80% jet for dolphin

stegri5 · 21st June 2007, 22:21

ok we all know that drager dont sell jets at 80% for the dophin(right).but i want one so is there anybody who knows where i can have one made up .the reason i would like one is that im going to put a second 1st stage on to the loop and put 80% through for deco .can this be done without killing myself.(i did think about the 100% jet but maybe not) steve

**wedivebc** · 22nd June 2007, 02:42

Quote: (Originally Posted by stegri5)

ok we all know that drager dont sell jets at 80% for the dophin(right).but i want one so is there anybody who knows where i can have one made up .the reason i would like one is that im going to put a second 1st stage on to the loop and put 80% through for deco .can this be done without killing myself.(i did think about the 100% jet but maybe not) steve

Why not just use the 60% orifice with 80%mix? You'll get more O2 in the loop that way

**Freef** · 22nd June 2007, 13:51

Seconded. You need to look at your vO2 and match that to a flow rate and gas choice. Odin used high O2 through a jet for his deco dolphin.

Have a look at the attached spreadsheet which calculates loop fO2 from cyl fO2 and jet sizes.

83% through the 60% jet should get you 80% in the loop with a vO2 of 1.

Fitting a T piece so that your bypass can still operate would be a good idea [see Tecme] as well so you can loop flush as soon as you hit 9m and get straight onto the deco gas.

The 80% jet wouldn't actually supply a loop fO2 of 80% anyway, as the slower flow rate would mean that you recycled the gas more often than on a higher flow rate.

stegri5 · 22nd June 2007, 17:09

Quote: (Originally Posted by Freef)

Seconded. You need to look at your vO2 and match that to a flow rate and gas choice. Odin used high O2 through a jet for his deco dolphin.

Have a look at the attached spreadsheet which calculates loop fO2 from cyl fO2 and jet sizes.

83% through the 60% jet should get you 80% in the loop with a vO2 of 1.

Fitting a T piece so that your bypass can still operate would be a good idea [see Tecme] as well so you can loop flush as soon as you hit 9m and get straight onto the deco gas.

The 80% jet wouldn't actually supply a loop fO2 of 80% anyway, as the slower flow rate would mean that you recycled the gas more often than on a higher flow rate.

i was looking at that david this is why i need to have a chat with u some time thanks steve

**Freef** · 23rd June 2007, 19:29

Quote: (Originally Posted by stegri5)

i was looking at that david this is why i need to have a chat with u some time thanks steve

PM sent, I was trying to figure out who the mystery emailer was!

21st June 2007, 22:21	#1 (permalink)
stegri5 New Member Current Rebreather/s: Dolphin Home Build Other Rebreather/s: Not Bought Yet Dolphin Home Build Join Date: Mar 2007 Location: france rennes Posts: 88	80% jet for dolphin ok we all know that drager dont sell jets at 80% for the dophin(right).but i want one so is there anybody who knows where i can have one made up .the reason i would like one is that im going to put a second 1st stage on to the loop and put 80% through for deco .can this be done without killing myself.(i did think about the 100% jet but maybe not) steve
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22nd June 2007, 02:42	#2 (permalink)
wedivebc Dave Tomblin Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,447	Re: 80% jet for dolphin Quote: (Originally Posted by stegri5) ok we all know that drager dont sell jets at 80% for the dophin(right).but i want one so is there anybody who knows where i can have one made up .the reason i would like one is that im going to put a second 1st stage on to the loop and put 80% through for deco .can this be done without killing myself.(i did think about the 100% jet but maybe not) steve Why not just use the 60% orifice with 80%mix? You'll get more O2 in the loop that way __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
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22nd June 2007, 17:09	#4 (permalink)
stegri5 New Member Current Rebreather/s: Dolphin Home Build Other Rebreather/s: Not Bought Yet Dolphin Home Build Join Date: Mar 2007 Location: france rennes Posts: 88	Re: 80% jet for dolphin Quote: (Originally Posted by Freef) Seconded. You need to look at your vO2 and match that to a flow rate and gas choice. Odin used high O2 through a jet for his deco dolphin. Have a look at the attached spreadsheet which calculates loop fO2 from cyl fO2 and jet sizes. 83% through the 60% jet should get you 80% in the loop with a vO2 of 1. Fitting a T piece so that your bypass can still operate would be a good idea [see Tecme] as well so you can loop flush as soon as you hit 9m and get straight onto the deco gas. The 80% jet wouldn't actually supply a loop fO2 of 80% anyway, as the slower flow rate would mean that you recycled the gas more often than on a higher flow rate. i was looking at that david this is why i need to have a chat with u some time thanks steve
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23rd June 2007, 19:29	#5 (permalink)
Freef Custom Title Disallowed! Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Jan 2006 Location: Land of the Freef, UK. Posts: 1,356	Re: 80% jet for dolphin Quote: (Originally Posted by stegri5) i was looking at that david this is why i need to have a chat with u some time thanks steve PM sent, I was trying to figure out who the mystery emailer was! __________________ David. Currently owner of two differently sized ankles.
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