Colkan Eagle

caveseeker7

Actually, not bad questions.

What are the (preliminary) specs of the Eagle?
- physical size
- weight (empty/no tanks and ready to dive with sorb and gas)
- scrubber size, duration and parameters the duration is based on

The Biopacks, if memory serves me right, where surface rebreathers.
Scrubber duration under pressure and thermally more taxing water
shouldn't be the same as on the surface. .chin:

Since the canister looks very CCR1000, does it also fill/empty through
a small, inconvinient hole one the side?

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Cheers
Stefan



"Political Correctness is a doctrine, fostered by a delusional, illogical minority,
and rabidly promoted by an unscrupulous mainstream media,
which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.!"

Dave Sutton

I'll answer what I know... Steve/Jason can do the rest when they check in:

Scrubbers are top loading a-la Mark-15.5/Mark-16.


This rig uses the exact same electronics, primary display, and secondary as my Mark-15, so:

Primary is the HUD. Secondary has the 3 PP02's dislayed.

Primary can be replaced by the Mark-15 style Primary if preferred.



I'm really looking forward to seeing one of these.

Dave

__________________
"Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com

Dave Sutton

But there *is* a worst.... it's the one you don't own (yet).....


Dave

__________________
"Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com

RonMicjan

Thanks for the support here, I was feeling a bit unloved

My polite, tough, question, "is there a way to turn the B/L on without breaking open the case" was responded by "Dont you carry a torch?" which was a chicken $hit answer, so I responded with "thats Lame" The rest of my questions were quite polite and Colin and I shook hands after the crowds left and none the worse for wear. Give me a break here guys, how about taking a look at my website where I tear down, write about, praise and condem bits and peices of no less than 12 rebreathers, the only way I can do this is to ask the right bleeding questions. As evidenced by the 33,000+ hits on said website, someone or two folks are looking at the data I collect. Tough $hit if some folks dont like that I point out some deficiencies in new (or rebuilt, refurbished, new to market) equipment. The flak I am taking here is bollocks, you dont like my critique, dont read it, go buy the thing and discover for yourself how some things suck that sounded good by the salesman.

Yes, I have used the KISS displays, didnt like them either, ran with BL on all the time and had to change batteries a lot, and the displays flooded occasionally too. Gee maybe this is why jetsam is now fitting thier CCR's with electronics from Delta P for PO2 monitoring and why Kim Smith told me, "I have had so many folks tell me that they would buy the CK again for any price, but would you please do something about the displays" The reason, BL controls INSIDE the display, duh, guys, quit making EXCUSES for a POOR design, ITS A POOR DESIGN! Scream about it and maybe some engineers will find a better way.

I also asked Paul Raemaekers some tough questions (HUD design) about the rEvo and no one is getting out of joint about that...

As for schrader valves, the Meg ADV uses a schrader valve to flow diluent into the loop and at 135psi IP, it blows the whole loop up in 2 seconds, I assume that the schrader valve in the manual add valves in this unit are smaller in diameter so flow less, but there is no way the schrader valve outlet is a sonic orifice, sonic orifices require a particular shape to achive sonic flow, Maybe there is an orifce of some type in the flow path (besides the KISS type orfice on that particular model) but it wasnt mentioned. Could someone with one of these units put a flow meter on the outlet of the Oxygen add button and measure the flow with 135 (10bar) PSi behind it and then again with 3000 (200bar) so we can have the real skinny, not just Dave's assurances that it will be OK. I do respect Dave for his vast knowledge, but I believe he is wrong here.
There needs to be some sort of alert here for the diver to know the Reg seat has failed and they can act accordingly. If the OPV pops on my O2 reg, I can do a shutdown and modulate the valve to end the dive. This is not total condemnation of the Eagle CCR, just something that needs to be addressed.

Yikes you guys, maybe a few others need a holiday to Australia.

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marekm

Hi guys,

I have just done an experiment to determine the flow rate really slows to a trickle if a snubber is used. Here are the results:

Test 1: Used a Scubapro MK10 with IP set to 8bar connected to a scuba tank with 150bar of air. Attached a 40 micron porus disc snubber to the end of LP hose. From the snubber I attached a tube to a 20L gas sampling bag that was completely deflated. Opened the valve and timed how long it took to fill 20L of air into the bag.

Test 2: Used a yoke fitting connected to a scuba tank with 150bar of air and connected the 40 micron snubber directly to the yoke fitting. Again, the deflated 20L bag was connected to a tube leading to the snubber. Opened the tank valve and timed how long it took to fill the bag.

For test 1, it took 17 seconds to fill the bag, translating to a flow rate of 70 L per minute (enough flow to flush my 4L counterlungs with O2 in ~4 seconds).

For test 2, (which simulates a immediate and total HP seat failure in the oxygen regulator) it took 10 seconds to fill the bag, which translates to a flow rate of 120L per minute. This flow rate is only 70% greater than the normal flowrate, even though supply pressure has increased about 19 fold.

The conclusion from this is that a snubber will prevent a torrent of O2 from occuring if the O2 regulator fails. Secondly, the working flowrate will be acceptable as well, and not a trickle. Finally, using different size snubbers allows these flowrates to be fine tuned. I used the 40 micron one as it was laying about.

Now, to get that schrader valve and test if what Dave said is correct...(again)...

acanthaster

Ahh.. so the HUD is on both the mCCR and eCCR, thanks for clearing that up.

SteveL

Mate,

The primary display is currently a red/green HUD but comming soon (by popular demand) is a mini MK15.x primary with multiple LEDs to show hight and low of setpoint and alarms (check out Mk 15 threads for pics on the full size one)

The scrubber is about 2.5kg although to be honest we havent actually weighed it specifically - only to say that it has the same dimensions as a BP 240 which has been thouroughly tested at 4 hours. Working on volumes the bigger scrubber will have roughly the same sorb space as a Mk15 - so you could ecpext 7 - 8 hours in 18 degree water or there abouts - maybe longer in warm water -

If you look at a Mk scrubber it has a big hole in the middle to accomodate the sensors - the eagle doesnt have this so a lot more sorb can be packed in the donut.

As for decisions made in haste.......

Steve

SteveL

But Im sure we could scratch your name on one...........

S

acanthaster

Cheers for the info. I didn't actually commit to anything on the weekend, just disappointed I didn't give the eagle a better look at the time. I'm sure I will have plenty of opportunity to do so in the future though.

jmhardingjr

Nice work, Marek. I was anticipating you using a single orifice snubber. But the use of the porous disc seemed to do exactly what you wanted it to. Seems to be a simple little bit of insurance against a worst case HP seat failure. Although, if what everyone is saying about Schrader valves is right, the Eagle likely won't need it.

Do you have a little Frankenstein's laboratory in your house?

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". . . the sea's in my veins, my tradition remains, I'm just glad I don't live in a trailer . . ."