eth727
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I've got a 30cf AL pony setup that weighs almost 20 lbs. I wear 20lbs of weight. Can I shed all the weight since the pony weighs 20lbs?
30CF pony replace weights
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Quick answer, NO.
The tank may be 20 lbs on the surface, but it is only 1lb. under water.
Jim Breslin
The tank may be 20 lbs on the surface, but it is only 1lb. under water.
Jim Breslin
No. You will find that your tank is only about 1#-2# negative when full, and neutral when empty. Tank comparison chart. Remember that the buoyancy is related to the amount of water the mass of the tank displaces versus the mass of your weights. Best case you can take a couple pounds from the opposite side of where you mount your pony for balance.
Dashrynn
Contributor
oh wow....and even then don't remove the weight for the pony, keep your original weight or add 1 lb jus incase you need to empty your tank or something goes freakishly wrong. Most 30's are positive 1 lb when emptied, some are still slightly negative. I'm not sure about when you put a regulator and spg on it. It may be negative then and you don't need to add weight.
burna
Contributor
Dr Wu
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No you can't remove the weight for all the reasons above.
One thing to point out, all the estimates above on the addtional weight added are off by several pounds. While the additional negative buoyancy of the tank ITSELF is 1 or 2 lbs you also have to take the regulator into account, that is an additional 2 to 4 lbs , increasing the total additional negative buoyancy to more like 4 to 6 lbs, all of which need to be offset by air in your BC, not by dropping weight off your belt.
One thing to point out, all the estimates above on the addtional weight added are off by several pounds. While the additional negative buoyancy of the tank ITSELF is 1 or 2 lbs you also have to take the regulator into account, that is an additional 2 to 4 lbs , increasing the total additional negative buoyancy to more like 4 to 6 lbs, all of which need to be offset by air in your BC, not by dropping weight off your belt.
Well, actually he does. The tank + valve + reg weighs about 20 pounds, just like his lead weights weigh 4 or 5 or 6 pounds on land.
Whether a diver with his experience should be carrying a pony is debatable, but I don't see anything dangerous in the advise. In fact, perhaps my advice to possibly remove weight was wrong if he has to donate the pony to another diver.
As far as your other advice, did you check his profile? He has had training. Perhaps he doesn't understand bouyancy but isn't that the point of asking a question?
Scared Silly
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