tonka97
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I just purchased double Worthington X7 Steel HP100s, in prep for IntroCave/Full Cave;
Has anyone cave diving experience with these tanks? (Each tank is 3.4 lbs lighter than the older steel HP 100s.)
Here is the argument against these tanks:
"Double steel HP100s position too much weight on the upper part of your body, and you will be struggling to maintain horizontal trim during cave diving, as compared to double LP85s. The preferred LP85s are lighter, and can be overfilled 10%, providing nearly the same amount of gas as the HP100s. The LP85s are longer (avoiding excessive weight toward the divers head) thereby enabling the cave diver to better maintain the necessary horizontal trim. Skilled cave divers who use double steel HP100s are essentially non-existent".
BTW: The older steel HP100s weighed 36.4 lbs empty, compared to the newer Worthington tanks that weigh only 33 lbs empty. Perhaps that 3.4 x 2 = 6.8 lbs difference for doubles contributed to the initial criticism of steel HP 100s.
By contrast the empty weight of the OMS LP85 is listed at 31 lbs.
Old Double steel HP 100s: 72.8 lbs.
New X7 Double steel HP 100s: 66 lbs
Double steel LP 85s: 62 lbs
Buoyancy X7 Steel HP 100: Full -10 Empty -2.5 pounds each tank.
Has anyone cave diving experience with these tanks? (Each tank is 3.4 lbs lighter than the older steel HP 100s.)
Here is the argument against these tanks:
"Double steel HP100s position too much weight on the upper part of your body, and you will be struggling to maintain horizontal trim during cave diving, as compared to double LP85s. The preferred LP85s are lighter, and can be overfilled 10%, providing nearly the same amount of gas as the HP100s. The LP85s are longer (avoiding excessive weight toward the divers head) thereby enabling the cave diver to better maintain the necessary horizontal trim. Skilled cave divers who use double steel HP100s are essentially non-existent".
BTW: The older steel HP100s weighed 36.4 lbs empty, compared to the newer Worthington tanks that weigh only 33 lbs empty. Perhaps that 3.4 x 2 = 6.8 lbs difference for doubles contributed to the initial criticism of steel HP 100s.
By contrast the empty weight of the OMS LP85 is listed at 31 lbs.
Old Double steel HP 100s: 72.8 lbs.
New X7 Double steel HP 100s: 66 lbs
Double steel LP 85s: 62 lbs
Buoyancy X7 Steel HP 100: Full -10 Empty -2.5 pounds each tank.