ITD,
The poster who was on the boat stated that there was a "catestrophic failure...of the hull," and in a roundabout way blamed the marina/Cobalt Boats. It is unlikely that they hit something, as that would have been mentioned. The bellows theory was a good one as well. That sounds like a good idea as well.
A 1 inch hole is a huge deal. I forget the formula, but a two inch hole a foot below the waterline will take on about 70 gallons of water per minute.
Edit, here we go. I know this isn't the neatest, but it does provide an interesting reference. Source oceanmarineservices.com.
Quote:
Flooding Rates of Various Size Holes At Differing Depths
Figures Are In Gallons Per Minute (GPM)
Hole
Diameter
6" 1' 1' 6" 2' 3' Below Waterline
1/8" .17 .30 .31 .35 .43
1/4" .88 1.20 1.53 1.80 2.20
3/8" 1.94 2.70 3.40 3.90 4.80
1/2" 3.46 4.90 6.00 6.90 18.50
3/4" 7.77 11.00 13.50 15.60 19.10
1" 13.96 19.60 24.20 27.80 34.0
2" 55.49 78.60 96.10 111.10 136.10
4" 222.10 314.30 378.70 444.50 544.40
6" 499.60 707.20 865.30 1000.20 1225.00
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