If airflow was the MOST limiting factor with kangers then it wouldn't be producing TWICE the vapor output with rebuilt duals vs. rebuilt singles in an Aerotank. And it DOES. And at 10watts per coil the juice flow keeps up with as many 6-8 second hits as you can throw at it.
True, you can vape single coils at 15 watts or more if you take short and less frequent hits but NO wick medium will deliver sustained long chaining hits past 10watts in a kanger from my observations. Not kgd, rayon, nextel or any of the other half dozen mediums I have tried. Hell, if I pre-wet kgd like a dripper I can slam it with 30watts for 2 or 3 short hits but it's gonna go dry in a kanger.
The limitation IS at the wick/tank interface. Right there where you have to ensure enough wick compression to stop leaking and you're in constant opposition with vacuum. When someone finds a way to overcome that let me know.
Oh yeah..........it's called a Lemo RTA!
Vape on friends and be happy with your kanger at 10 watts per coil if you've achieved it. It means you're doing great!
cig
Sorry for the long rant. I would ask those of you really interested in curing performances issues, not just with Nextel, to take a few with this post. Some really crucial elements here.
I break the speed limit routinely cig. Insofar as the LEMO I'm waiting to see what Kanger has in the Sub b4 I start jumping on every kinda clearo kay rip comin down the pike from China. And I'd rather drop the dime on a US made quality device like the
Stratos before we start endorsing and popularizing any others on this very effective venue at ECF helping them sell the stuff by showing folks how to rebuild it. China gets enough from us already.
i sorta disagree cig, as I just pointed out there are
zero flow limits with Nextel at 60W. And while I don't prefer the XC-132 for that (experimenting now with trips, quads and 8's) I've run it at 60 watts without constraints singles and duals.
To be clear, that's to say that it never dried out as in a single on an RDA for example at those power levels provided eliq available, no hot spot/s, constrictions or damage to the weave.
You're absolutely right that 10 prob, 12 certainly is more than enough for the average user and those learning to rebuild. In that Kanger on KGD or Nextel is excellent.
We have to provide enough compression of cotton variants to seal the interface. That is a deficit. We don't have do that with Nextel. It has a rather ideal geometry for a 1.8-2.0mm slot. Nextel has a different problem. Although it's permeability is constricted by the tightness of the weave and 10 micron fiber matrix it can reach a saturation limit. And at high heat/power (pressed) and
juice logged and it may disgorge as it cools. Some slight dampening of the interior of the cup may occur. Why does that happen?
Nextel's transport improves with power applied as it consistently vacates. There is no overall [saturation] limit even at 60W. If so where is the hint of a limit? Scorched taste? Where is the indication of inadequate transport? Even given high power there must be enough air to ensure transition. If pressed and flow is brought to a high rate with increasing heat and viscosity it will approach the limit and hit it if there is inadequate airflow.
Point made.
Vapor output diminishes relative to tank temperature overheating. Overheating in a closed tank
only occurs when there is insufficient air to complement juice supply and adequate energy for vaporization. Otherwise you have equilibrium within the design. The result is oversupply of juice. Normal operation.
I've
never taken a dry hit on properly kilned
undamaged Nextel, ever (except at break-in on a practically dry wick). Only way I could see that happening is if the wick itself was constrained at setup. Stuff saturates instantly on contact. Occasionally some air locks in it when freshly installed. Nothing a dry tug don't resolve. But that's where you might take one, if you forget. In operation. Not to say it can't be done. Just never seen it.
The only times I've come remotely close to getting ahead of the vape in a KPT is with highly overtightened t.m.c.'s so flaming hot rather immediately that they were almost too hot to touch. Obviously a problem and you don't press that
Reason, even in the improved Mega design it's pretty evident that even tightening up the thread tolerances has not resolved leaking past the threads at low viscosity. And the more power applied even during normal operation the greater the likelihood.
So you would tend to flood out, i.e. lose power efficiency, before you got to a dry state. If you have, your wick is constrained, crimped (same thing) or perhaps over-kilned. Now
that I have encountered.
I would also add that I use Nextel extensively in a broad spectrum of devices and I do vape them dry. So I now perfectly how it comes about and to recognize it. And Nextel gives more ample warning of that condition than any other media I've encountered. It's a simple tell
vapor output and accordingly flavor starts to diminish. It feels like a dull battery. The same applies in a Protank but is indicative of too much power
relative to flow and air. And it makes perfect sense, no air, no vaporization
no flavor.
Here I'm going to add an important insight, I think. There is no better way to sludge a PT, or any device, than to drive it hard
underpowered. By that I mean in a low voltage state. In a Protank if you drop much below 7W and push it hard your are going to overheat just as badly as at the top with too many watts. Perhaps someone with much better understanding of batt's can kick in on this. You've dropped below the point of efficient power reg for the chip, are straining the battery and power is inadequate at the coil for efficient vaporization. You will gunk your coils madly if you do this routinely. On any device. With any wick. No matter how good or efficient the coil. It has the same effect as a bad contact short.
I've got some power variables coming in and we'll be looking at higher power op's in future to further test Nextel's limits. So far it's been a test of saturation and finding ways to more effectively reduce it.
Cotton variants like KGD that have a linear fibre alignment I would have to conclude that something similar is happening.
I'd agree with ordinary cotton and to some extent rayon, if you're getting 10-12W you're doin' good. And for most of us that's just dandy.
Wish us luck.
