Am I really weightless ?

[Breatholder]

Im looking for some formulas,numbers..and more importantly AVERAGES
for actual or AVERAGE body weight of a typical diver. Here are the numbers
im after.
Typical Male diver 165-175lbs
In salt water.
1. naked body weight
2. Full wetsuit 3mm body weight
3. Full wetsuit 5mm body weight
4. Full wetsuit 7mm body weight
5. Full wetsuit 3mm & Dive gear- 80AL 15lb lead
6. Full wetsuit 5mm & Dive gear- 80AL 20lb lead
7. Full wetsuit 7mm & Dive gear- 80AL 25lb lead

To avoid air expansion...lets say depth = 2 atmosphere

As stated above these are AVERAGES and I am aware there are alot
of variables. Discounting water salinity,BMI,Divers that hang everything
from their lucky rabbits foot to a microwave oven and more. Im after
AVERAGES.
And the last formula im after is LIFT...how many pounds of LIFT would
it take to bring a diver to the surface. for numbers 2 thru 7 ?
Im really interested in answers for items 1 thu 7 and of course LIFT
Not interested in answers that end up with tales of weather conditions
or the difference in weight from monday and thursday or the size of
fish in on the reef or aliens ...like cave and tech divers.
Keep in mind I failed calculus and currently get lost after counting
fingers and toes...so please keep formulas simple.

 

[oly5050user]

if depth is 1 atm as you stated he/she is on the surface...

 

[imwright1985]

it depends on %body fat, bone composition and a number of other things like how deep of a breath you take since if you drag a full breath of air you sometimes get a little lift and when exhling you drop a little.

im 230 and when wearing a 3mm a few weeks ago with full dive gear used 12lbs to attain neutral bouyancy. in summer in boardshorts and a rash guard was using 9 lbs at the end of summer. ohh and my tank was an al 80

 

[Breatholder]

Good thing you had the rash guard

 

[imwright1985]

Rash guards are awsome for florida, i have my regular clothes then like a wardrobe of rash guards and board shorts for summer diving and surfing

 

[Hoomi]

Okay, just a technicality here, but when diving, we are not weightless. We are buoyant, meaning that our weight is balanced by the surrounding water. Gravity still has the same pull on us as if we were standing on dry land in all the gear. If you weighed 225 on land in all your gear, you still weigh 225 in the water, but you're displacing 225 pounds of water to achieve neutral buoyancy.

As far as the math, I took algebra in ninth grade, between 35 and 40 years ago, and never pursued any higher math at all beyond that.

 

[markyd]

I think you mean you are not MASSLESS. If you put a scale under you, it would not measure anything if you are neutrally buoyant, so you ARE weightless.

Sorry, but can't help you with your numbers (apparently not a "Typical Male diver" at 205lbs). But with a 6.5mm semi-dry suit and full gear (Al80), I need about 34lbs, I think.

marky-d

 

[archer fish]

gravity works underwater, hold your weight belt in your hand and it becomes obvious. we feel weightless because the buoyant force lifting our body is equal to the weight of the water displaced. The following are variables which affect our buoyancy, air contained in the BCD and the ever changing volume of our lungs when breathing. stick to the practical method of determining the amount of weithts needed, with mask and snorkel, you should be able to float at eye level with the wt. belt on. when you exhale you should sink slowly. no formulas needed.

 

[Breatholder]

Interesting answers, I learned im not in the water but on the

surface,which is good because diving in florida i could get a

rash,and if i dare go in the water i still weigh the same, but

if i exhale and have the DM toss me more weight I will at

some point sink and amazingly gravity is still working under

water (good to know...no more sleepless nights),and the most

important thing i discovered was that i dont have to mail back

my 4 year degree and attend high school again !!! but seriously

i did some research and discovered ARCHIMEDES PRINCIPLE

interesting reading. Bottom line,despite the fact try as i might

i was unable to squish myself into cubic feet, the formula was

simple and direct and i now know it would take less than ONE

cubic foot of air to lift the average diver. on a side note i also

found a site on the bouyancy of the average 3mm wetsuit. It was

amazing to discover the bouyancy is less than 1lb. on average.

Thanks much for all the input from the SB folks.

 

[vladimir]

Interesting answers, I learned im not in the water but on the

surface,which is good because diving in florida i could get a

rash,and if i dare go in the water i still weigh the same, but

if i exhale and have the DM toss me more weight I will at

some point sink and amazingly gravity is still working under

water (good to know...no more sleepless nights),and the most

important thing i discovered was that i dont have to mail back

my 4 year degree and attend high school again !!! but seriously

i did some research and discovered ARCHIMEDES PRINCIPLE

interesting reading. Bottom line,despite the fact try as i might

i was unable to squish myself into cubic feet, the formula was

simple and direct and i now know it would take less than ONE

cubic foot of air to lift the average diver. on a side note i also

found a site on the bouyancy of the average 3mm wetsuit. It was

amazing to discover the bouyancy is less than 1lb. on average.

Thanks much for all the input from the SB folks.

Perhaps, but for the sake of your fellow alumni, maybe it would be better if you don't tell us who awarded it. Do you really live in Plam Harbor, as your profile indicates?