Should I get HP-117 or HP-120 tanks?

[rddvet]

I totally agree.. and by no means was I suggesting "quit asking silly questions and go find an instructor" It just seemed like the point in the conversation that Draker would jump in and berate me for asking a question....

and it was a serious question as to why HP vs LP... I see HP being of benefit in salt.. but only in salt due to the extra weight an HP cylinder has.

I think we?re starting to see why draker doesnt lile you


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[rddvet]

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Wait. They let women im space?


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[DogDiver]

The trim issues encountered by cave divers is primarily related to side to side trim with secondary considerations given to cylinder placement when diving with multiple cylinders not just one cylinder. As to the HP 120s I alternate between LP85s and the HP120s depending on the cave dive planned profile. Trim wise there is no difference underwater between them. However on big frog kicks with 120s my legs will occasionally hit the cylinders. Also on shore when dealing with gravity the HP120s are ball busters.


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[twaldo]

I think we?re starting to see why draker doesnt lile you


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Love me or hate me... I'm still here, I broke the curve... Draker doesn't like me because I'm warmer in shorts n Tshirt than he is in a full drysuit and 5mil hood.

[twaldo]

The trim issues encountered by cave divers is primarily related to side to side trim with secondary considerations given to cylinder placement when diving with multiple cylinders not just one cylinder. As to the HP 120s I alternate between LP85s and the HP120s depending on the cave dive planned profile. Trim wise there is no difference underwater between them. However on big frog kicks with 120s my legs will occasionally hit the cylinders. Also on shore when dealing with gravity the HP120s are ball busters.


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This makes sense, I was presuming OP was either sidemount or backmount doubles.... I also presumed HP's were heavier than LP cylinders... that being said if they have the same trim, why use HP cylinders at all?

Thanks for the input.

[Terry D]

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What was the answer?

[RGU]

and it was a serious question as to why HP vs LP... I see HP being of benefit in salt.. but only in salt due to the extra weight an HP cylinder has.[/QUOTE]

Unless we drive 23 hours, we are in cold water.
A lot of wreck divers like LP 95s or HP100s doubled. They tend to work better when you are wearing Fourth Element Arctic under the dry suit.

[tbone1004]

This makes sense, I was presuming OP was either sidemount or backmount doubles.... I also presumed HP's were heavier than LP cylinders... that being said if they have the same trim, why use HP cylinders at all?

Thanks for the input.

one could argue so you aren't breaking the law when cave filling them...

practically speaking the buoyancy characteristics can be better for some divers and if you are wearing lead anyway then it may as well be in the tanks.

[rddvet]

Love me or hate me... I'm still here, I broke the curve... Draker doesn't like me because I'm warmer in shorts n Tshirt than he is in a full drysuit and 5mil hood.

No draker doesnt like you because you THINK you?re warmer in shorts not because you are. Science tells us otherwise and I dont think anyone can refute that.
You do you. But when youre in a cave and a dude swims by in shorts its hard not to shake your head and say wtf is wrong with that dude.
But I wasnt trying to speak for Draker.


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[tbone1004]

No draker doesnt like you because you THINK you?re warmer in shorts not because you are. Science tells us otherwise and I dont think anyone can refute that.
You do you. But when youre in a cave and a dude swims by in shorts its hard not to shake your head and say wtf is wrong with that dude.
But I wasnt trying to speak for Draker.


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buddy of mine has a saying "when you look like a manatee, you can dive like a manatee" particularly with regards to diving in cold water in shorts. If you're only doing hour long dives and you have a lot of bioprene I can get it.