New Neptune aCCR

[jale]

T

I didn’t use the submatix conversion, I came across it by chance while looking into modifying a kiss sidewinder
It is very similar to the conversions that TecMe does (for other projects; eg. solid state sensors):
A canister to carry the extra components + breakout cables back and forth

All I could find online about it was this brief product page, so I kinda stopped looking into it (for now, till you posted this thread)

GEM - gas electronic modul

www.submatix.com

In the Neptune FB video they briefly showed it, it was sitting more or less at hip level

My assumption is, as @grantmac said, that the solenoid sit downstream from the leaky valve, kinda acting as a „MAV“ button

2nd guess: that splits into 2 routes
- MAV for mccr mode
- 2nd solenoid (?) for eccr mode

I’ll ask about all that down at boot next week and keep y’all posted (unless they put out some public info/spec sheets)

Thanks for the details.
Indeed, on the video we can see a "black tube" which looks like the Submatix system you posted.
Do you know if with this system you still need a blocked first stage?
Anyways it looks to me as a solution to non-existent problems but on the video he mentions something like answering a request from the military. Don't know.
Let's wait and see

 

[Mobulai]

Do you know if with this system you still need a blocked first stage?

Oh straight to the hard questions

I have been thinking about this for a few months actually, and have no real answer to it

My guess (as an engineer not as a diver so no consideration for system integrity within certification context) is no, solenoids don’t need constant absolute IP

In theory, submatix use needle valves in their mavs so it’s inline with the idea of no blocked stages needed

But they (submatix) market it for leaky valve based rebreathers

In theory also, a blocked 1st is only there on a kiss (for eg.) to maintain sonic flow

I’d say it all comes down to what ranges of depth you’d plan to use it at

Case 1:
- blocked 1st stage > kiss orifice > solenoid

You wanna use it within the 90~110m range but as an eccr

Case2:
- normal 1st > orifice > solenoid

You don’t care about the „metabolic base“ variance (constant volume not mass as long as operational pressure ratio is maintained), and wanna use it beyond 100m

Case 3:
-normal 1st > solenoid

You wanna use it like a JJ, Meg or Xccr; like case 2, you don’t want any o2 injections to come form any source except from solenoid firing (high battery load, least unlikely to make sense as a conversion)

I am approaching the limit of comprehension on my side here (as a noob mod1 diver and not working in the dive industry (yet, who knows)) so I might start getting things wrong
Anyone reading this, lots of grains of salt, and feel free to educate me further/shoot down my mistakes


Edit:
The „need“ is a matter of contingency; kinda like when a car engine senses bad firing sequence, or faulty gas pedal sensor would put you in „safe mode“ (capping the max torque…)
And this is up to the system designers/safety assessors to decide

In theory, you can ride a hot rod engine on 2 wheels, but safe it aint

 

[flymolo]

you had me at "electronic black box".

 

[Mobulai]

Keen to know the answer if just monitor or controller. Look forward seeing your response. Please keep us updated....thx

They’re not at Boot

 

[jale]

But

They’re not at Boot

But you have a SW used as a CM. Any info?! Thanks

 

[Mobulai]

But

But you have a SW used as a CM. Any info?! Thanks

Yes, I was there when they were still pre-vacuuming the floor

Here’s the latest from boot, they’re making a CM counterlung as well, the claim is it’s for a mil request
Seems like a ~2L CL
View attachment 879417

There wasn’t much info about that they shared
In their words “we whipped it together in a day and a half, as a military request; simply made a CL for it and that was simple enough; obviously smaller as there’s no “dead space” like the BMCL”
——
Edit: they also said that they haven’t made loop hoses that have the right length for it yet
——
My guess is this is their reply to the GO or just to market the modularity of the unit
They were most excited about the BM version actually, wven more than the SM version (means selling more wings)

 

[InWay2Deep]

They were most excited about the BM version actually, wven more than the SM version (means selling more wings)

This has been my concern this entire time. It's a SIDEWINDER yet all the pics/demos I see of it are in the Back Mount configuration, I mean that's cool and all, but SIDEwinder!