. The old CCPs work on displacement so the need for plugs.
Quote from: "Capt. Bob". The old CCPs work on displacement so the need for plugs.?? How does that work?
Quote from: "Badonquasport196"Quote from: "Capt. Bob". The old CCPs work on displacement so the need for plugs.?? How does that work?The deck of the CCP's is above the waterline when the boat is at rest, in calm water.The drain (cockpit) resides in the rear corner of the deck (on each side) and the outfall is (under normal circumstances) just above the waterline on each side of the hull. As weight is added to the stern (think guys fishing) the hull outfall drop below the waterline and water enters the hose connecting the outfall and deck drain.Add enough weight (either several fishermen or a couple of fat ones) and the deck elevation becomes lower than the waterline and water enters the boat. This is most apparent when launching at a steep ramp where the stern sinks deep into the water. That's where the expansion plugs earn their money.As long as the deck is above the water line, water will travel through the hose and enter into the sea, even with the outfall submerged. Head pressure forces the water out the hose and follows the old (really old) adage, that "water seeks its own level".Choppy seas, where the boat is going up and down will allow water to enter and at the same time drain depending on the stern height. Again the expansion plugs work real well, in these conditions.Should you find a lot of water in the cockpit, say rain, just get underway and pull the plugs. Water collects at each drain and as mentioned above, is forced out via head (displacement) pressure.The infamous "coffin" is set up the same way.Funky, for sure but hey, that's half the fun of these old beauties.
