get the air out

[productbob]

Hi after 10+ years of diving with a jacket BC I switched to BP/W. Having trouble venting air from the wing unless I'm almost vertical (using a oxycheq single with STA and ss plate). There doesn't seem to be any restricitions on the air moving around the bladder. Any suggestions? thnks

 

[Blackwood]

What type of wing? Is it a horseshoe? Sometimes the air will hang around in the bottom right hand side of the wing and you'll have to wobble around to get it over near the dump.

Try the rear/pull dump when you aren't vertical in the water.

 

[jhelmuth]

You are correct.... there are no restricions on many of the single tank/cylinder rec-style wings - this is by design (doughnut) and has a positive purpose (avoids gas trapping within the wing and allows the gas to find the proper displacement/location based on the divers attitude in the water).

This means you need to adopt a proper "dump" technique. It's not hard at all...

Find the "highest" point on the wing from the center of gravity (the earth) and use that dump valvle to allow gas to escape from the wing.

Some divers develop additional technique when there is no definative "high point". This usually is executed in a horizontal position and involves moving the rear dump to the highest point by slightly rolling to the dump side (should be the right hand side) and lifting ones arse into the "high point" position. With a small amount of practice, this will become second nature and very easy to execute.


Best wishes....


Jim

 

[Michael Kazma]

Which wing are you using on the single tank. Does the wing wrap around the tank much? If it does the air may be wrapping the wing around the tank and getting stuck in the high spots and not moving around the wing.

 

[Blackwood]

Some divers develop additional technique when there is no definative "high point". This usually is executed in a horizontal position and involves moving the rear dump to the highest point by slightly rolling to the dump side (should be the right hand side) and lifting ones arse into the "high point" position.

Don't most wings have the rear dump on the left?

 

[tbone1004]

Ok.
Since you said Oxycheq, I'll assume it's a donut since they're current ones are.
Doesn't matter if it's 18, 30, or 40.
Dump valve is bottom left. Get so where you are slightly head down, and pull dump valve. If you are drying to use the inflator to vent, which is fine on descent or ascent, you're not going to get anywhere. Roll slightly head down, and slightly to your right to get your left hip high.

My old travel wing does have it's dump on the right side, throws me off every time I dive it since I'm used to Halcyon's and my Nomad which are on the left

 

[jhelmuth]

Don't most wings have the rear dump on the left?

Yes... my bad.

 

[productbob]

Thanks for the suggestions. I'll try them out tonight.

 

[john844]

I have the same wing, and to get the last little bit of air out of the wing, I have to go through the same dance. I have noticed I can get a little more air out by fully extending the deflator hose up where there is not a loop below the air bubble. I think this is where the air is getting trapped for me. Since I have my inflator hose bungied to my harness, this is a pain. I have to pull the bungie back down after venting to prevent the dangly hose. Rear dump works well, and is what I use for the last bit of air most of the time. When diving dry, I have to remember to bend at the waist to elevate the back of the bladder.

 

[productbob]

saxplayer1004, tried the roll to the right and it worked well, thanks!