sidemounting steel bottles

[grantmac]

Can you post a picture of the bolt snap and bungees you are using?
Also where the bolt snap is aligned with the tank valve?

 

[Scuba fryd]

Can you post a picture of the bolt snap and bungees you are using?
Also where the bolt snap is aligned with the tank valve?

i use a xdeep bolt snap and just some string besteen the camband and the carbiner mby halv a cm max string there.
the bolt snap is on the opesit side of the valve straight down (at 6)

 

[inquis]

the bolt snap is on the opesit side of the valve straight down (at 6)

Opposite the valve opening or valve handle? (Should be the latter.)

 

[Bowers]

I regularly dive with lp steel tanks and always have them on the waist. Butt plates allow tanks to move up when they get floaty and i don’t like that. I posted some videos early on to your post. I know you don’t know me from adam so my credibility is questionable, but as a cave and deco instructor who dives almost exclusively in sidemount, i think it would be worth your time to rig them as i described and dive them the same way you would aluminum tanks. Feel free to reach out to me if you want more details.

 

[grantctobin]

For those that haven't used them, 7L 300B are about as negative full as a PST LP104 of nitrox.

I'm guessing some combination of the following:
Bungees not thick enough for this application
Valves don't have a manifold post (or the bungee isn't being wrapped around it properly)
@Scuba fryd is narrow waisted
The boltsnap is in the incorrect orientation. If I am looking top down at the bottle that will be worn on my right and the orfice is pointing towards me and the valve knob is out right and the manifold post is left, the boltsnap will need to be moved clockwise probably some centimeters.

A butt plate and esp the XDeep one isn't going to help in this situation. If he finds a thicker bungee and has the appropriate valves, the square d location may continue to work. I think getting the rotational torque on these bottles using a waist d ring will be obnoxious to do in thick dry gloves and restricted mobility from huge undergarments.

 

[inquis]

I wonder if there's any rotational torque at all. This was stated above (emph. mine):

i use what i belive is a continues bungge. goes from behinde to the front dering permenetly then i just rest the valv on it

 

[tursiops]

I regularly dive with lp steel tanks and always have them on the waist. Butt plates allow tanks to move up when they get floaty

Your steel tanks get floaty?

 

[grantctobin]

I wonder if there's any rotational torque at all. This was stated above (emph. mine):

Yep that’d do it

 

[rjack321]

Your steel tanks get floaty?

Not floaty but as the gas in them is consumed the center of gravity shifts further and further towards the valve (like every other tank including al80s). So they end up near neutral or slightly negative - but standing upright with the tails up and valve down.

 

[Bowers]

For those that haven't used them, 7L 300B are about as negative full as a PST LP104 of nitrox.

I'm guessing some combination of the following:
Bungees not thick enough for this application
Valves don't have a manifold post (or the bungee isn't being wrapped around it properly)
@Scuba fryd is narrow waisted
The boltsnap is in the incorrect orientation. If I am looking top down at the bottle that will be worn on my right and the orfice is pointing towards me and the valve knob is out right and the manifold post is left, the boltsnap will need to be moved clockwise probably some centimeters.

A butt plate and esp the XDeep one isn't going to help in this situation. If he finds a thicker bungee and has the appropriate valves, the square d location may continue to work. I think getting the rotational torque on these bottles using a waist d ring will be obnoxious to do in thick dry gloves and restricted mobility from huge undergarments.

I agree with you up to the point of utility in thick gloves. I dive 490 undergarments with thick dry gloves in the Great Lakes and have no issue getting them in place and conducting a dive.