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Hi, Maybe good to list the Percentage.
For the Maybe I reduce this to 5%
for, as Frank mentioned, stability reason. We don’t like to
pop up inverted ;-0 What does ABS say about
this subject? We use steel bars or
plates; Cheaper than lead an harmless for the environment. Regards, Emile Van: owner- Hi Alan. I've heard of as little as My calculated lead ballast should be
around #1...keeping the weight as low as
possible obviously, to keep the center of buoyancy well above the center of
gravity. Too big a drop weight and the boat may become unstable after dropping.
I've designed a grid system on the floor of the sub which will have
"pockets" for lead bricks. ( bolted down ) The drop weight will be
poured into a steel container attached to the bottom of the sub. Model testing
has shown acceptable stability after the drop weight is released. #2.... if the weight is dropped,
you need to have a spare to go and retrieve the old one. The cheapest I've
found for lead on Ebay is 76 cents per pound. I got lucky and found a local guy
who will sell me I went with a large drop
weight because I may get hung up on something and wanted to have a lot of
buoyancy to break free if the need arises. I plan on spending a lot of time in
the kelp beds and they are pretty strong if you get tangled up in them.
I've tried to minimize points that can "snag" on the sub, but it's
still possible to get hooked on something. Frank D. No virus found in this incoming message. |