Comprehensive list of all accidents

Drmike

Hey dude,

Have you seen the paper

"Comprehensive performance limits for divers UW breathing gear, Consequences for adopting diver focused limits" NEDU


Rubicon Research Repository: Item 123456789/4984


Makes for an interesting read as they are talking about setting a new more realistic performance goal whereby the limit reduces with increased depth rather than be a fixed limit (which penalises at shallow depths and benefits at higher depths)

Attached Images

	mk16rev.JPG (143.4 KB, 13 views)
	mk16wobprone.JPG (49.8 KB, 571 views)

__________________
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

silent running

Thanks for digging out the data Mike. Makes sense to lower the allowable WOB requirement as depth increases rather than have one standard for all depths. And with this slope, I guess one could plot a desirable WOB at depths beyond where the chart ends and add this variable to determining a best dil mix and equivalent air density.

At 198fsw and 62.5 RMV the Prism managed 1.622 J/L with air dil in prone position and would exceed the new standard-if I'm understanding all the NEDU charts correctly.

Brad_Horn

Mike,

I note that study was done on N202 (Air/Nitrox Dil), it is interesting how it ties in with regard to a ~30m depth limit, with Gavin Anthony's presentation at DAN in Jan 08 even though NEDU was looking at WOB and Qiniteq End-tidal Co2. DAN Divers Alert Network {Approx Min 26:00}

Would be interesting to compare those NEDU results with the diluent in the Mk16 Mod1 being Heliox (10/90, 16/86, 20/80 etc) instead of N202.

Thanks for the link

regards
Brad

AD_ward9

It varies considerably depending on the rebreather. The worst case multiplier we have measured was 2.8, and the best case 7 times. It depends very much on the flow type that predominates. For a well designed rebreather like the Mark 16, I would expect a number around 6.5, so the depth limit for heliox is 6.5 times that for nitrox, for the same breathing resistance and WOB limits.

Just on the independent testing of rebreathers, we are publishing the results in a couple of weeks (including Meg, Boris, Dolphin, Inspo and DL single and double rebreather units). We are trying to arrange things to include the rEvo that Paul Raymaekers has very kindly offered to bring over, but it is coinciding with a move of our facility from a building to a new container with power,water and drainage that we are having fitted out just as a lab after Fire and Factory Inspector concerns over the amount of O2, pressure vessels etc we have in a building - it has been a battle for about 2 years. We would like to do an update later in the year to this report, and include the rEvo, RB80, PRISM and Mark 16. Anyone able to offer a loan of a PRISM or RB80 in Europe, please let me know. We will cover shipping costs.

Alex

havskatt

Hi,This is a huge thread. And I cannot find the list, that I guess must be stored somewhere.Can you help me to find it? Many thanks indeedS

gtzavelas

http://www.deeplife.co.uk/or_files/R...lic_080520.xls

Doppler

Not working

PacketSniffer

This should do it. The spreadsheet was updated and so the filename was changed because of the date.

Link

__________________


Far better it is to dare mighty things, to win glorious triumphs, even though checked by failure, than to take rank with those poor spirits who neither enjoy much nor suffer much, because they live in the gray twilight that knows not victory or defeat.

Doppler

Thanks