What Changes Would You Make to A Meg?

RonMicjan · 29th June 2006, 06:25

Quote: (Originally Posted by moley)

Hi Cedric,

Given my level of experience I feel that when practicing emergency ascents 'off the loop' that a pulldump would make the control of the unit a little easier, as opposed to having to open and close the loop to vent gas, and with the BOV fitted, that is not really an ideal option. If in 'the real world' I have come off the loop it is likely that the task loading would have increased..why is the OPV fitted to the bottom of the lung?

I am sure I will probably feel differently once my experience level increases.:o

out of curosity, who was your instructor?

the OPV is on the bottom of the lung so you can flush water out of it that may get in via the loop falling out of your mouth (or getting kicked out,which is more likely). were you not taught that skill?

if you have to ascend off the loop, you occasionally roll right so it vents, just like a normal ascent.

a pull dump high is an invitation for all sorts of crap to get stuck in it, like cave silt, rust flakes etc.

pabusk · 29th June 2006, 07:07

Quote: (Originally Posted by cedricverdier)

Hi Moley,

Why do you want a dump valve on the CL? Anything you can't do with your nose or the OPV?

Cheers

Might be usefull in OC bailout scenarios

Cheers,
apul

Joe · 29th June 2006, 11:28

Yes. Not initially but after 2nd dive & after day one on a live aboard trip. I dry it out between dives & at some point have to recalibrate. My experience has been the same as described in the thread on that topic. Day 2 I get .18 in ambient air, re calibrate & it stays spot on for the rest of the trip. There must be a way to fix or avoid that.....

Quote: (Originally Posted by wedivebc)

Has this been a problem for you with the meg? I know the inspo doesn't like to be set on it's back post dive but I haven't seen too much moisture around the meg sensors yet. (warning MEG Newbie)

moley · 29th June 2006, 17:31

Quote: (Originally Posted by RonMicjan)

out of curosity, who was your instructor?

the OPV is on the bottom of the lung so you can flush water out of it that may get in via the loop falling out of your mouth (or getting kicked out,which is more likely). were you not taught that skill?

if you have to ascend off the loop, you occasionally roll right so it vents, just like a normal ascent.

a pull dump high is an invitation for all sorts of crap to get stuck in it, like cave silt, rust flakes etc.

Thanks for the input Ron...obviously all aspects of flood removal and bailoff are covered within the Meg training....I was however under the impression that this was about what improvements a user would like to make to his unit. In my case, maybe wrongly, I think that the provision of a pull dump, in particular in a high task load scenario on the ascent,may be a good thing. Remember, with the bov in situ, you have in effect a closed loop and are threrfor relying on the opv to vent gas on the way up.

Dont APD have a pulldump on the lung for just such a thing?

**Mixaddict** · 30th June 2006, 00:52

Maybe a nice plastic yellow back cover would be nice!:p

Steve · 30th June 2006, 00:58

Quote: (Originally Posted by moley)

Thanks for the input Ron...obviously all aspects of flood removal and bailoff are covered within the Meg training....I was however under the impression that this was about what improvements a user would like to make to his unit. In my case, maybe wrongly, I think that the provision of a pull dump, in particular in a high task load scenario on the ascent,may be a good thing. Remember, with the bov in situ, you have in effect a closed loop and are threrfor relying on the opv to vent gas on the way up.

Dont APD have a pulldump on the lung for just such a thing?

Why not just wind out the OPV or manually operate it if need be?

As for improvements;

Back mounted lungs
Standard with an OC/CC DSV
Choice of HUD display system.
Insulated can for increased scrubber duration
The latches anoy me from time to time
A way of slowing down and speeding up time (more bottom time and less deco)

cedricverdier · 30th June 2006, 01:05

Quote: (Originally Posted by Steve)

Choice of HUD display system.

Hi Steve,

Please could you explain?

Cheers

Steve · 30th June 2006, 01:18

Quote: (Originally Posted by cedricverdier)

Hi Steve,

Please could you explain?

Cheers

I prefer the Green=good, red=bad style of HUD display.

I look at my displays often enough to know what is going on but appreciate that others like being able to know what there pO2 is by looking at the HUD.

If I were given a vote I would put 2 led in the HUD. It would blink green or red for the comparison to the setpoint for each cell.

So why 2 LEDs then?? The other could be the deco LED. Green=at stop depth, red = off stop depth and amber = stop change approaching

Gilles · 23rd July 2006, 02:49

The Meg is perfect, except

1) Attachment for sensor carriage to enable pressurization of sensors to about 1.6 bar (to pre-dive check sensors),

2) Cant really dil flush off loop. Uncertain however if another hole in the inhale CL (for another dumpvalve) is warranted.

JonnyB · 23rd July 2006, 08:34

Quote: (Originally Posted by sabgia)

2) Cant really dil flush off loop. Uncertain however if another hole in the inhale CL (for another dumpvalve) is warranted.

Could you please elaborate what you mean by this? Is it that you do not have an ADV on your meg?

/Jonny

29th June 2006, 06:25	#11 (permalink)
RonMicjan Would rather be diving... Current Rebreather/s: Megalodon Dolphin Home Build Other Rebreather/s: Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Portland Oregon USA Posts: 1,202	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by moley) Hi Cedric, Given my level of experience I feel that when practicing emergency ascents 'off the loop' that a pulldump would make the control of the unit a little easier, as opposed to having to open and close the loop to vent gas, and with the BOV fitted, that is not really an ideal option. If in 'the real world' I have come off the loop it is likely that the task loading would have increased..why is the OPV fitted to the bottom of the lung? I am sure I will probably feel differently once my experience level increases.:o out of curosity, who was your instructor? the OPV is on the bottom of the lung so you can flush water out of it that may get in via the loop falling out of your mouth (or getting kicked out,which is more likely). were you not taught that skill? if you have to ascend off the loop, you occasionally roll right so it vents, just like a normal ascent. a pull dump high is an invitation for all sorts of crap to get stuck in it, like cave silt, rust flakes etc. __________________ http://www.tmishop.com CCR Training, sales and diving bits Dealer for Megalodon CCR's, Oxycheq, Aerospace Lubricants Tribolube, H2Odyssey, Haskel Sport Booster, Gas Fill Whips and more... www.columbiarivermarineassistance.com Marine Assistance and Rescue
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29th June 2006, 07:07	#12 (permalink)
pabusk RBW Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Not Bought Yet Inspiration Classic Join Date: Dec 2005 Location: Holland Posts: 158	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by cedricverdier) Hi Moley, Why do you want a dump valve on the CL? Anything you can't do with your nose or the OPV? Cheers Might be usefull in OC bailout scenarios Cheers, apul
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29th June 2006, 11:28	#13 (permalink)
Joe RBW Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Oct 2005 Location: Florida, USA Posts: 345	Re: What Changes Would You Make to A Meg? Yes. Not initially but after 2nd dive & after day one on a live aboard trip. I dry it out between dives & at some point have to recalibrate. My experience has been the same as described in the thread on that topic. Day 2 I get .18 in ambient air, re calibrate & it stays spot on for the rest of the trip. There must be a way to fix or avoid that..... Quote: (Originally Posted by wedivebc) Has this been a problem for you with the meg? I know the inspo doesn't like to be set on it's back post dive but I haven't seen too much moisture around the meg sensors yet. (warning MEG Newbie)
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29th June 2006, 17:31	#14 (permalink)
moley RBW Member Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Megalodon Sport Kiss Join Date: Nov 2005 Location: wiltshire, Uk Posts: 288	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by RonMicjan) out of curosity, who was your instructor? the OPV is on the bottom of the lung so you can flush water out of it that may get in via the loop falling out of your mouth (or getting kicked out,which is more likely). were you not taught that skill? if you have to ascend off the loop, you occasionally roll right so it vents, just like a normal ascent. a pull dump high is an invitation for all sorts of crap to get stuck in it, like cave silt, rust flakes etc. Thanks for the input Ron...obviously all aspects of flood removal and bailoff are covered within the Meg training....I was however under the impression that this was about what improvements a user would like to make to his unit. In my case, maybe wrongly, I think that the provision of a pull dump, in particular in a high task load scenario on the ascent,may be a good thing. Remember, with the bov in situ, you have in effect a closed loop and are threrfor relying on the opv to vent gas on the way up. Dont APD have a pulldump on the lung for just such a thing?
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30th June 2006, 00:52	#15 (permalink)
Mixaddict Randy Thornton Current Rebreather/s: Inspiration Vision Evolution Optima Other CCR Dolphin Other Rebreather/s: Inspiration Classic Other CCR Dolphin Join Date: Jan 2006 Location: Draper, Utah / Ft. White, Florida Posts: 637	Re: What Changes Would You Make to A Meg? Maybe a nice plastic yellow back cover would be nice!:p
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30th June 2006, 00:58	#16 (permalink)
Steve Ladies bring a plate Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Classic Kiss MK 15.X Home Build Join Date: Feb 2005 Location: Perth - Australia Posts: 1,166	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by moley) Thanks for the input Ron...obviously all aspects of flood removal and bailoff are covered within the Meg training....I was however under the impression that this was about what improvements a user would like to make to his unit. In my case, maybe wrongly, I think that the provision of a pull dump, in particular in a high task load scenario on the ascent,may be a good thing. Remember, with the bov in situ, you have in effect a closed loop and are threrfor relying on the opv to vent gas on the way up. Dont APD have a pulldump on the lung for just such a thing? Why not just wind out the OPV or manually operate it if need be? As for improvements; Back mounted lungs Standard with an OC/CC DSV Choice of HUD display system. Insulated can for increased scrubber duration The latches anoy me from time to time A way of slowing down and speeding up time (more bottom time and less deco) Last edited by Steve : 30th June 2006 at 01:04.
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30th June 2006, 01:05	#17 (permalink)
cedricverdier S21 M.I.B. Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Worldwide! Posts: 498	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by Steve) Choice of HUD display system. Hi Steve, Please could you explain? Cheers __________________ Cedric Verdier PADI Course Director, IANTD-PSAI-TDI-DSAT-DAN-NAUI-CMAS Instructor Trainer Trimix (CCR and OC) and Cave Diving Instructor Trainer www.CedricVerdier.com DIRrebreather member
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30th June 2006, 01:18	#18 (permalink)
Steve Ladies bring a plate Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Classic Kiss MK 15.X Home Build Join Date: Feb 2005 Location: Perth - Australia Posts: 1,166	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by cedricverdier) Hi Steve, Please could you explain? Cheers I prefer the Green=good, red=bad style of HUD display. I look at my displays often enough to know what is going on but appreciate that others like being able to know what there pO2 is by looking at the HUD. If I were given a vote I would put 2 led in the HUD. It would blink green or red for the comparison to the setpoint for each cell. So why 2 LEDs then?? The other could be the deco LED. Green=at stop depth, red = off stop depth and amber = stop change approaching
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23rd July 2006, 02:49	#19 (permalink)
Gilles RBW Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 762	Re: What Changes Would You Make to A Meg? The Meg is perfect, except 1) Attachment for sensor carriage to enable pressurization of sensors to about 1.6 bar (to pre-dive check sensors), 2) Cant really dil flush off loop. Uncertain however if another hole in the inhale CL (for another dumpvalve) is warranted.
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23rd July 2006, 08:34	#20 (permalink)
JonnyB Johnny The Hatch Current Rebreather/s: MK 15.X Titan Other CCR Other SCR Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Megalodon Sport Kiss Classic Kiss Other CCR Other SCR Home Build Join Date: Jan 2005 Location: Sweden (Stockholm)/USA (Ft. Lauderdale, FL)/Cyprus(Ayia Napa) Posts: 1,034	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by sabgia) 2) Cant really dil flush off loop. Uncertain however if another hole in the inhale CL (for another dumpvalve) is warranted. Could you please elaborate what you mean by this? Is it that you do not have an ADV on your meg? /Jonny
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