<br />speaking of old shows/ ping-pong balls...<br />captn' Kangaroo!<br /><br />back 2 yur ?... I think Bondo's idea is better.<br />pop bottles are not nearly as fragile os PPballs
Nope,........ uh-Huh......... No Way.........<br /><br />Foam is Added Weight,+ Expense,+ Unnessessary........<br /><br />Glue the Caps....????? Are You Kidding ?? A Soda Pop Bottle will hold Pressure for Years......<br /><br />How Old was the Oldest Soda you've ever Opened ???<br />I've Found them 5, maybe 10 Years Old,...... And they Still go Fisszzz When I opened it...........<br /><br />A Soda Pop Bottle will Last Forever, as long as it doesn't see the Light of Day(No UV Light)........ And there's darn Little Sunlight in My Bilges.........<br /><br />If you were to Screw the caps on during a nice Winter day, at say 30*.... Those bottles would be Pressurized All Summer Long,.. Just from the Temp. difference........<br />No Pumping.. No Foam.... Just Nice Stable Air......<br /><br />AAnnndddd,...................<br />If by chance You Do take on a little Water,<br />The Bilge Will Drain Perfectly, All By Itself......As long as you add the required Limber Holes........................
Correct. <br /><br />You'd need cube shaped ones packed so there weren't any voids to get close to 100% air volume, less the wall thicknesses. <br /><br />Same problem with soda bottles as cylinders leave lots of void between them.<br /><br />Why not use air bags? Not the sort in cars, but made of heavy gauge durable rubber in suitable sizes to more or less fit the shapes under the floor. <br /><br />I'm thinking of the heavyweight tough stuff like they use for fluid containers for water and fuels. And inflatable boats. Virtually impossible to hole it just sitting under the floor. Stuff like this, except inside the boat http://www.airofloat.com/ <br /><br />Lay it over a thin plastic mesh so water can always drain to the keel and not get trapped between the bag and the hull or the strigers.<br /><br />Put a filler valve through a sealed hole in the floor so you can keep low pressure air in it to make sure you have it fully filled.<br /><br />A bag between each set of stringers ensures that even if one is holed you'll still have the others. <br /><br />Could also adapt the same idea to the bow and the voids under the gunnels and splashwell that are out of sight.<br /><br />I suspect that this would give a greater volume of air than whatever is trapped between the cell walls in foams.
They just did a show on that on Mythbusters. They took a sailboat and sunk it. Then used a long 6" hose with a funnel on the top to pour the balls down while pumping water into the top. The coralis effect (like your toilet) pulled the balls down about 35' into the cabin of the boat and it floated to the surface after using 27,000 balls. The sailboat weighed 3500 lbs and they originally calculated that it would take 50000 balls to float but forgot about the boyancy of the wood and other items.
<br /><br />2 part foam is cheap why take chances i gotta beleive that the same volume of foam has more bouyancy than a soda bottle filled with air
