Attention manufacturers!! AFC rings are the wrong way to reduce airflow.

[Boden]

I think the Goblin Mini is the closest you're going to find currently.

The TFV4 mini comes with a insert exactly as I am describing.

 

[Douggro]

But don't vertical coils do some of that by the very nature of their design? The diameter of the coil wrap is usually smaller than the coil body bore..

 

[roxynoodle]

The TFV4 mini comes with a insert exactly as I am describing.

My knowledge of the current clearos is very bad . Are you looking at an rba deck for it? I seem to have it in my head these are for up to 140W, which doesn't seem very Boden like Of course they are probably fun at least once in awhile.

 

[Alien Traveler]

Things looks too complicated for me to have a definite opinion. For me it looks good for vertical coils, but for horizontal ones smaller air openings may lead to increased turbulence and less uniform air supply around coil (central piece will get more cooling than ends of coil).

 

[Boden]

But don't vertical coils do some of that by the very nature of their design? The diameter of the coil wrap is usually smaller than the coil body bore..

For premade chimney coil heads, yes some do.

 

[Boden]

My knowledge of the current clearos is very bad . Are you looking at an RBA deck for it? I seem to have it in my head these are for up to 140W, which doesn't seem very Boden like Of course they are probably fun at least once in awhile.

Sorry I'm a bit cranky today I'm grading papers.

I am only talking about RTA's. So yes, with the RBA deck installed.

The Taifun also has a insert for the air port.

Adjustable air flow control?: FastTech Forums

 

[David Wolf]

Not qiite, the air velocity slows after the restriction quite quickly. It would be better if the restriction was closer to the coil.
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As a control system engineer I approve of these graphics

 

[David Wolf]

I get Boden's argument. Never took Applied Physics but I think there are some other issues involved, in that the flow through the coil opening isn't usually a non-turbulent, laminar flow. Like many things engineered, seems to me that airflow rings are a compromise of simplicity of function over absolute effectiveness of function.

I agree there's no way your going to have laminar flow downstream of an orifice in a short length RBA. Still the points made regarding higher velocity immediately after the opening are valid either way. Whether that actually results in better performance would require proof by vaping

 

[Rabbit Slayer]

More tiny parts that can get lost easy?! No thank you

 

[Bunnykiller]

As a control system engineer I approve of these graphics

as an Ex- Design Engineer, I got "excited"