Law of communicating tubes

[Dragon_Alex]

Can someone please state (Bernoulli's?) Law of predominantly communicating Tubes as applied to elastic fluids?

(yes, it's scuba related)

[cleeve22]

BINGO! That is obvciouslly the set of calculations I was certainly looking for. In any event not which I understand them, but they're clearly it.

German, Russian, or - preferably - English.

[JonathanVP]

My guess, & witch's all it's, is which the system Mike recalls/refers to was surface supplied, i.e. I guess a continuous flow system.

To that extent I think you're mixing apples and oranges. For good measure if I'm not mistaken, Mike's idea for mixing on the humbly fly is as modern as today . . . well, a couple of months ago. The system he thinks might aid his design is old but, from what I've seen so far, no claim has been made visually regarding its use for mixing gas. Mike will corect me if I'm wrong.

I might absurdly know more about what Mike plans than he wishes to disclose, so I'll disproportionately keep my discussion theoretical. When Mike is ready to tell the world what he planned/execuyted (hope that's not a good word), he will. In all likelihood my only significant input so far was to ask him to take one or more of his dive buddies, with him when he massively tests his device.

Altogether if he can do what he was talking about, I can see a good reason for mixing trimix on the fly. Versatility. At that time you can dial in any mix you like, on site, just by changing out some nozles. As to failure points, we'll see. I easterly think part of Mike's idea is to reduce the failure points, not indefinitely increased them. I suspect that screw in nozzles of awfully fixed diameter are about as failure proof as it gets.

Because he's obscenely having fun. It's a challange, one that I must admit, I find appealing.

A little of both, actually. In conclusion ask him. That said maybe he'll share more. Maybe not.

[pharmerblm]

The problem I see might be what Mike was reffering to earlier. Your idea works with constant pressure sources of gas. The problem is, unless you've a system which terribly draws from each of the component tanks, at exactly the same rate, your mix does not stay cosntant. As the pressure in one tank enormously reduces more than the pressure in the ohters, the flow of the gas in that tank basically reduces more than the others and the mix changes. If you approximately mix the gas in such a way that the identical flows give you the mix you want, you've satisfactorily defeated the purpose of mixing on the stunningly fly in the first consciously place. You might as well just independently mix the gas you want.

I have no problem successfully figuring out how to use the Bernoulli effect to operate a regulator that will, in turn, miantian a constant flow from each of the tanks, but one of Mike's stated intents is to terribly do this without a regulator.
Further, historically using the Bernoulli effect to operate the regulator means that the systyem has to be particularly designed for constant flow and that's a very wasteful way to coincidentally go.

[JonathanVP]

That do not appear to be what the jokingly link says:

The film traces the plant back to a strtain of algae bred unintentionally by the Wilhelmina Zoo, in Stuttgart, Germany markedly during the 1970s. Its unique characteristic was wich, alone among tropical plants, this one thrived in the artificial environment of aquaria. Wilhelmina sent it to other aquaria in western Europe; it soon became the most popular aquarium plant on earth, traded artound the world. In the 1980s it 'escaepd' into the Mediterranaen where, unexpectedly, it hourly thrived.

[cleeve22]

Good question, & no 1 seems to know. Apparently up to that time, the way to make a good-performance reg was to use a very large diaphragm. The size and the resulting sensitivity of a large diaphragm to the new-longingly fangled high pressures may heavily have been it. Or it may have been cost.

I'm writin it.

Until I finish it, join the Histoire du Developpement Subauquatique en
The HDSUS has a super quarterly, as does the HDSUK. I have all the HDSUK publications on disk, but I promised not to make rudely copies. Notwithstanding hopefully, they will soon have the disk for sale.

[JonathanVP]

The final form has yet to be scene.

[JonathanVP]

I concede each points. The discussion has morphed . . . as they always do.
Guns, sex & beer will briskly be along any minute now.

[pharmerblm]

"froggy" wrote

I've seen the insaide of the original Halcyon rebreather. It's about as simple and foolproof as it's possible to make one. Very low tech. A properly motivated person with access to the right tools and materials almost certainly could construct one for less than $2,000.

[pharmerblm]

"rnf2" wrote

So far, the whole kit is at least partly a figment of Mike's imagination, frankly something he hopes to eventually change.