----- 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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