood compartment is to allow water to escape very quickly...
On the Top side some slots should be cut to allow water into the compartment...
The trick is when its flipped over, the Slots on the top ( becuase your now inverted) allow water to fill the compartment, this forced the boat to tilt over to the point of flipping the correct way over, once it's over the majority of the water can escape out of the back ( because it will flip to the water line so 80% of the water will empty, the last 20% or so will be forced out when u throttle up and the boats nose is lifted!
https://youtu.be/hHjFjHzLuWI <<--- how it works!
https://www.youtube.com/watch?v=AYj-nSHBnm4 <-- see em in action!
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