If I plan to dive in trilaminate drysuit with thick undergarment, 20Ibs lead, SS backplate, Steel HP 100 single tank, how much wing lift do I need in the event of my drysuit is fully flooded? Thank you in advance
Question Help with wing lift
- Thread starter MoorishK
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ps444mike
Contributor
i did it with wing that has 35 lbs of lift.. 20 lead steel hp 120 i feel the water in the dry suit didnt really cause a prob ? till i got to the surface and had to fill my bc all the way up to float on the surface.. had a hell of a time getting back on the boat..
Oh no, your drysuit actually flooded completely?
landphil
Registered
Figure rounding everything up, these are your negative buoyancies:
HP100 tank 9 lb
Plate 6 lb
lead 20 lb
That gets you 35 lbs to float your rig at the surface, unless you're running a weight belt for part of the 20 lbs (but you probably want to include that so you don't need to ditch your weights.)
And any water you add to your drysuit doesn't matter for this calculation since the negative buoyancy of water in water as you would guess is 0. Also probably not worth figuring out your personal buoyancy here, unless you're super jacked and it's extremely negative in whatever water you're in. But for most people in salt water you'll be getting some extra help ascending
HP100 tank 9 lb
Plate 6 lb
lead 20 lb
That gets you 35 lbs to float your rig at the surface, unless you're running a weight belt for part of the 20 lbs (but you probably want to include that so you don't need to ditch your weights.)
And any water you add to your drysuit doesn't matter for this calculation since the negative buoyancy of water in water as you would guess is 0. Also probably not worth figuring out your personal buoyancy here, unless you're super jacked and it's extremely negative in whatever water you're in. But for most people in salt water you'll be getting some extra help ascending
landphil
Registered
You'd probably be fine with a 35- all of those weight numbers are plenty rounded up. Also, as you get your drysuit more dialed in, it's likely you'll drop a lb or 2 of lead. For emergencies like a full drysuit failure you'll also want to consider how much ditchable weight you're carrying. Even 5 lbs will get you plenty of cushion so you're not plummeting into the deep. Choosing between 35 and 40 will more come down to whether you're ever going to dive much thicker undergarments or if you think you're going to lift heavy things while you dive.
And for the least helpful piece of information to help you decide between a 35 and 40 wing- I dive with just about the same weight and tank as you and use a 37 lb wing
Caversluis
Registered
The buoyancy estimator will tell you
I'm intrigued now as to whether flooding the drysuit, and thus saturating the undergarment with water, may cause a (partial) loss of buoyancy that the undergarment provides, and how meaningful that might be?
30 for singles and 40 for doubles are the "standard" GUE recommendations for Fundamentals students, at least sampling the instructors I have interacted with.
In building a balanced rig, the hardest part for me has been to understand the undergarment buoyancy, as I've seen rather larger ranges mentioned, including by GUE instructors (e.g., 5 to 15 kg of lift).
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