Whats is the weight and bouyancy of an old steel 72?

[TheRedHead]

Al 80s were essentially never on the table for me, diving in cold water. I already carry enough weight to sink a battleship! The question was the old 72s, of which I have a pair, or buying a pair of tanks (either new 72s or something larger) specifically to double up. I don't want anything that goes positive at the end of the dive, because packing on weight to cancel that out in addition to the weight of the doubled tanks in the first place might be enough to break the camel's back.

I just got my Faber FX-72s and they feel very managable on land. I have no problem lifting them to chest level empty. I dived a set of E7-100s last week and it wasn't as bad as I imagined. My knees buckled on the last step up the boat ladder, but I think I would be able to overcome that with more practice.

You definitely don't want to pack any additional weight. I used 0 with the 100s and a wetsuit and my 50 lb. wing was half inflated at depth.

 

[aquaoren]

THANK YOU, DAA! I have two old steel 72s that I have been considering doubling up, and I hadn't been able to get any good data on their buoyancy. I was considering buying a fish scale. You have saved me the trouble, while simultaneously letting me know that they would NOT be good choices for doubles for me in cold water.

I have a set of doubled 72's and with a 8lbs V-weight and in a dry suit, I'm pretty much right on.
Excellent set as they are very light and manageable on shore and trim nicely in the water. The water here isn't warm either You may need a heavier V-weight though to compensate for salt water.

 

[bradshsi]

The 72 I own is slightly negative at the end of the dive.

Although I probably should, I usually don't alter my weight when I change between that and my other tank which is a PST E7 80.

 

[SeanQ]

How much negative buoyancy would the bands add for a set of doubles this size?