Need help regarding rebreather ideas I have...

MPJScuba

Here is the information that you asked for, 550 is the tidal volumne and the resp rate 14.

Matt

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rdmmdr

if any of us should be diving it is Matt so lets get together and make a unit for him, i will contribute my biopak 60 for the core, we will need a surface compressor to run the air motor,the air motor. The opv and adv will have to be checked to prevent trauma. We will need a cam lever plate arrangement to run the clung. Who wants to machine the resulting parts. plus the adapter to his trak tube.
i can test here. i have the help of a respiratory therapist for the project.
rick

AD_ward9

Send a private message with your phone number, time zone and when is the best time to call you. I will give you a ring.

An O2 rebreather is probably the best bet, and safest. The problem is the closed loop and its affect on the ventilator controller. We have tons of actual test data doing this. Some of it confidential, but a lot we can share. We can discuss what you need over the phone, exchange an NDA, then I can send you some stuff that will likely help in your project.

Cheers,

Alex

MPJScuba

I have another idea, why don't I use an air tank and plug a regulator into the vent housing. I don't know if this is a possiblity or not but it sounds easy enough. We may need to make the regulator a more sensitive and maybe a little more equipment to make it work. It's thought.

Again thanks everyone for your advice and support, and for whatever help you can give. I'am definitly getting into rebreathers, it's going to be pretty cool.

Matt

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MPJScuba

Here's the info for you. Here's my e-mail address admin@scubadivingdream.com

Here's my at home mail address 888 Spring Hill Draw Woodbury, Mn 55125

ALso here is my cell phone number 651-248-2326 if that doesn't work here is my home number 651-731-4255.

Our time zone is central time A good time to call is anytime before 9:00pm and the easist is 9:00am

Let me know what else you need

Matt

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MPJScuba

Hey Rick I found your design. Heres a link to the old post. That I started when I joined the board. http://www.rebreatherworld.com/gener...breathers.html

Talk to you later,

Matt

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OceanOpportunity

Rick has made several good points.

To those viewing this thread, I wanted to offer several considerations, as I've been working with Matt for nearly three years now, and have observed him diving. While the technical/engineering prospects of using a rebreather are feasible, more practically there are several items to keep in mind when lending advice and any actual support:

1. Matt is 100% depenent on other divers to manipulate his ventilator and any other equipment during the dive. Adding a rebreather in the mix severely complicates the process for his dive team.

2. Matt also requires his vent 24/7. That being said, his lungs are entirely prone to the balance/unbalance of pressure in the system, and he has had pneumothorax previously (not diving related). During descent in particular, I am not convinced that any ADV out there would keep up with the volume required to keep up with keeping his lungs from collapsing. His descent rate is determined by his support team, again adding to their task load.

3. several issues with breathing resistence come into play. vent hoses are very small bore (20-22mm). This, coupled with the extra dead space in the circuit from the housed vent is begging for a CO2 retention problem, regardless of the position of the vent to the scrubber. The vent housing would need a means of being flushed regularly.

4. There must be an adequate means of removing moisture from the vent housing, as it is an electrically operated instrument. Further, moisture (including condensate) must be reduced prior to Matt's inhalation circuit, as he would be at risk of drowning

5. bailout is a MAJOR concern. Matt cannot bailout to OC as we can, and a failure of anything, causing an over or underpressurization, could cause a lung collapse. There would need to be an instantaneous switch to a redundant system. His dives to-date have been very shallow, such that he could be rushed to the surface in an emergency...while this isnt ideal for the obvious reasons, it has been most tangible with the available resources.

Those are some initial thoughts. I look forward to specific feedback, especially regarding the practicality of tackling this when the task-load is on other people.

MPJScuba

Hey Mike, I appreciate your comments but a lot of the thoughts and worries have been worked out. There was an actual baleout system on it. The moisture thing was not an issue, we already know what to do There's good points to bring up.

I know the risk that comes with a rebreather.

Well Mike my team and I can always adopt to doing things as we need to do them If we can make a system that works whats the big deal, theres always a way to make something new work.

I don't want to be just a 6ft diver rest of my life. I need more, If I can make something that I can go at least 20ft then that will be great. This is part of my dream, to make a lifesupport system. And to make the equipment to help other handicapped people.

My current dive system needs a lot of work I can't go deeper then 6ft and if I do the pressure on the vent increases a lot.

I think with everybodys help we can make anything happen, we have many many specialist who want to help. It might take a couple of years to do it but I think it's worth the effort to try. It may take a lot of money but I don't like to say I can't do something when I know I can.

Diving is my life I have to do what I can to dive.

Well we can talk more about it some other day.

Take care my friend, Matt

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