Question about weighting with doubles in Florida

[rhwestfall]

looks like it should be fine.... even with HP100's

Manufacturer & Nominal Capacity

Service pressure, psi

Actual air capacity, ft3

Outer diameter, in

Length without valve, in

Empty weight, lbs (w/o valve)

Buoyancy Empty, lbs (w/valve)

Buoyancy Full, lbs (w/valve)

Luxfer 80	3000	77.4	7.25	26.06	31.38	4.4	-1.4
Luxfer S80	3000	78.2	8	22.93	35.12	2.26	-3.6
Catalina S80	3000	77.4	7.25	25.8	31.6	4	-1.8

Faber 100	3180 +10%	100	7.25	24.01	38.7	-7.26	-14.76
PST E7-100	3442 PSI	100	7.25	24.12	33	-1	-8.5
Worth X7-100	3442	100	7.25	24	33	-2.5	-10
PST 100	3500	102	7.25	23.94	34.1	-1.3	-8.8
Heiser 104	2400 +10%	104	8	27.36	47.4	-7.46	-15.26

seeing your wing needs to float your kit,

2 x -4 [twin 80's] + (-4) [plate] + (-8) [SWAG for manifold, regs, etc] = -20# .... add your lead and I think you are still below the 45# lift...

(I'd like to hear others thoughts on this)


however, that camera.....:shocked2:

 

[doctormike]

however, that camera.....:shocked2:

Hah! The camera has her own BC...

 

[syntaxerrorsix]

I need a SS plate + 7 pounds in the channel to dive my double 80's in a 5mil suit in saltwater, otherwise I'm a bit floaty at the end of the dive.

 

[LowVizWiz]

Yeah, I think that I figured it out... I guess a 45# would be OK, since I would only be using it with aluminum doubles and an aluminum plate in salt water. What do you think?

---------- Post added April 10th, 2014 at 10:35 AM ----------
Just ordered a #45... pretty good deal!

Since 99.999% of my diving is wetsuit diving in warm water a drysuit is not in my near future so I forked over the $90 for a dual bladder.
I'm diving twin steel 100s with an aluminum plate. Twin Al 80s are nice and light, but there's very little margin on reserves using those.
If I have to carry another bottle just for the extra gas it defeats the purpose of a pair of 80s IMO.

Using an RMV .7 for bottom and .6 for deco, a dive to 145' for 25 minutes = 97 cu. ft of back gas and 28 cu. ft of deco gas. Lost or missing deco gas = 144 cu. ft of back gas.

I prefer a little more breathing room, pun intended

 

[doctormike]

Since 99.999% of my diving is wetsuit diving in warm water a drysuit is not in my near future so I forked over the $90 for a dual bladder.
I'm diving twin steel 100s with an aluminum plate. Twin Al 80s are nice and light, but there's very little margin on reserves using those.
If I have to carry another bottle just for the extra gas it defeats the purpose of a pair of 80s IMO.

Using an RMV .7 for bottom and .6 for deco, a dive to 145' for 25 minutes = 97 cu. ft of back gas and 28 cu. ft of deco gas. Lost or missing deco gas = 144 cu. ft of back gas.

I prefer a little more breathing room, pun intended

Yup, that's what I was thinking... although I guess I could just plan shorter dives, I don't really want to be so limited. Probably better to have more gas, the dual bladder and the aluminum plate with the 100s if I decide to go wet.

Thanks!

 

[LowVizWiz]

Now if you know someone who wanted to to get rid of a Withes Fusion for a 6'5" 240# friend in Florida I would be glad to to give you my dual bladder and brave all those who would laugh at me for diving dry!

 

[rhwestfall]

Twin Al 80s are nice and light....

Compared to what?

Aluminum:

Luxfer 80 - 31.38#
Luxfer S80 - 35.12#
Catalina S80 - 31.6#

Steel:

Faber 100 - 38.7# (I'll give you that one)
Worth X7-100 - 33#
PST E7-100 - 33#
PST 100 - 34.1#

What am I missing?

 

[LowVizWiz]

Compared to what?

What am I missing?

Have you used a pair of AL80s?
A wetsuit diver can swim up a set of 80s with very little effort and no air on the wing, compared to any steel twin set. That = nice and light!

 

[rhwestfall]

"buoyant", not "light"..... (on land, they are quite similar)

 

[doctormike]

Now if you know someone who wanted to to get rid of a Withes Fusion for a 6'5" 240# friend in Florida I would be glad to to give you my dual bladder and brave all those who would laugh at me for diving dry!

You don't want a Fusion. You want this: http://www.scubaboard.com/forums/classifieds-exposure-suits/468370-santi-e-motion-xxl-drysuit.html

Should fit you perfectly, and I'm willing to negotiate...