LG Diver
Guest
Lately I've been diving a single LP95 with my heavy FredT backplate/STA (14 lbs), DUI CF200 and 14 lbs on the weight belt. The weighting is nearly perfect (at 12 pounds I was a little floaty at the end of the dive). I'm planning to switch to double Faber HP-100's and I'm trying to figure out a) how much lead I need to wear and b) what size wing I'd need. I put together the following calculations (see attachment). I think that what this tells me about my current setup is:
1) my exposure protection is providing 35 lbs of buoyancy
2) I need a wing with 28 lbs of lift to float the rig with full tanks without me in it
3) I need a wing with 42 lbs of lift to float me and the rig with full tanks in the event of a total DS flood.
So it seems that my 45# Oxy SS wing is well sized. Comments so far?
Now, I wanted to take these "known" facts and try to extrapolate weighting and wing lift for a different setup. I'm planning to switch to double Faber FX-100's, Al bp, and 5 lb tailweight (seems that a good number of people are running a tail weight with these tanks to trim them out). If I keep the DS buoyancy constant (total buoyancy with empty tanks) I can "solve" for the required weight on the belt and get 15 lbs of lead. I think that what these calcs tell me about my proposed setup is:
1) my exposure protection is providing the same 35 lbs of buoyancy
2) I need a wing with 36 lbs of lift to float the rig with full tanks without me in it
3) I need a wing with 51 lbs of lift to float me and the rig with full tanks in the event of a total DS flood.
Do these seem like logical estimates for this setup? I have already picked up an Oxycheq Vertex 42 wing but haven't used it yet. I'm wondering if I should return it and get the Vertex 55. The 42# wing would be ample in any circumstance except a complete DS flood. Your thoughts?
Thanks,
John
1) my exposure protection is providing 35 lbs of buoyancy
2) I need a wing with 28 lbs of lift to float the rig with full tanks without me in it
3) I need a wing with 42 lbs of lift to float me and the rig with full tanks in the event of a total DS flood.
So it seems that my 45# Oxy SS wing is well sized. Comments so far?
Now, I wanted to take these "known" facts and try to extrapolate weighting and wing lift for a different setup. I'm planning to switch to double Faber FX-100's, Al bp, and 5 lb tailweight (seems that a good number of people are running a tail weight with these tanks to trim them out). If I keep the DS buoyancy constant (total buoyancy with empty tanks) I can "solve" for the required weight on the belt and get 15 lbs of lead. I think that what these calcs tell me about my proposed setup is:
1) my exposure protection is providing the same 35 lbs of buoyancy
2) I need a wing with 36 lbs of lift to float the rig with full tanks without me in it
3) I need a wing with 51 lbs of lift to float me and the rig with full tanks in the event of a total DS flood.
Do these seem like logical estimates for this setup? I have already picked up an Oxycheq Vertex 42 wing but haven't used it yet. I'm wondering if I should return it and get the Vertex 55. The 42# wing would be ample in any circumstance except a complete DS flood. Your thoughts?
Thanks,
John
