simple tank size question

[GrumpyOldGuy]

I noticed the LP100's were a lot cheaper than the HP100's. The heavier LP tank may actually be more beneficial, in that I can reduce the 35lbs I currently need for ocean diving in the drysuit (with AL80's). I'm not in any hurry to buy any, but if a good deal comes around locally, I may make the plunge.


Steve

I hope you are not comparing an AL100 with a steel HP 100. The AL 100's fill at 3300 vs the 3442PSI on the steels. That part is not bad, but the buoyancy characteristics are not as nice as the Steel 100. The amount of air in the tank is the same, but AL is less dense than steel (and weaker, so the walls are thicker) and you are not able to trade nearly as much tank weight in place of lead like you can with a HP steel tank.

 

[elan]

I noticed the LP100's were a lot cheaper than the HP100's. The heavier LP tank may actually be more beneficial, in that I can reduce the 35lbs I currently need for ocean diving in the drysuit (with AL80's). I'm not in any hurry to buy any, but if a good deal comes around locally, I may make the plunge.


Steve

How heavy the tank is has little to do with the buoyancy of the tank in most cases. LP tanks are bigger thus more floaty. LP 104/108 is huge. You will not take any lead off compared to hp 100 if you get worthingtons IIRC. Oms (faber) 112 will actually require more weight than HP100 by worthington

 

[Katch]

But I will take weight off my belt compared to the AL80's that I've been using.

And I was comparing the steel LP and HP 100's vs and aluminum 80. But very good points on the size/displacement issue. I guess the bigger steel LP tanks would be more buoyant than the smaller steel HP (that is probably made w thicker steel to handle the higher pressure).

Thanks for all the comments and discussion on overfills too!

Steve

 

[Brewone0to]

Perhaps viewing the info at this site will help clear things up for you.
At the very least, things should at least become "as clear as mud".
Scuba Cylinder Specification Chart from Huron Scuba, Ann Arbor Michigan

 

[captain]

There may be simple questions asked here but mostly never simple answers.

 

[Katch]

Duh...

Maybe I should've paid a little attention to the top article on our very own ScubaBoard Home Page:

http://www.scubaboard.com/forums/content/352-diving-right-tank.html


Of course, you guys/gals have been most helpful too.


Steve