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silent running · 14th May 2008, 19:10

Quote: (Originally Posted by DeepBlueInnovation)

Just to resurrect an old thread, why not manufacture adapters like the nato pod uses? that way it is easy to manufacture the one bov and just make a range of adaptors. In the last photo in this link you can see the Inspo ones screwed on. Andy if you like the BOV it wouldn't be hard to get someone with good lathe skills to machine one up.

Cheers,

Ben.

Hi Ben, just got back from another trouble free 50 hrs of Prism diving in Indo. If I understand correctly, are you suggesting making adapters for the Pelagian BOV? I'm not sure about the way the BOV is constructed and if this could be done without adding a significant amount of bulk to the BOV who's appeal is partly it's small size.

But your mentioning the NATO pod brings up other points I have to consider. I recently saw a NATO FFM with the BOV/OC setup that Peter Readey brought with him to the BTS show in March. While the OC reg used on it is not a very good one, it is at least in the optimal low profile and decent breathing position-45 degrees from the diver's mouth axis. This is the only way I can think of to get a BOV that will be closest to having the same WOB as a regular OC 2nd stage, while still having a low profile. None of the current BOV's orient their 2nd stages this way: They are either mounted underneath the barrel, which can't be good for WOB in OC mode or on the front, sticking out into the breeze like a weather vane and a liability in any real current. The front mounted 2nd stages also have free flow potential and will require a shutoff, which doesn't make switching from CC to OC any easier and which is part of the appeal of a BOV.

My feeling at this point is that until somebody comes out with a BOV that orients the 2nd stage closer to a 45 degree angle, I won't try one again as there's too many drawbacks in terms of OC performance, size and additional complexity. After spending this last trip diving in even more heavy current than usual, I can't imagine having anything even slightly more bulky sticking out in front of my mouth. Nor after all that hard work, do I want to compromise any of the ease of breathing on the Prism DSV... -Andy

14th May 2008, 19:10	#9 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,836	Re: Prism and Drager flapper valves... Quote: (Originally Posted by DeepBlueInnovation) Just to resurrect an old thread, why not manufacture adapters like the nato pod uses? that way it is easy to manufacture the one bov and just make a range of adaptors. In the last photo in this link you can see the Inspo ones screwed on. Andy if you like the BOV it wouldn't be hard to get someone with good lathe skills to machine one up. Cheers, Ben. Hi Ben, just got back from another trouble free 50 hrs of Prism diving in Indo. If I understand correctly, are you suggesting making adapters for the Pelagian BOV? I'm not sure about the way the BOV is constructed and if this could be done without adding a significant amount of bulk to the BOV who's appeal is partly it's small size. But your mentioning the NATO pod brings up other points I have to consider. I recently saw a NATO FFM with the BOV/OC setup that Peter Readey brought with him to the BTS show in March. While the OC reg used on it is not a very good one, it is at least in the optimal low profile and decent breathing position-45 degrees from the diver's mouth axis. This is the only way I can think of to get a BOV that will be closest to having the same WOB as a regular OC 2nd stage, while still having a low profile. None of the current BOV's orient their 2nd stages this way: They are either mounted underneath the barrel, which can't be good for WOB in OC mode or on the front, sticking out into the breeze like a weather vane and a liability in any real current. The front mounted 2nd stages also have free flow potential and will require a shutoff, which doesn't make switching from CC to OC any easier and which is part of the appeal of a BOV. My feeling at this point is that until somebody comes out with a BOV that orients the 2nd stage closer to a 45 degree angle, I won't try one again as there's too many drawbacks in terms of OC performance, size and additional complexity. After spending this last trip diving in even more heavy current than usual, I can't imagine having anything even slightly more bulky sticking out in front of my mouth. Nor after all that hard work, do I want to compromise any of the ease of breathing on the Prism DSV... -Andy
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