Why do Tech BC's have the butt dump on the inside, not the outside?

[300bar]

You need to pull the string AWAY from the valve to operate it. If the valve is facing TOWARDS the tank, AWAY from the valve is TOWARDS the tank.

I must be .....well that's up to you.

But when horizontal,dumpvalve on what ever side,you have to pull it to the right.(assuming the valve is on the right,if it's on the left you pull to the left)
How can the tank ever be in the way,your allway's pulling away from the tank.

Still don't get the picture.

 

[300bar]

(PS, a cannister light should be on the otherside anyway.)

Here ya go,not realy dir am I.

I would place it where ever it fits ME

 

[PfcAJ]

Think of a taco. The meat is the tank(s), the tortilla is the wing. Set your taco on the table. This is what a diver in a bp/w looks like in the water.

If a pull dump is on the meat side, you have to reach over the wing and pull toward the meat. Messy at best. If the pull dump is on the outside of the tortilla (away from the meat), you can reach right back and pull the dump valve out and up to dump gas. However, if you pull down, you're going to just pull the tortilla down. Ineffective for dumping gas.

 

[300bar]

Think of a taco. The meat is the tank(s), the tortilla is the wing. Set your taco on the table. This is what a diver in a bp/w looks like in the water.

If a pull dump is on the meat side, you have to reach over the wing and pull toward the meat. Messy at best. If the pull dump is on the outside of the tortilla (away from the meat), you can reach right back and pull the dump valve out and up to dump gas. However, if you pull down, you're going to just pull the tortilla down. Ineffective for dumping gas.

Thanks for the visual.But now I have a very messy diver in mind.

 

[300bar]

Please don't.

 

[BabyDuck]

DIR Mexico - Quality Cave Diving Instruction, Training, and Guiding in Mexico - Photo Gallery

300bar, go to that link and hit the pic bottom row third from right.

see how the valve is on the side closest to his hand?

now, if it were on the other side of the wing, imagine what you'd have to do to get to it and pull the string. not impossible, but a lot harder.

 

[300bar]

Your telling me something,but What.

btw great pics

 

[Jim Lapenta]

And even though you should not be anwhere near the ceiling or roof or other overhead feaure, having it on the inside minimizes the risk of it snagging on something. Same reason there's no little ball on the end. Just a knot or two.

 

[beanojones]

When you pull a front facing fabric butt dump, the inside fold of fabric is shorter than the outside so it is not the highest point.

I've been diving wings for years, and it never mattered, because the Travel Wing had the butt dump properly placed in back. And the Dual Bladder SuperWings can just be flipped so the dump is in the right place, facing away from the diver.

But now Dive Rite has moved the butt dump of the Travel Wing to the front, so it traps air.

Picture:



The blue length is the limiting length if you pull back away from the butt. If you pull on the rear facing dump it becomes clearly the highest point (which it was anyway). On the front facing dump, you have a whole bunch of bladder which can trap air since it is roughly three times the length of the limiting fabric.

This is not an idle question, because I have dove-ded front facing bladders and they trap air. Now that Dive Rite is following the other makers like sheep in putting the dump on the front,, there is no new Travel Wings that does not trap air.

So why do they put it on the front? Is everyone just doing what everyone else does? Just because?

 

[Doc Intrepid]

Nevermind......