What's the Largest Size Wing You Would Ever Use?

[PfcAJ]

Ditching ballast is not the first choice for most deco divers....

Tobin

If your weight distribution sucks then yea, you're correct. A big floppy wing isn't the right answer though.

With helium in your tanks (tech diver) they're even less negative.

Thanks for helping to make my point

 

[cool_hardware52]

Look at the pic dude. It's too darn big.

Er, no, not really. Your pictures actually show *exactly* what the math dictates, i.e. a very slight ~.5-.6" of additional tank wrap.

Tobin

 

[PfcAJ]

Er, no, not really. Your pictures actually show *exactly* what the math dictates, i.e. a very slight ~.5-.6" of additional tank wrap.

Tobin

Which doesn't need to be there if you choose a proper wing.

No benefit at all.

 

[cool_hardware52]

Thanks for helping to make my point

LOL. So far your *Points* include the following jems:

Tank diameter determines required wing capacity

Drysuits can't lose buoyancy

And that 8" x P1/ 4 isn't ~.6" greater than 7.25" x Pi/ 4

Tobin

 

[cool_hardware52]

Which doesn't need to be there if you choose a proper wing.

No benefit at all.

Paging Princess, Princess and the Pea....

LOL, Are you seriously suggesting that .6" of additional tank wrap is going to make any difference? Really?

That's genuinely hilarious.

Tobin

 

[PfcAJ]

LOL. So far your *Points* include the following jems:

Tank diameter determines required wing capacity

Drysuits can't lose buoyancy

And that 8" x P1/ 4 isn't ~.6" greater than 7.25" x Pi/ 4

Tobin

8" tanks are generally more negative than 7" tanks.

Drysuit is irrelevant. You can't get more negative than not even being there. I know you're white-knuckling it with the drysuit, but just let it go. It doesn't matter.

Extra wing material is of no use, adds unneeded drag, makes dumping gas harder than it should be.

 

[cool_hardware52]

I'm in favor of limiting tank wrap, but using poorly conceived "rules of thumb" like 8" tanks need 60 lbs wings is not the way to achieve that goal.

Far, far more important is selecting a wing that has no more lift capacity than the application demands.

Weight of the back gas + Buoyancy of the drysuit with minimum gas +~2-3 lbs allows the diver to select a wing with enough lift. Smaller wings will wrap *all* cylinders less.

Tobin

 

[cool_hardware52]

8" tanks are generally more negative than 7" tanks.

Lets look at OMS LP 121 (aka faber lp 120's) and faber Medium pressure 120's

The *8"* OMS tanks are -~10 full and the 7.25" 3180 Medium Press 120's are more than 16 lbs negative when full.

That exactly why sweeping generalizations like you made below are a bad idea.

8" doubles get a 55-60lb wing

7" doubles get a 40-45lb wing

Singles get a 30lb wing.

Done and done.

Tobin

 

[PfcAJ]

Ok go fill some e8-130s, put em together with a baby wing on em and all the accoutrements, and dump them in the pool. See what happens.

Pls video.

 

[PfcAJ]

Lets look at OMS LP 121 (aka faber lp 120's) and faber Medium pressure 120's

The *8"* OMS tanks are -~10 full and the 7.25" 3180 Medium Press 120's are more than 16 lbs negative when full.

That exactly why sweeping generalizations like you made below are a bad idea.



Tobin

Generally

Have you ever even seen MP 120s? Like in real life? I sure haven't.