Steam-engine and coil length question

[TrollDragon]

Every rta/rda is different, you are going to have to play with some builds to find the sweet spot on that specific atty. Coil size, height, distance from the airflow all play a major role.

What rta are you going with?

 

[Kennneth]

Every RTA/RDA is different, you are going to have to play with some builds to find the sweet spot on that specific atty. Coil size, height, distance from the airflow all play a major role.

What RTA are you going with?

Initially getting an Advken Ohmega 2 (inbound). Not because of any particular reason other than to practice and get experience on and squash any incorrect/inaccurate preconceptions I have. It looked decent for a 22mm to do that on for $9.

I'll be getting a mod that has more energy storage ability also and accepts 25 mm attys. That is when I decide which one.

Right now I think I want a dual 18650, slide top fill atty, ArticFox. I like the Pico 21700 though but not as much energy as 2 18650's. With that said, I want to find out with the Advken the level of vap I like with a minimum power settings (type coil build that works best for me). Real experience is seriously lacking atm.

 

[sonicbomb]

There is a rule of thumb though: you want your coil as far into the airflow as you can get it.

I beg to differ, it's entirely dependent.

 

[bombastinator]

I beg to differ, it's entirely dependent.

It is. Any atty any build is just very changeable. For one the airflow may not actually be where it looks like it is.

 

[bombastinator]

Computing fluid dynamics is actually quite old, there are even online simulators that run off simple Java or Flash. As for gaming, they have been using fluid dynamics for quite some time – like Geoff Crammond’s Grand Prix from back in the 90’s was extremely complex despite it’s graphics was very basic.

The one I was considering when making that statement was the one in X-plane which is a physics based flight simulator which has been around for a while. The issue is those systems all assume an infinite outer space. With an atty though you not only have an object to deal with, but the interior shell of the chamber as well. It’s not an object moving through an open space. It’s an object of variable dimensions in an enclosed space of variable dimensions in an atmosphere that changes drastically over time. You’ve got to model all of it while modeling the buildup of heat and how it changes the situation as it builds up. I was thinking it would be a lot more like modeling a car engine piston cycle that is also a mass airflow sensor. Auto manufacturers do this kind of thing, but they use some fairly big iron to do it.
It is possible there are simplifications I’m not seeing.

 

[TrollDragon]

Initially getting an Advken Ohmega 2 (inbound). Not because of any particular reason other than to practice and get experience on and squash any incorrect/inaccurate preconceptions I have. It looked decent for a 22mm to do that on for $9.

I'll be getting a mod that has more energy storage ability also and accepts 25 mm attys. That is when I decide which one.

Right now I think I want a dual 18650, slide top fill atty, ArticFox. I like the Pico 21700 though but not as much energy as 2 18650's. With that said, I want to find out with the Advken the level of vap I like with a minimum power settings (type coil build that works best for me). Real experience is seriously lacking atm.

I have never used any of the Ohmega line. It seems to have deck similar to the OBS Crius Plus so it should work decent, but it's also quite dated and there are much easier RTAs out there to build and wick. I'm one who dislikes rewicking gear, which is why I use Rayon (longevity and pure flavor) instead of cotton and primarily use postless deck RTAs (Aromamizer Plus and Aromamizer Supreme V2.1). The postless builds can be dry burned and rewicked in a couple of minutes.

Dual coil RTAs can be more of a challenge for first time RTA users since you have to get the wicking right on two coils, too loose and it floods or leaks, too tight and your getting dry hits. This can be on both coils or just one. It might be better to start with an Ammit 25, Serpent SMM or Augvape Intake which are all single coil.

The only single coil RTAs I still use are the OFRF Gear and BSKR V1.5 for MTL salts, everything else is either dual or squonkers. Others might have better suggestions for current single coil RTAs that have excellent performance.

Good luck with the Ohmega 2, there should be a ton of review videos on YouTube for building tips.

 

[MacTechVpr]

On the accurate use of Steam-Engine…

If you look at the right hand table in this example you will see the calculated coil width.
Coil wrapping | Steam Engine | free vaping calculators

You make a good point. It's listed but I've not found the calc to be exact and I'm not always sure why. If we're taking about the same thing?…It's #turns+spacing(wire width). However most I don't think use S-E accurately as they just set the target res and if it's close run with it.

For your ex. the target res accurately if you chose to round down to half turn (return coil) would be 4.5 turns, or 0.2435Ω — Coil wrapping | Steam Engine | free vaping calculators

The width of 2.898 is rounded to 2.9. Hmmm, close enough. Mebe not so much if the calc is done at .25Ω (4.63 turns) rounded to 3mm.

At installation that extra 10th might mean the difference as to whether we end up having to constrain the leads inward or splay them out (induce strain) and producing some end turn separation. Such subtle variations in strain no matter how neat and consistent the wind otherwise can sometimes stifle our expectations of what may be otherwise an outstanding wind.

Just sayin. It's about matching the build to atty geometry as best as possible. Or not, cause it ain't goin there.

Have a great Memorial Day weekend all.

Good luck.