Dual Loop BOV

decoweenie · 26th March 2007, 09:27

Quote: (Originally Posted by HelenM)

...i.e if your mouthpiece failed you are a bit screwed. Or am I missing something?

No, I am interested in the same as it is an excellent question IMHO.

Just FYI, I remember that GI used to have a spare mouthpiece + small zip tie in his suit pocket for the push dives. I used to carry the same on deeper dives until I had a couple mouthpiece tears and still able to hold it in place for the remaining of the dives.

Andy M · 26th March 2007, 10:38

Quote: (Originally Posted by vidodivr)

That's Hot!!

Does that huge thing come with free dental treatment? Looks big enough to do some damage to ones teeth and jaw in a current or when scootering. Is there an option for support brackets. Seems it would be better fitted to a FFM.

Nice idea by the way.

Andy

Mdemon · 26th March 2007, 10:54

Smaller reg for a start. Combine BOVs into one unit where the central cylinder switches between loops and OC - the bore can be less when smooth so you can sweep back the convoluted hose away from the BOV itself enabling a smaller central cylinder.

I'm not sure I'd do it though. All your eggs in one basket? If the lever drops off, the BOV case becomes cracked and falls apart (as happened to my old instructor), the mouthpiece comes away or the cylinder jams, you might be in a difficult situation.

On the other hand, it would be very convenient being able to switch easily from Loop 1 (to OC) to Loop 2...

Quote: (Originally Posted by decoweenie)

How ?

It won't be that easy since there are some physical space limitation of the hardware required to provide access to 2 closed loops and 1 OC.

Who has a pic of Olivier Isler's dual-loop DSV for size comparison ?

***jradomski*** · 26th March 2007, 12:24

Quote: (Originally Posted by Mdemon)

No, that's huge!

Good effort, but it needs to be smaller.

If you want a dual loop BOV thats smaller, Divematics has one (not on website you have to speak to him).. Its sigificantly smaller because its strictly a dual loop no OC reg...

Drmike · 26th March 2007, 13:06

Quote: (Originally Posted by Mdemon)

No, that's huge!

Good effort, but it needs to be smaller.

if you think thats big - your going to hate mine

decoweenie · 26th March 2007, 13:39

Quote: (Originally Posted by Drmike)

if you think thats big - your going to hate mine

I vaguely remember hearing that when we hung out at Orchard Tower last time...

onetime · 26th March 2007, 16:52

Quote: (Originally Posted by decoweenie)

How ?

It won't be that easy since there are some physical space limitation of the hardware required to provide access to 2 closed loops and 1 OC.

Who has a pic of Olivier Isler's dual-loop DSV for size comparison ?

May not be easy but I think it can be done. I've got some ideas but no CAD skills.

Two blocks strapped on top of each other with side exiting hoses works, obviously, but having a central chamber with 2 hoses running at a downward angle kind of following the jawline and two coming in from the sides would take less room. Of course that means a different isolation switch needs to be worked up but with some work it can be done.

Or, how about an inhalation hose run inside an exhaltion hose on either side rather than two inhales on one side and two exhales on the other? Of course that will take some design work on the scrubber and a replacement for the typical mushroom valves.

There are always options for revision but I think this is an interesting development as is. Can't get to the finish without taking the first step.

--Paul

johnv · 26th March 2007, 17:53

Quote: (Originally Posted by HelenM)

would it concern you that there was a common failure point - i.e if your mouthpiece failed you are a bit screwed. Or am I missing something?

Absolutely - I'd not even consider a combined system - but then I woudn't use a manifold on tanks either and that's now accepted practice in many circles.

regards,
John

jmhardingjr · 26th March 2007, 18:35

Quote: (Originally Posted by decoweenie)

I vaguely remember hearing that when we hung out at Orchard Tower last time...

Ahh, the "Four floors of ####es". The nostalgia brings a little tear to the eye . . .

lof · 27th March 2007, 02:15

Quote: (Originally Posted by decoweenie)

Very nice Jakub!

The HUD for the bail-out CCR could be mounted directly and parallel to the BOV selector switch on the primary CCR, so when you close the primary loop (i.e. selector goes vertical), the HUD pops in place.

Mount the HUD for the primary 90-deg clockwise from the same location, and it will pop away with the same movement.

Then there is no mistake as to which HUD belongs to which loop/CCR.

Thanks guys. I've never had problems with the size

Exactly Phi, the HUDs can be mounted ON the Selector switch.

Quote:

Smaller reg for a start. Combine BOVs into one unit where the central cylinder switches between loops and OC - the bore can be less when smooth so you can sweep back the convoluted hose away from the BOV itself enabling a smaller central cylinder.

any reg can be mounted on it, or the OC reg can be removed and opening blanked for just CC operation.
It is a modular system, so it can also be broken apart into two independent BOVs as well. Configure it for your mission requirements.
We will improve it. This is the best we could do in 3-4 weeks before the show.

26th March 2007, 09:27	#11 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: Dual Loop BOV Quote: (Originally Posted by HelenM) ...i.e if your mouthpiece failed you are a bit screwed. Or am I missing something? No, I am interested in the same as it is an excellent question IMHO. Just FYI, I remember that GI used to have a spare mouthpiece + small zip tie in his suit pocket for the push dives. I used to carry the same on deeper dives until I had a couple mouthpiece tears and still able to hold it in place for the remaining of the dives. __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
(Offline)

26th March 2007, 10:38	#12 (permalink)
Andy M Dude Current Rebreather/s: Home Build Other Rebreather/s: Sport Kiss Home Build Join Date: Mar 2005 Location: Cambridge, UK Posts: 415	Re: Dual Loop BOV Quote: (Originally Posted by vidodivr) That's Hot!! Does that huge thing come with free dental treatment? Looks big enough to do some damage to ones teeth and jaw in a current or when scootering. Is there an option for support brackets. Seems it would be better fitted to a FFM. Nice idea by the way. Andy __________________ Know your PO2 at all times
(Offline)

26th March 2007, 10:54	#13 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,906	Re: Dual Loop BOV Smaller reg for a start. Combine BOVs into one unit where the central cylinder switches between loops and OC - the bore can be less when smooth so you can sweep back the convoluted hose away from the BOV itself enabling a smaller central cylinder. I'm not sure I'd do it though. All your eggs in one basket? If the lever drops off, the BOV case becomes cracked and falls apart (as happened to my old instructor), the mouthpiece comes away or the cylinder jams, you might be in a difficult situation. On the other hand, it would be very convenient being able to switch easily from Loop 1 (to OC) to Loop 2... Quote: (Originally Posted by decoweenie) How ? It won't be that easy since there are some physical space limitation of the hardware required to provide access to 2 closed loops and 1 OC. Who has a pic of Olivier Isler's dual-loop DSV for size comparison ?
(Offline)

26th March 2007, 12:24	#14 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Home Build Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Home Build Join Date: Mar 2005 Location: "Da" Bronx Posts: 2,900	Re: Dual Loop BOV Quote: (Originally Posted by Mdemon) No, that's huge! Good effort, but it needs to be smaller. If you want a dual loop BOV thats smaller, Divematics has one (not on website you have to speak to him).. Its sigificantly smaller because its strictly a dual loop no OC reg... __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.
(Online)

26th March 2007, 13:06	#15 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,165	Re: Dual Loop BOV Quote: (Originally Posted by Mdemon) No, that's huge! Good effort, but it needs to be smaller. if you think thats big - your going to hate mine __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
(Offline)

26th March 2007, 13:39	#16 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: Dual Loop BOV Quote: (Originally Posted by Drmike) if you think thats big - your going to hate mine I vaguely remember hearing that when we hung out at Orchard Tower last time... __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
(Offline)

26th March 2007, 16:52	#17 (permalink)
onetime Classic KISSer #138 Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Mar 2005 Location: US, NJ Posts: 673	Re: Dual Loop BOV Quote: (Originally Posted by decoweenie) How ? It won't be that easy since there are some physical space limitation of the hardware required to provide access to 2 closed loops and 1 OC. Who has a pic of Olivier Isler's dual-loop DSV for size comparison ? May not be easy but I think it can be done. I've got some ideas but no CAD skills. Two blocks strapped on top of each other with side exiting hoses works, obviously, but having a central chamber with 2 hoses running at a downward angle kind of following the jawline and two coming in from the sides would take less room. Of course that means a different isolation switch needs to be worked up but with some work it can be done. Or, how about an inhalation hose run inside an exhaltion hose on either side rather than two inhales on one side and two exhales on the other? Of course that will take some design work on the scrubber and a replacement for the typical mushroom valves. There are always options for revision but I think this is an interesting development as is. Can't get to the finish without taking the first step. --Paul
(Online)

26th March 2007, 17:53	#18 (permalink)
johnv Custom Title Allowed! Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Dec 2005 Location: UK Posts: 133	Re: Dual Loop BOV Quote: (Originally Posted by HelenM) would it concern you that there was a common failure point - i.e if your mouthpiece failed you are a bit screwed. Or am I missing something? Absolutely - I'd not even consider a combined system - but then I woudn't use a manifold on tanks either and that's now accepted practice in many circles. regards, John
(Online)

26th March 2007, 18:35	#19 (permalink)
jmhardingjr Son of a Sailor Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Sep 2005 Location: . . . this one particular harbor . . . Posts: 196	Re: Dual Loop BOV Quote: (Originally Posted by decoweenie) I vaguely remember hearing that when we hung out at Orchard Tower last time... Ahh, the "Four floors of ####es". The nostalgia brings a little tear to the eye . . . __________________ ". . . the sea's in my veins, my tradition remains, I'm just glad I don't live in a trailer . . ."
(Offline)

27th March 2007, 02:15	#20 (permalink)
lof RebreatherWorld Sponsor Current Rebreather/s: Megalodon Prism Topaz Sport Kiss Classic Kiss MK 15.X Other CCR RB80 / Clone Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Other SCR Home Build Join Date: Jun 2005 Location: USA Posts: 479	Re: Dual Loop BOV Quote: (Originally Posted by decoweenie) Very nice Jakub! The HUD for the bail-out CCR could be mounted directly and parallel to the BOV selector switch on the primary CCR, so when you close the primary loop (i.e. selector goes vertical), the HUD pops in place. Mount the HUD for the primary 90-deg clockwise from the same location, and it will pop away with the same movement. Then there is no mistake as to which HUD belongs to which loop/CCR. Thanks guys. I've never had problems with the size Exactly Phi, the HUDs can be mounted ON the Selector switch. Quote: Smaller reg for a start. Combine BOVs into one unit where the central cylinder switches between loops and OC - the bore can be less when smooth so you can sweep back the convoluted hose away from the BOV itself enabling a smaller central cylinder. any reg can be mounted on it, or the OC reg can be removed and opening blanked for just CC operation. It is a modular system, so it can also be broken apart into two independent BOVs as well. Configure it for your mission requirements. We will improve it. This is the best we could do in 3-4 weeks before the show. __________________ Jakub Golem Gear ShopKeeper www.golemgear.com
(Offline)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode