What Changes Would You Make to A Meg?

Gilles · 24th July 2006, 11:18

Nothing like a 20km cycle ride on the sandy beaches of the South China Sea to calm down.

500 pounds of force is quite significant, especially if one were to rely on the clamps to hold that in. Surely there are options that are potentially feasible. Testing of the sensors prior to going in prevents aborted dives, hence I'll risk further insult.

Perhaps a jig that you install the Meg into to safely contain the situation? A jig to contain 500 pounds of tension should not be that significant in terms of weight and size.

Or maybe a single plug that enables disconnection of all the sensors so they can be re-connected inside a dedicated pot. The pot itslef could record the response function(s) with a bit of hard/software.

Aknowledgement: For Ron Micjan for his ever so helpful feedback.

jhaaja · 24th July 2006, 11:46

Quote: (Originally Posted by sabgia)

Nothing like a 20km cycle ride on the sandy beaches of the South China Sea to calm down.

500 pounds of force is quite significant, especially if one were to rely on the clamps to hold that in. Surely there are options that are potentially feasible. Testing of the sensors prior to going in prevents aborted dives, hence I'll risk further insult.

Perhaps a jig that you install the Meg into to safely contain the situation? A jig to contain 500 pounds of tension should not be that significant in terms of weight and size.

Or maybe a single plug that enables disconnection of all the sensors so they can be re-connected inside a dedicated pot. The pot itslef could record the response function(s) with a bit of hard/software.

Aknowledgement: For Ron Micjan for his ever so helpful feedback.

Isn`t the cell holder one piece that can be eaily removed from the head?
Why not design a pressure vessel where you can just throw that cell holde? You need to build electrical connections to the cells, overpressure/bleed valve and a valve to add oxygen. I think it is not wise to stress the actual Rebreather head.

JH

Gilles · 24th July 2006, 12:51

Quote: (Originally Posted by jhaaja)

Isn`t the cell holder one piece that can be eaily removed from the head?
Why not design a pressure vessel where you can just throw that cell holde? You need to build electrical connections to the cells, overpressure/bleed valve and a valve to add oxygen. I think it is not wise to stress the actual Rebreather head.

JH

You can remove the sensor carriage but you can't disconnect the sensor cables from the head. Hence a plug to dis/re connect. The plug on the sensor end could plug into a receptacle in the pressure pot.

RonMicjan · 24th July 2006, 14:06

easy there, most folks here know that I tend to hit it pretty hard but smiling and laughing all the way. My daddy always used to say, that if you cant laugh at your own mistakes, then you ought not be making them. My latest favorite quote is "anything worth taking seriously, is worth making fun of"

so, apoligies if you were unable to see the humor in that, but the math and possible consequenses are as serious as they could be.

The next generation of sensor carriage will come with a connector for disconnecting and removing it, I am not certain if it will be retrofittable to a current meg, but quite possible.

cheers!

question of the day: how many smilies must one add to a post, to offset dropping someones face into the curb??

Gilles · 7th February 2008, 06:33

One change, not mentioned above, is....

replace the existing 2-point calibration system, with a single-point high FO2.

Why??? because the existing 2-point manner is clunky and doesn't add any value. Worse, it hides any apparent cell non-linearity by allowing a the high FO2 cal at a hi/low mV ratio that is less than what it should be. Worse still, few understand the principals of 2-point cal and it is more susceptible to error.

I can elaborate further if required

.

Outlaw · 7th February 2008, 06:47

Quote: (Originally Posted by Explorer)

That's the beauty of the Meg system.

I use the Halcyon SS backplate with my regular one piece webbing I use for teaching with my OC twin setup.

Oh yes, I removed the plastic clips on the CL's and now use small bolt snaps with bungies attached to the backplate. Slick, real slick.

Hey guys,

i cannot believe that this tread got to 3-4 pages and there no picture yet so others can see what exactly you are talking about? i do understand what bolt snaps are, but with a picture one get so see, "how big?, how long?" where to attach? etc.

Please send some pictures if you can. it would be really helpful. it doesn't cost a thing, and instead you can help your fellow megdivers to better prepare their unit, or to realise how it wouldbe before they start to adjust and maybe not being able to bring it back before to is original state... i.e counterlung velcro being cut etc...

Thanks.

Spyros

quickean · 7th February 2008, 07:03

Wouldn't change a thing. Everything is ridiculously well thought out.

Mike · 7th February 2008, 11:23

Quote: (Originally Posted by RonMicjan)

If you do a proper flush, you can exchange the gas in the entire loop in about 2.5 seconds, with all parts where they are now, and not inhale at all. cross arms over counterlungs, with left elbow specifically hold down bottom of left counterlung to help direct ADV flow around the loop instead of straight down to the OPV, right hand presses down on the ADV to activate it, loosen lips around mouthpeice and exhale while flushing.

bugger me - you must rock at twister!
I suck at it - so just breath out my nose to flush...

mike

netmage · 7th February 2008, 13:22

Quote: (Originally Posted by Gilles)

One change, not mentioned above, is....

replace the existing 2-point calibration system, with a single-point high FO2.

Why??? because the existing 2-point manner is clunky and doesn't add any value. Worse, it hides any apparent cell non-linearity by allowing a the high FO2 cal at a hi/low mV ratio that is less than what it should be. Worse still, few understand the principals of 2-point cal and it is more susceptible to error.

I can elaborate further if required

.

The 2.06/2.5 does this... at least from a user interface perspective. Removes the 'at ambient air' step

brandonmc · 7th February 2008, 15:42

Quote: (Originally Posted by netmage)

The 2.06/2.5 does this... at least from a user interface perspective. Removes the 'at ambient air' step

huh??

24th July 2006, 11:18	#31 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 761	Re: What Changes Would You Make to A Meg? Nothing like a 20km cycle ride on the sandy beaches of the South China Sea to calm down. 500 pounds of force is quite significant, especially if one were to rely on the clamps to hold that in. Surely there are options that are potentially feasible. Testing of the sensors prior to going in prevents aborted dives, hence I'll risk further insult. Perhaps a jig that you install the Meg into to safely contain the situation? A jig to contain 500 pounds of tension should not be that significant in terms of weight and size. Or maybe a single plug that enables disconnection of all the sensors so they can be re-connected inside a dedicated pot. The pot itslef could record the response function(s) with a bit of hard/software. Aknowledgement: For Ron Micjan for his ever so helpful feedback. __________________ Gilles http://www.dirrebreather.com
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24th July 2006, 11:46	#32 (permalink)
jhaaja Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Mar 2005 Location: Finland Posts: 867	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by sabgia) Nothing like a 20km cycle ride on the sandy beaches of the South China Sea to calm down. 500 pounds of force is quite significant, especially if one were to rely on the clamps to hold that in. Surely there are options that are potentially feasible. Testing of the sensors prior to going in prevents aborted dives, hence I'll risk further insult. Perhaps a jig that you install the Meg into to safely contain the situation? A jig to contain 500 pounds of tension should not be that significant in terms of weight and size. Or maybe a single plug that enables disconnection of all the sensors so they can be re-connected inside a dedicated pot. The pot itslef could record the response function(s) with a bit of hard/software. Aknowledgement: For Ron Micjan for his ever so helpful feedback. Isn`t the cell holder one piece that can be eaily removed from the head? Why not design a pressure vessel where you can just throw that cell holde? You need to build electrical connections to the cells, overpressure/bleed valve and a valve to add oxygen. I think it is not wise to stress the actual Rebreather head. JH
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24th July 2006, 12:51	#33 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 761	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by jhaaja) Isn`t the cell holder one piece that can be eaily removed from the head? Why not design a pressure vessel where you can just throw that cell holde? You need to build electrical connections to the cells, overpressure/bleed valve and a valve to add oxygen. I think it is not wise to stress the actual Rebreather head. JH You can remove the sensor carriage but you can't disconnect the sensor cables from the head. Hence a plug to dis/re connect. The plug on the sensor end could plug into a receptacle in the pressure pot. __________________ Gilles http://www.dirrebreather.com
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24th July 2006, 14:06	#34 (permalink)
RonMicjan Cap Ron scourge of the NW Current Rebreather/s: Megalodon Dolphin Home Build Other Rebreather/s: Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Cape Disapointment, The Graveyard of the Pacific Posts: 1,081	Re: What Changes Would You Make to A Meg? easy there, most folks here know that I tend to hit it pretty hard but smiling and laughing all the way. My daddy always used to say, that if you cant laugh at your own mistakes, then you ought not be making them. My latest favorite quote is "anything worth taking seriously, is worth making fun of" so, apoligies if you were unable to see the humor in that, but the math and possible consequenses are as serious as they could be. The next generation of sensor carriage will come with a connector for disconnecting and removing it, I am not certain if it will be retrofittable to a current meg, but quite possible. cheers! question of the day: how many smilies must one add to a post, to offset dropping someones face into the curb?? __________________ Ron "Life is pain princess, anyone who tells you different, is selling something", The Dread Pirate Wesley. www.tmishop.com Diving bits etc.
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7th February 2008, 06:33	#35 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 761	Re: What Changes Would You Make to A Meg? One change, not mentioned above, is.... replace the existing 2-point calibration system, with a single-point high FO2. Why??? because the existing 2-point manner is clunky and doesn't add any value. Worse, it hides any apparent cell non-linearity by allowing a the high FO2 cal at a hi/low mV ratio that is less than what it should be. Worse still, few understand the principals of 2-point cal and it is more susceptible to error. I can elaborate further if required. __________________ Gilles http://www.dirrebreather.com Last edited by Gilles : 7th February 2008 at 06:36.
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7th February 2008, 06:47	#36 (permalink)
Outlaw In search of Law breaking Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2006 Location: Cyprus, Nicosia Posts: 626	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by Explorer) That's the beauty of the Meg system. I use the Halcyon SS backplate with my regular one piece webbing I use for teaching with my OC twin setup. Oh yes, I removed the plastic clips on the CL's and now use small bolt snaps with bungies attached to the backplate. Slick, real slick. Hey guys, i cannot believe that this tread got to 3-4 pages and there no picture yet so others can see what exactly you are talking about? i do understand what bolt snaps are, but with a picture one get so see, "how big?, how long?" where to attach? etc. Please send some pictures if you can. it would be really helpful. it doesn't cost a thing, and instead you can help your fellow megdivers to better prepare their unit, or to realise how it wouldbe before they start to adjust and maybe not being able to bring it back before to is original state... i.e counterlung velcro being cut etc... Thanks. Spyros __________________ CMAS - IANTD - TDI Kamikazi Instrustor Trainer DIRRebreather Team Member ---------------------------- "Once an Outlaw, always an Outlaw"
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7th February 2008, 07:03	#37 (permalink)
quickean Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Mar 2006 Location: Michigan Posts: 124	Re: What Changes Would You Make to A Meg? Wouldn't change a thing. Everything is ridiculously well thought out.
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7th February 2008, 11:23	#38 (permalink)
Mike Prism 'prentice Current Rebreather/s: Prism Topaz Other Rebreather/s: Inspiration Classic Evolution Join Date: Feb 2005 Location: Melbourne Posts: 318	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by RonMicjan) If you do a proper flush, you can exchange the gas in the entire loop in about 2.5 seconds, with all parts where they are now, and not inhale at all. cross arms over counterlungs, with left elbow specifically hold down bottom of left counterlung to help direct ADV flow around the loop instead of straight down to the OPV, right hand presses down on the ADV to activate it, loosen lips around mouthpeice and exhale while flushing. bugger me - you must rock at twister! I suck at it - so just breath out my nose to flush... mike __________________ Open ....... Closed Mind ........ Loop
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7th February 2008, 13:22	#39 (permalink)
netmage Hello Kitty...... Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Dec 2005 Location: Coconut Creek, FL Posts: 321	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by Gilles) One change, not mentioned above, is.... replace the existing 2-point calibration system, with a single-point high FO2. Why??? because the existing 2-point manner is clunky and doesn't add any value. Worse, it hides any apparent cell non-linearity by allowing a the high FO2 cal at a hi/low mV ratio that is less than what it should be. Worse still, few understand the principals of 2-point cal and it is more susceptible to error. I can elaborate further if required. The 2.06/2.5 does this... at least from a user interface perspective. Removes the 'at ambient air' step
(Offline)

7th February 2008, 15:42	#40 (permalink)
brandonmc New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Oct 2006 Location: Philadelphia Posts: 75	Re: What Changes Would You Make to A Meg? Quote: (Originally Posted by netmage) The 2.06/2.5 does this... at least from a user interface perspective. Removes the 'at ambient air' step huh?? __________________ http://mcjangles.blogspot.com/
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