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Joe, Issue No. 2 - Understanding some of your design criteria, I
would go with the thinner steel for two reasons: 1.
Thinner hull equates to less money both for the steel and the
effort to form it. 2.
A greater margin of ballast leeway at the beginning of life for
a submersible allows more flexibility in the future to add ROVs, arms,
instrumentation, or bulkier passengers later in life. R/Jay Respectfully, Jay K. Jeffries Andros Is., Bahamas A skimmer afloat is but a submarine, so poorly built it will not
plunge. From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Joseph
Perkel .....Well Peter Madsen has infected me with diesel boat disease! :) To
the point of giving Alvin Jr. major cosmetic surgery. So may I introduce....
NR-2., http://www.frappr.com/?a=viewphoto&id=269116&pid=5807634
....a facsimile inspiration of the Navy's NR-1 sub but still using the
Kittredge platform... http://www.jasonproject.org/jason7/nr1/index.html
As before, input from the list is invaluable as Alvin Jr. was the result of
this valuable input. This is about the size of Freya, target weight within
handling limits of a fifth wheel utility trailer, to be slung in by a marina.
That box keel you see houses a single battery pod and two VBT's at each end
however, access, draft, and dropable ballast issues are apparent..(still to be
determined). It occurred to me while perusing my various ideas for my
great retirement project, that trailer boats get fairly infrequent use
anyway. For that matter, so do marina boats, (been there done that)! ...So
why not go for it! ... the maximum size and amenities that I could still
store between use. Maintaining and upgrading systems would be part of the fun
anyway. I can tell you now, that this will be a shallow water boat, not unlike both
Freya, and Kraka, for the same reasons. I will do the ABS calculations once I
have a solid concept to work with. This is fine with me, Andrea Doria depths
scare me anyway, so if I can't get there, I wont try! I have two major questions to be answered early on. #1 Diesel electric Which
way to go . An engine turning a prop...or a generator running everything
else?? Could I ask those Minn Kotas to do continuous duty for long
transits or not even though they are submerged? #2 1/4" or 5/16"?? Not
looking for depth capability here so much as corrosion allowance and extra
weight gain. NR-2 at this point, has 108 cu feet of submersible volume. More
weight in structure is less carried in lead but, what do I give up in terms of
workability with that added 1/16th?? ************************************************************************
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