YBOD cylinders and prism cowling...

silent running · 27th August 2005, 08:12

Hey fellas, has anybody tried using YBOD cylinders(Faber steel 20's)on a Prism with the cowling? This would give me the option of not bringing my al 19's and then prevent the big hassel of airtravel with cylinders. The YBOD 20s are slightly longer and thinner than our al 19s and I know the cover is designed to rest on the cylinders. I wonder if using the YBOD cyl would cause the cover to rest on the scrubber or the head, which would probably not be good...Andy

TechBlue · 27th August 2005, 15:35

Quote: (Originally Posted by silent running)

Hey fellas, has anybody tried using YBOD cylinders(Faber steel 20's)on a Prism with the cowling? This would give me the option of not bringing my al 19's and then prevent the big hassel of airtravel with cylinders. The YBOD 20s are slightly longer and thinner than our al 19s and I know the cover is designed to rest on the cylinders. I wonder if using the YBOD cyl would cause the cover to rest on the scrubber or the head, which would probably not be good...Andy

Andy
What kind of dives are you planning on doing do you need the cowling at all? This would simplify life and you could then use any bottles available.

silent running · 28th August 2005, 01:38

Hi Chris, I like my cowling for the slip and fall/small boat knocking about protection and for poking around wrecks. I dove without one for a year before getting it. I probably won't be doing any wreck diving where I'm going in the Philippines. I'm just wondering if it's an option as I will be diving with a guy who has a YBOB and may have extra cylinders.-Andy

apitkin · 21st October 2005, 01:54

Hi Andy.

I've used Faber 3 litre steel cylinders with my Prism in the UK. You can get them under the cowling. However, they are a bit thinner and a bit longer than the standard 19s that come with the unit.

I had to modify my cowling slightly by cutting a small strip off the bottom (where it sort of folds under) to clear the valve necks. The cowling bottom edge then rests on the valve necks. It's not such a snug fit on the cylinders, but with the bungy it works fine.

The other (bigger) snag is that to make this work you'll need to lengthen the LP O2 hose to the solenoid, otherwise the O2 cylinder cannot be brought down low enough on the backplate to get inside the cowling along with the scrubber canister. You need about 3" extra. What I did was to make up a brass extension piece with a 3/8 UNF male on one end and a female on the other - easy if you have a lathe or know anyone who has. That way I can go back to the 19s any time (if travelling for example).

Andy (the other one)

silent running · 21st October 2005, 04:19

Hello Andy. thanks for the detailed reply. It's good to know that I would need an extension for the braided O2 line, very helpful. Thanks again-USAndy

27th August 2005, 08:12	#1 (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	YBOD cylinders and prism cowling... Hey fellas, has anybody tried using YBOD cylinders(Faber steel 20's)on a Prism with the cowling? This would give me the option of not bringing my al 19's and then prevent the big hassel of airtravel with cylinders. The YBOD 20s are slightly longer and thinner than our al 19s and I know the cover is designed to rest on the cylinders. I wonder if using the YBOD cyl would cause the cover to rest on the scrubber or the head, which would probably not be good...Andy
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27th August 2005, 15:35	#2 (permalink)
TechBlue RebreatherWorld Sponsor Current Rebreather/s: Inspiration Classic Classic Kiss Other CCR Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Optima Other CCR Join Date: Apr 2005 Location: Costa del Sol, Spain Posts: 212	Quote: (Originally Posted by silent running) Hey fellas, has anybody tried using YBOD cylinders(Faber steel 20's)on a Prism with the cowling? This would give me the option of not bringing my al 19's and then prevent the big hassel of airtravel with cylinders. The YBOD 20s are slightly longer and thinner than our al 19s and I know the cover is designed to rest on the cylinders. I wonder if using the YBOD cyl would cause the cover to rest on the scrubber or the head, which would probably not be good...Andy Andy What kind of dives are you planning on doing do you need the cowling at all? This would simplify life and you could then use any bottles available. __________________ Cheers, Chris www.tech-blue.com The site dedicated to Rebreather and Technical diving "We only sell what we dive"
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28th August 2005, 01:38	#3 (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	Hi Chris, I like my cowling for the slip and fall/small boat knocking about protection and for poking around wrecks. I dove without one for a year before getting it. I probably won't be doing any wreck diving where I'm going in the Philippines. I'm just wondering if it's an option as I will be diving with a guy who has a YBOB and may have extra cylinders.-Andy
(Offline)

21st October 2005, 01:54	#4 (permalink)
apitkin New Member Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Cloud Cuckoo Land Posts: 102	Cowling Hi Andy. I've used Faber 3 litre steel cylinders with my Prism in the UK. You can get them under the cowling. However, they are a bit thinner and a bit longer than the standard 19s that come with the unit. I had to modify my cowling slightly by cutting a small strip off the bottom (where it sort of folds under) to clear the valve necks. The cowling bottom edge then rests on the valve necks. It's not such a snug fit on the cylinders, but with the bungy it works fine. The other (bigger) snag is that to make this work you'll need to lengthen the LP O2 hose to the solenoid, otherwise the O2 cylinder cannot be brought down low enough on the backplate to get inside the cowling along with the scrubber canister. You need about 3" extra. What I did was to make up a brass extension piece with a 3/8 UNF male on one end and a female on the other - easy if you have a lathe or know anyone who has. That way I can go back to the 19s any time (if travelling for example). Andy (the other one)
(Offline)

21st October 2005, 04:19	#5 (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	Hello Andy. thanks for the detailed reply. It's good to know that I would need an extension for the braided O2 line, very helpful. Thanks again-USAndy
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