I like metal casting as a fun thing to do, I'm not
the best at it, but it seemed like a possible solution.
I think what I might do if casting is that
unreliable is to reinforce but shave the inside diameter down 2mm. I might have
to figure out how to take the onboard batteries off and shove those topside (I
have powersources both on the ROV and at the control station) That'll probably
do the trick.
----- Original Message -----
Sent: Tuesday, September 05, 2006 4:00
PM
Subject: Re: [PSUBS-MAILIST] Quick
Casting question
How about structural foam rings bonded between your outer hull
and a thin inner hull? Borrow a little from experimental aircraft ideas
to keep the weight down. Way easier to build unless maybe you're really
into metal casting. More predictable results, structurally.
On 9/5/06, George
Slaterpryce <gslaterp@hotmail.com> wrote:
It's an "Micro"-ROV correct, I'm trying not to
increase any of the dimemsions of preasure can, because that will require a
whole mess of remaking new parts to fit.
-----
Original Message -----
Sent:
Tuesday, September 05, 2006 3:38 PM
Subject:
RE: [PSUBS-MAILIST] Quick Casting question
If
you are going to build a new hull anyhow, could you instead increase the
diameter of the sub to displace 5 extra kilos of water and still use
conventional methods of construction? You would also need to displace the
weight of the extra materials needed to create the larger hull or you will
still be sinking.
I would
be leery of using home-cast aluminum on a sub as it tends to be brittle and
full of porosity (hollows).
Todd
Fee
What
diameter is the sub now? It's an ROV, correct?
Say I have an aluminum tube/pipe that has a 5mm
wall. on the iside wall (the inside of the hull) the pattern attached to
this email is on it. with the raised areas (the black bar) "replacing" the
need for bracing straps. think of the white spaces as being 3mm "deep" so
that the majority of the hull would be 2mm thick, but the waffle pattern
behind it would make it 5mm thick in places providing "bracing" built right
into the hull. Thus saving me time/money and weight... I really need to trim
~5kilos of my latest bugeye design somewhere. I cut it way too close for
BugEye II and it was slightly negatively bouyant.
----- Original Message -----
Sent:
Tuesday, September 05, 2006 2:52 PM
Subject:
RE: [PSUBS-MAILIST] Quick Casting question
George,
D'you have a drawing of
what you're proposing? I don't follow...
thanks,
Alec
Does anyone know if I do a waffle pattern
on my Preasure Can's inner hull if that can substitute for welded in
place braces? (Aluminum casting, inner pattern is a wide waffle
pattern)
Or should I just stick with a straight pipe
and weld the braces/ribs in it like normal?
Fiigured I'd ask before I tried this,
Considering the lack of space I have it's a production to do anything
with casting. but if it'll work I'tll probably be worth it.
Thanks.
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