How much weight are you using?

divingtactics

divingtactics

Serious Swagelok Addict
Interested to see how much weight JJ owners are using, so if you could be so kind to follow the format below:

Fresh or Salt Water: Salt
Total lead on JJ: 3.8kg in tubes
Dry or wetsuit: Dry
Trilam or Neoprene Drysuit: Trilam
Undergarment weight: 200 gram
Tank size and material: Twin 7 litre Faber Steels
Bailout tank size and material: 5.7 litre Luxfer Ally
 
I'll give it a go

Fresh or Salt Water: Salt
Total lead on JJ: 4'ish in tubes
Dry or wetsuit: Dry
Trilam or Neoprene Drysuit: Dui Cf200
garment weight: 4 elephants xerotherm x 2
Tank size and material: 3's
on a steel 2kg backplate
 
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Hey Jase, I know we've chatted, but I'll throw mine in anyway..
EDIT: height 164cm, weight 69kgs
Fresh or Salt Water: Salt
Total lead on JJ: 3kgs
Dry or wetsuit: Dry
Trilam or Neoprene Drysuit: URSUIT BDS kevlar Trilam
Undergarment weight: 100 gram or 200gram
Tank size and material: Twin AL40s Catalinas De-inverted
Bailout tank size and material: weight set with none. with Bailout I become much more negative, TRIMIX bailout makes me a little feet floaty so must adjust weights positions.

Fresh or Salt Water: Fresh
Total lead on JJ: 1.5kgs
Dry or wetsuit: Dry
Trilam or Neoprene Drysuit: URSUIT BDS kevlar Trilam
Undergarment weight: 100 gram
Tank size and material: Twin AL40s Catalinas De-inverted
Bailout tank size and material: two AL40s with 21/35

Hope that helps.
 
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178cm 98Kg

03 lycra Neo suit with Weezle Extreem and forth element base layer

4kg in the tubes and a 2kg SS back plate

Not dived in fresh water yet but on my KISS I had to loose 4kg switching to a light weight membrain suit and Arctic base layers for Mexico. Thats a significant drop in thermal protection / bulk.


Standard 3ltr Faber lightweight 235 bar tanks and my bailout isn't relevent to my weighting IE i can hold 6m in my rig without bailout.


ATB

Mark
 
Your format doesn't allow for backplate weight.

450 thinsulate undersuit. Membrane dry suit

Normal 3 litre set up

5mm backplate in fresh - no extra weight
2 kg on weigh belt for sea.

7 litre set up

Ali backplate in fresh water - no extra weight
3mm backplate sea (or 2 kg on weight belt)

No weight on unit. Like mark I make no allowance for bailout as weighting is done to achieve neutral buoyancy with no gas and no bailout.
 
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Clare; No weight on unit. Like mark I make no allowance for bailout as weighting is done to achieve neutral buoyancy with no gas and no bailout.[/QUOTE said:
Hi clare

Just a question based on a problem i once had

If your weight is spot on with no bailout, how do you manage the increasing buoyancy of the ally bailout Tin, if you have had to B/O, and are now using it

In my experience i found that the tin was pulling me up, and i was unable to send it up the line, as i was breathing from it

The tin was 11ltr with 2kg weight around waist

Cheers
Paul


Sent from my GT-N7000 using Tapatalk 2
Click to expand...
 
No Ali 80 should require a weight on it. They do move from negative to positive but only in the last 50 bar or so would they be positive enough to counteract their weight + valve + reg. if you have drained every bottle on your rig (onboard and off) to empty and have no buddy then it is a bad day mate. Still shouldn't be that far off neutral though.

With a large part of my deep diving done OC managing lots of empty bottles was normal. To be honest, when hip clipped on a leash, up to 6 empty 80s may hold themselves upright but they don't 'drag you up'. If a dive needed huge bailout capacity then I'd always have a buddy so could get rid of empties - and take full replacements. We are both happy carrying multiple leashes and empties cause no problems.

If a bunch of empty bottles is that bad or you have a protracted stop, by all means clip them to something else (line, buddy etc) or send them up (clipped around a line though!)
 
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Clare said:
No Ali 80 should require a weight on it. They do move from negative to positive but only in the last 50 bar or so would they be positive enough to counteract their weight + valve + reg. if you have drained every bottle on your rig (onboard and off) to empty and have no buddy then it is a bad day mate. Still shouldn't be that far off neutral though.

With a large part of my deep diving done OC managing lots of empty bottles was normal. To be honest, when hip clipped on a leash, up to 6 empty 80s may hold themselves upright but they don't 'drag you up'. If a dive needed huge bailout capacity then I'd always have a buddy so could get rid of empties - and take full replacements. We are both happy carrying multiple leashes and empties cause no problems.

If a bunch of empty bottles is that bad or you have a protracted stop, by all means clip them to something else (line, buddy etc) or send them up (clipped around a line though!)
Click to expand...


Thanks Claire

I think i'm missing something here

I have a 11 filled with TMX which weighs 17.5kg ready to dive. In the water this cyl floats ass end up. My other 11 is Nitrox and sinks, so to trim up, i put a small weight on the first cyl, to make them the same.

This TMX cyl is in no way neutral, it's positive

Ideally,when i'm at 6mtr, id have no air in the wing and a little in the suit for warmth etc, however, if i'd had to bail out, then managing the increasing buoyancy of the cyl would become a problem

So, i dive slightly (2kg) heavy

As for a buddy, well, as we all know, wreck diving in the UK isn't know for its vis, and loosing a buddy is a possibility, so i plan for this as well

I know Chasey uses steel 10's which behave differently to ally

I'm interested to know more about how you manage your ally's

thanks

Paul
 
If you choose to dive very slightly heavy then that is fine mate. But my point is it is not necessary to change weighting due to stages.

Take the full cylinder off and let it go - my betting is it would sink. It may float back end up but it won't be positive.

Empty they do hit slightly positive. But clipped front only they require extremely little downward force to keep them with you. You will only be breathing one at a time after all.

PC010146.jpg


Not the best shot but this is four empty 80s (well the one at the bottom probably has around 80 - 90 bar in it looking at how it is hanging).

This pile of gear was an OC cave dive I did seven or so years ago.

tinypicmeresselgear.jpg


Three of the 80s were pretty rich trimix and all came out empty or near enough. No extra weight needed for trim or buoyancy.

Forgive me, I see you are mod 3 but I don't know anything about your diving and I may be trying to teach you to suck eggs, but handling lots of empty stages really isn't an issue. If your bottom stage is a lean trimix and the rear floaty characteristic bothers you, place it at the bottom so that it lifts a heavy stage and wrap the clip at the bottom to pull it in tighter to your body. If you have to swim distances you can unwrap it and clip it to your crotch D ring if it is empty or nearly empty. Contrary to how it sounds, this places it exactly in line with your side profile if your stage is set up conventionally.
 
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Thanks for all the replies, following the discussion, I've added a couple of details to the format.

Fresh or Salt Water: Salt
Total lead on JJ: 3.8kg in tubes
Dry or wetsuit: Dry
Trilam or Neoprene Drysuit: Trilam
Undergarment weight: 200 gram
Tank size and material: Twin 7 litre Faber Steels
Bailout tank size and material: 5.7 litre Luxfer Ally
Backplate Material: Stainless Steel
Diver Height and Weight (optional): 173cm 76kg
 
JJ with 3 Liter steel tanks I used 6kg backplate and no more weight, decotanks alu 11L
JJ with 7 Liter steel tanks I use no weights and use this setup with aluminium backplate.
Drysuit Ursuit Cordura, water temp 2-8C, salty.
 
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Fresh or Salt Water: Salt
Total lead on JJ: 6kg (13lb)
Dry or wetsuit: Dry
Trilam or Neoprene Drysuit: Trilam
Undergarment weight: Halo 3D plus thin poly thermals
Tank size and material: 3L 230 bar Fabers
Bailout tank size and material: 5.7 litre ally (40cf)
Backplate Material: original stainless steel
Diver Height and Weight: 182cm 73kg

I also wear a 7mm hood and 3mm gloves
 
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Fresh or Salt Water: Salt
Total lead on JJ: 0
Dry or wetsuit: Dry
Trilam or Neoprene Drysuit: Neoprene
Tank size and material: 3L 200 bar Fabers
Bailout tank size and material: 7 litre carbondive
Backplate Material: original stainless steel
Diver Height and Weight: 180cm 78kg
 
Fresh or Salt Water: Salt
Total lead on JJ: none
Dry or wetsuit: Dry
Drysuit: Trilam
Undergarment: Weezle extreme
Tank size and material: 3 litre Faber/Heisler Steel
Bailout tank size and material: 5.7 litre Luxfer Ally

I added a 6mm SS back plate to add some weight in the centre of the unit and wear 8lbs of lead on a standard weight belt.

With thin undergarments, no lead.

Tropical will be an ally backplate, no lead, in a 5/7mm wetsuit.

176cm and 78kg (and counting!)

cheers

Ahdy
 
Fresh water
Total 5kg, 2 kg p-weight, 3 kg mounted on tanks (removable in water to facilitate hoist on boat)
Standard JJ steel plate
Standard 3L steel on-board tanks
Dry suit Trilam Bare X-Mission
Undergarnment: Weezle Extreme plus and Santi heating vest
Bail out tanks not considered for weighting
1.78m, 95kg

I think I can remove 1 kg, but will only try after I finished my ongoing normox. TMX-class
Best,
Martin
 
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