James,
Sorry for a late reply. If you haven't already located your pods, maybe
this will be of some use.
I remember have the same question when building my sub. The location
isn't
clearly indicated. If I remember correctly, I located my battery pods by
scaling off the drawings. I know it's now a safe thing to do, but I did
some calculations and it looked about right.
Now that I'm using my sub, I can tell you that I have about four hundred
pounds of ballast in the aft section of the hull and about a hundred up
forward. When I take a passenger and they lay on the deck looking
forward,
I remove my forward weights but it usually isn't enough to get level.
Depending on the passenger weight, I could have a 5 to 7 degree forward
down
angle. Five degrees isn't that noticeable, and when scanning the bottom,
it actually helps so no big deal.
If I were to do it again, I think I would move the battery pods aft a few
inches, as long as it didn't interfere with the hull frames and you have
clearance for welding. That way maybe I could have a bit more forward
movable ballast.
Hope this helps,
Dan H.
----- Original Message -----
From: "James Frankland" <james@guernseysubmarine.com>
To: <personal_submersibles@psubs.org>
Sent: Tuesday, May 26, 2009 7:14 AM
Subject: [PSUBS-MAILIST] Pod Vent Allignment
Hi All.
Finally i am assembling my battery pods. Can someone help me with a
problem.
The plans show the position of the vents on the pods themselves, but i
cant
see where they go on the hull, lengthways down the hull. Not exactly
anyway.
Looks like the front vent ends up between hull frames 1 and 2. but where
exactly? Smack in the middle? That would be 7 inches from the front of
the
uncapped hull tube.
Or, does it line up so the uncapped pod lines up with the uncapped hull?
Also, i am only putting in 1 vent at the front. The other is replaced
with
the electrical through hulls (Alec's design). I have modified the spacing
of the through hulls so they fall exactly between frames. easier to weld
if
they are not to close to the frames.
Do you understand what i mean? Picture is here of them just placed into
position. The front vent is in the correct place as per the plans and the
spacing would allow the vent to to in the middle of frames 1 and 2, the
others fall in between the other frames.
http://www.guernseysubmarine.com/index_files/Page20926.htm
The questions are:
1 Where exactly do the pods go in relation to the hull.
2 Am i ok to change the spacing of the vent\through hulls to allow them
to
fall conveniently between frames?
Thanks
James
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