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ScubaVideos
03-29-2008, 14:50
http://www.scubadivingtube.com/uploads/thumbs/YbHF2GupmarVmFcozQuv.jpgDuration: 00:07:33

View this Video! (http://www.scubadivingtube.com/play.php?vid=351)



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ScubaToys Larry
03-29-2008, 14:56
I must admit... I'm kinda proud of this one....

plot
03-29-2008, 15:13
35 minutes for the high pressure hose? crazy

terrillja
03-29-2008, 15:30
All I could think of when I saw the Michael Bolton tape was Office Space and the Bobs.

Funny video though.

Splitlip
03-29-2008, 15:39
God, I want to work at Scuba Toys.

Good demo. Larry. Most believe the HP will go faster.

mudshark
03-29-2008, 16:30
Well done!

fire diver
03-29-2008, 16:52
I love it! ScubaToys is so freaking cool, just like Michael Bolton.....

mark44883
03-29-2008, 17:05
good way to ruin two good hose !!!!!!!!!!!! dumb movie

mentalmarine
03-29-2008, 17:19
good way to ruin two good hose !!!!!!!!!!!! dumb movie
Dont hate...


I liked it!!!! :smiley32:

Xspect
03-29-2008, 17:26
Very nice work guys

jwdizney
03-29-2008, 17:42
I love it! ScubaToys is so freaking cool, just like Michael Bolton.....
:smilie39::smilie39:

Great video Larry!

aggie99
03-29-2008, 17:43
That is great Larry! Your scuba creativity is unmatched!

DivingCRNA
03-29-2008, 17:58
That ruled. Now I know how to take out Dark Wolf and Lineman Larry once and for all! ROFL

danielh03
03-29-2008, 18:09
Do you think an OMS line cutter will do the trick?

coyote
03-29-2008, 19:37
Brilliant!
:smilie39::smilie39::smilie39:

Crimediver
03-29-2008, 20:21
Worthy of Mike Nelson himself!

WV Diver
03-29-2008, 20:33
Hmmmmm..........the SDI Solo Manual says it takes 22 min to drain an full AL80 with a ruptured HP hose at the surface. As per a study conducted by Advanced Diver Magazine. It also says that it takes 22 min at 4 ata (99').

ChrisA
03-29-2008, 21:26
http://www.scubadivingtube.com/uploads/thumbs/YbHF2GupmarVmFcozQuv.jpgDuration: 00:07:33

View this Video! (http://www.scubadivingtube.com/play.php?vid=351)



To view other scuba vids, or post your own, visit Scuba Diving Videos (http://www.scubadivingtube.com)

I got to see this happen once for real. One of the local dive boats has a real high deck. It's about 8 feet from deck to water. You just do a giant stride and it takes a noticeable 1/2 second or so to hit the water. So,... my buddy jumps off but is air integrated computer wedges somehow into the hinge of the gate. He forgot to clip the console and it was just hanging when he stepped off. So on the why down he is jerked around backwards when the HP goes tight and then rips loose. There was a very impressive amount of bubbles in the water. Needless to say we called the dive and swam around to the stern of the boat and climbed out. His tank was down only a few hundred PSI. We were able to find a spare hose some place

plot
03-30-2008, 01:08
That ruled. Now I know how to take out Dark Wolf and Lineman Larry once and for all! ROFL

just gotta put up the closed sign and lock them outside right?

BSea
03-30-2008, 09:21
Funny & educational too. :smiley20: 1st musical tanks, then this. Pretty soon you can have a whole instructional video set on CDs.

MicahEW
03-31-2008, 17:30
nice promo guys crazyness about the HP hose.

fkostyun
04-01-2008, 15:09
Very cool - I would have loved to make that video! (and I personally think that Yanni would be an even better choice than Michael Bolton)

EuphoriaII
04-01-2008, 16:29
Wow, they have a lot of spare time on their hands. More proof that I need to buy more stuff from ST.
Great vid

crgjpg
07-10-2008, 12:35
This is a very good video. I wish I had seen it sooner. Being a fairly new diver, I was not aware of how long air would last with the high or low pressure hoses having a malfunction. In February, I was checking my air pressure to becasue the dive master was asking. While looking at it, I had an o ring burst on my pressure gauge. I was at about 1000 psi. Through the large amount of bubbles I saw the pressure was not dropping rapidly. The dive master played around with it for a few minutes and then we started or ascent. We did a safety stop for 3 minutes. I ended up with about 450 psi.

Sasha_K
07-10-2008, 13:04
Very funny. More, more!

mjcoyne
07-10-2008, 14:53
That was awesome!

Vegas
07-10-2008, 15:18
Wow! you guys have a lot of time on your hands don't you?

Useful, informative, and .....um.....entertaining! ya that's it!

really, I did enjoyed it....thanks!

mike_s
07-10-2008, 16:55
I must admit... I'm kinda proud of this one....


35 minutes for the high pressure hose? crazy


so how about we cut a low pressure hose now?


good way to ruin two good hose !!!!!!!!!!!! dumb movie


I'm thinking he was maybe trying to push the newer MiFlex hose... but the video is so long I haven't watched it all yet.


EDIT: They did cut the LP hose.... but some how magically the HP hose gauge got re-attached and he holds up the pressure gauge to show it! :smilie39:


2nd EDIT: Which leads me to this question. can you fold over and crimp a LP hose to stop or slow it bleeding air? like you would a garden hose? My guess is not because the average garden hose is at about 20-35psi and the LP intermediate pressure should be above 100psi and when not in free flow more like 135-150psi.

Sasha_K
07-14-2008, 21:45
On a second watch...quick question. Had you guys done it any deeper, would the tanks leak faster? Assuming you guys did it in about 10-15 feet, say you were at double the depth, would the air leak twice that speed?

And, I'd also love to know if you would be able to crimp the LP hose to at least slow down the leak. Anyone?

navyhmc
07-14-2008, 22:29
On a second watch...quick question. Had you guys done it any deeper, would the tanks leak faster? Assuming you guys did it in about 10-15 feet, say you were at double the depth, would the air leak twice that speed?

It depends. With the LP hose, if the regulator is balanced, it should leak out at the about the same rate. If the regulator is unbalanced, it is likely to leak out slower as the pressure will be closer to the water pressure.


And, I'd also love to know if you would be able to crimp the LP hose to at least slow down the leak. Anyone?

Good question: Another go Larry??? :smiley20:


good way to ruin two good hose !!!!!!!!!!!! dumb movie

What do you mean? This was all in the name of science! And be honest, all of us have been curious about this, right?

Sansho
07-14-2008, 23:06
Eggcellent!

Sasha_K
07-14-2008, 23:22
On a second watch...quick question. Had you guys done it any deeper, would the tanks leak faster? Assuming you guys did it in about 10-15 feet, say you were at double the depth, would the air leak twice that speed?

It depends. With the LP hose, if the regulator is balanced, it should leak out at the about the same rate. If the regulator is unbalanced, it is likely to leak out slower as the pressure will be closer to the water pressure.



Hm. Never thought about it that way. So, air would leak out faster on land then in water?

navyhmc
07-15-2008, 00:56
Air, because there's less resistance?????? :D

Sasha_K
07-15-2008, 09:16
Air, because there's less resistance?????? :D

Not sure how to take your answer navyhmc :-)

navyhmc
07-15-2008, 11:34
It's a simple matter of density. Water is 50 times more dense than air so there is more resistance to an outward flow of air against water that resistence of air flow to air.

Think about this: As a kid, what was easier to blow bubbles in at McDonalds? A glass of soda/coke/pop or a freshly poured chocolate.strawberry/vanilla shake? Pop, as there was less resistance to the air. Now, with the shake, as it melts, the density decreases and it's easier to make sister annoying bubbles. Same with a cut hose.

That's my theory and I'm sticking with it! :D

BSea
07-15-2008, 12:19
It's a simple matter of density. Water is 50 times more dense than air so there is more resistance to an outward flow of air against water that resistence of air flow to air.

Think about this: As a kid, what was easier to blow bubbles in at McDonalds? A glass of soda/coke/pop or a freshly poured chocolate.strawberry/vanilla shake? Pop, as there was less resistance to the air. Now, with the shake, as it melts, the density decreases and it's easier to make sister annoying bubbles. Same with a cut hose.

That's my theory and I'm sticking with it! :DActually, I think once you exceed the amount of pressure to to blow the bubbles, they would empty at the same rate. If it took 2 psi of pressure to blow a bubbles in the soda, and 10 psi to blow bubbles in the shake, but the straw was being pressurized to 135 psi, then the bubbles would be produced at the same rate till the tank pressure dropped to 10 psi.

But since air compresses much easier than water, the volume of air would double at 33ft to produce the same psi, the tank 2would empty twice as fast at 33 ft than at the surface, and 3 times as fast at 66 ft.

So I believe the tank would empty faster at depth just as breathing the air at depth empties the tank faster than breathing at the surface.

ScubaToys Larry
07-15-2008, 13:08
Actually, the difference at depth is negligible. Actually, slightly slower at depth as you have pressure trying to stop the air from escaping - but the differential between 15 psi and 60 psi is pretty insignificant when dealing with 3000 psi... So in tests that have been done, at 100 feet or so, it will take about 2-3 seconds longer to drain a tank with a cut HP hose... that's the only difference.

BSea
07-15-2008, 15:22
Actually, the difference at depth is negligible. Actually, slightly slower at depth as you have pressure trying to stop the air from escaping - but the differential between 15 psi and 60 psi is pretty insignificant when dealing with 3000 psi... So in tests that have been done, at 100 feet or so, it will take about 2-3 seconds longer to drain a tank with a cut HP hose... that's the only difference.Well I feel stupid. I was back looking at the LP. With the small hole in the HP fitting, you are only going to squeeze so many molecules through that hole at a time. Making the air denser doesn't mean the molecules are smaller, only closer together, so depth would have nothing to do with it once your pressure is so high that it doesn't allow amy more volume through the hose.

plot
07-15-2008, 16:20
Actually, the difference at depth is negligible. Actually, slightly slower at depth as you have pressure trying to stop the air from escaping - but the differential between 15 psi and 60 psi is pretty insignificant when dealing with 3000 psi... So in tests that have been done, at 100 feet or so, it will take about 2-3 seconds longer to drain a tank with a cut HP hose... that's the only difference.

when every breath counts, that's a HUGE difference!

;)

Sasha_K
07-15-2008, 16:26
Thanls Larry and bsea. I thought the difference would be bigger, but I guess not.

How about trying to fold the LP hose to prevent/slow down the air? Do you tihnk that's doable?

Man, this is calling for another video :-)

Joe L
07-15-2008, 20:24
LOL, Great Movie

plot
07-15-2008, 21:09
Thanls Larry and bsea. I thought the difference would be bigger, but I guess not.

How about trying to fold the LP hose to prevent/slow down the air? Do you tihnk that's doable?

Man, this is calling for another video :-)

The bottom line is, don't cut your LP hose.

If you had doubles and an isolation valve, you'd have to be quick to cut it off before it blead both tanks... scary thought.

Sasha_K
07-15-2008, 21:58
Of course I wouldnt do it. I'm just curious. And it may actually happen one day, you never know :-)

NeveSSL
07-23-2008, 04:15
Wow... that was neat!

I've either missed it or its obvious...

The LP hose went faster because it was larger ID, correct?

Brandon

Sansho
07-23-2008, 05:45
The LP hose went faster because it was larger ID, correct?

The LP hose was quicker because the fitting at the first stage has a larger ID than on the HP hose. The video showed the HP fitting with it's much smaller opening.

DonnyGreen
07-23-2008, 10:32
Awesome clips...who knew it was that hard to sever a hose?

scubamarc
07-23-2008, 11:36
if low pressure hosed empties a tank under minute, should there be a reducer fitting on the bc/drysuit inflater hoses. Would reducing the output affect the overall performance?

NeveSSL
07-23-2008, 15:19
The LP hose went faster because it was larger ID, correct?The LP hose was quicker because the fitting at the first stage has a larger ID than on the HP hose. The video showed the HP fitting with it's much smaller opening.


Ahh.... ok. I missed that somehow. Are the hoses the same same ID, it just comes down the 1st stage fitting? Thanks.

Brandon

reeldive
07-23-2008, 17:17
If u look at the regulator HP hole u will see that it also has a very small opening as well as the hose side. double insurance?

reeldive
07-23-2008, 17:21
So here's another question. On newer regulators the HP hose is a different thread size as well, where as on older regs both hp and LP hoses have the same size thread. Why?

ps. I know the answer as I've witnessed it on one of the older Calypso !V regs once.

ScubaToys Larry
07-23-2008, 17:30
To stop someone from accidently screwing an inflator into the HP port, turning on the tank, and watching the hose blow up to the size of a football them blow up with a huge bang, causing the diver to turn his drysuit into a "wetsuit".

Largo
07-23-2008, 20:07
Larry,
Hi. Could you explain again, the mechanism whereby the tank empties more slowly with a cut HP hose, than LP hose?

Lone Frogman
07-24-2008, 03:46
The fitting on the end of the high pressure hose that screws into the first stage has only an i.d. the size of a pin hole.

NeveSSL
07-24-2008, 03:50
I.D. is inside diameter, too. Not identification, FWIW.

Don't meant to insult you or anything, but that confused the crap out of me for a bit while I was plumbing my SW aquarium. :D

Brandon

Lone Frogman
07-24-2008, 04:02
Its inside diameter.

NeveSSL
07-24-2008, 04:14
Yeah, thats what I said!

:smiley29:

:D

Brandon

Black-Gorrilla
07-24-2008, 13:00
this was the best movie you've made so far.
Thanks Larry and ST Crew.

digitalman
07-24-2008, 13:36
Nice movie. Informative and entertaining.

character157
07-27-2008, 14:29
All I could think of when I saw the Michael Bolton tape was Office Space and the Bobs.

Funny video though.


Haha I agree, thats the first thing I thought of. Great video guys

Jenn
08-09-2008, 22:31
Good demonstration scuba toys. Looks like you guys have so much fun on the job.

csterling95
08-14-2008, 17:21
amazing how long the high pressure hose lasts!!!