Attaching AI transmitter to the 1st stage

[divad]

That would make another good poll

OK...I vote NO.

 

[ChuckP]

Something I didn't know about a HP failure...... Found this on a search - I knew from training how fast a free flow 2nd stage goes, just assumed the same on a 1st stage.


Here is a little test conducted by Curt Bowen of Advanced Diver Magazine at Eagle's Nest cave on Feb 12th for a small article to be placed in issue 17 of Advanced Diver Magazine.

The question He wanted to answer was:

How much time would it take to empty a full aluminum 80 cuft cylinder from 3000 psi to 0 for the following situations and would depth affect the times.

1. Failed Burst Disk
2. Failed HP Hose
3. Failed LP Hose
4. Free Flow high performance regulator 2nd stage.

He completed the test on the surface (0 feet) with 4 aluminum 80’s and a Zeagle D50 regulator.

Here are the results

1. Failed Burst Disk = 72 seconds
2. Failed HP Hose = 22 minutes
3. Failed LP Hose = 83 seconds
4. Free Flow High Performance Regulator = 255 seconds


He then repeated the test at 4 atm’s / 99ft (30m)

1. Failed Burst Disk = Same within a second or 2
2. Failed HP Hose = Same within a minute
3. Failed LP Hose = Same within a second or 2
4. Free Flow High Performance Regulator = 155 seconds

He then repeated the test at 8 atm’s / 231ft (70m) (Thanks)

1. Failed Burst Disk = Same within a second or 2
2. Failed HP Hose = did not complete due to time restraints but would assume it would be with a minute difference
3. Failed LP Hose = Same within a second or 2
4. Free Flow High Performance Regulator = 91 seconds

The results show the small amounts of time a diver would have to solve a major equipment failure while at deeper depths.

 

[John Bantin]

You can eliminate failure pionts by free-diving. Just sayin' ...

 

[Jay]

I really think this post should be stickied in a Must know-Safety section of the board.

Something I didn't know about a HP failure...... Found this on a search - I knew from training how fast a free flow 2nd stage goes, just assumed the same on a 1st stage.


Here is a little test conducted by Curt Bowen of Advanced Diver Magazine at Eagle's Nest cave on Feb 12th for a small article to be placed in issue 17 of Advanced Diver Magazine.

The question He wanted to answer was:

How much time would it take to empty a full aluminum 80 cuft cylinder from 3000 psi to 0 for the following situations and would depth affect the times.

1. Failed Burst Disk
2. Failed HP Hose
3. Failed LP Hose
4. Free Flow high performance regulator 2nd stage.

He completed the test on the surface (0 feet) with 4 aluminum 80’s and a Zeagle D50 regulator.

Here are the results

1. Failed Burst Disk = 72 seconds
2. Failed HP Hose = 22 minutes
3. Failed LP Hose = 83 seconds
4. Free Flow High Performance Regulator = 255 seconds


He then repeated the test at 4 atm’s / 99ft (30m)

1. Failed Burst Disk = Same within a second or 2
2. Failed HP Hose = Same within a minute
3. Failed LP Hose = Same within a second or 2
4. Free Flow High Performance Regulator = 155 seconds

He then repeated the test at 8 atm’s / 231ft (70m) (Thanks)

1. Failed Burst Disk = Same within a second or 2
2. Failed HP Hose = did not complete due to time restraints but would assume it would be with a minute difference
3. Failed LP Hose = Same within a second or 2
4. Free Flow High Performance Regulator = 91 seconds

The results show the small amounts of time a diver would have to solve a major equipment failure while at deeper depths.

 

[wetb4igetinthewater]

Life Ending Seconds • ADVANCED DIVER MAGAZINE • By Curt Bowen