RDA Coil-over-bed vs. thread-through-coil - any drippers'n'chasers still doing the former?..

[Dearth Vapir]

As per the title!

Using rda's on mech. mods 18650 and Derringer, 26650 and Buddah/Zephyr mk2-'ish' clone, and still using coil over (rayon) bed for my builds at between 0.18 and 0.2 Ohms per build with dual coils - love the hit, love the flavour, and the vapour volume, even from the little derringer, however I can't help thinking I'm wasting power (into atomiser body via wick bed and juice) this way...

Any other reasons an otherwise seasoned 'vaper' should *finally* switch to wick-through-coiling for my dripper rigs?

Oh yeah and using rayon, I regularly wash my wicks and replace, easily - can this be done with rayon threaded wicking?

Cheers folks,

Shaun/DV ',;~}~

 

[93gc40]

the wick has NOTHING to do with power levels. The coil will use the same amount of power regardless of the wicking method. All the wick does is provide juice to the coil to be converted to vapor. I suppose a more efficient wick, might require more power to create vapor, due to more juice being present. Meaning there is more juice to have to heat to get the vapor.

 

[entropy1049]

Very seldom do I not run wick through the center of the coil. One exception is on a set up that blasts through juice due to high current/low resistance such as series boxes approaching battery capacity. Then I do this. Works a charm:

 

[Dearth Vapir]

the wick has NOTHING to do with power levels. The coil will use the same amount of power regardless of the wicking method. All the wick does is provide juice to the coil to be converted to vapor. I suppose a more efficient wick, might require more power to create vapor, due to more juice being present. Meaning there is more juice to have to heat to get the vapor.

Thanks for the reply bud, but I don't think you understand what I was getting at - I should have been clearer, sorry: -

With the bed-under-coil wicking, there's a BROAD, SHORT and direct path for heat to travel from the coil to the atty body, via the full surface area of the juice soaked wick bed - a lot of coil heat is conducted to the atty body and quickly which equals wasted battery power heating the atty, instead of just the juice which is JUST about to be vaporised - it leads to a quicker heating up of the atty and mod. and reduced battery charge life Vs. the wick through coil system, where a much smaller area of wick is in contact between coil and juice well/atty body, and where the heat path in question is also longer in distance.

Some of the loss is mitigated by having the juice pre-heated to such a degree before it gets to the coil, but with the heat conductivity of the atty and mod (esp. with all-metal mods) not so much, as it's conducted away so quickly.

I hope I've sufficiently clarified my point for you!

I'm still looking for (other) pros and cons between the two wicking methods - better/worse flavour? Better/worse vapour volume/thickness? Etc. if anyone has any input on these or other fronts I haven't already covered I'd be very grateful to hear them.

Cheers! ',;~}~

Shaun/DV

 

[Dearth Vapir]

Very seldom do I not run wick through the center of the coil. One exception is on a set up that blasts through juice due to high current/low resistance such as series boxes approaching battery capacity. Then I do this. Works a charm:
(pic.snipped)

!Wow! - Does that not get HOT?!? I used to do my nano build similarly but none of my rigs had posts like that to support it all, and my wicks used to just get *blown* off the sides of the coil heheheh ',;~}~

Cheers for sharing bud!

Shaun/DV

 

[93gc40]

You may be loosing power due to having to heat the juice pool prior to getting vapor. But not to the heat sinking affect of the atty body. That heat is from the excess heat you are applying to the juice pool. I don't see how the atty body getting hot is costing power, unless it is part of the resistance path. Which it wouldn't be unless you were shorting. You coil cooling is coming from the juice bed yes, but not the atty deck it is resting on. I can see where the atty would get hotter than with a wick through coil. because in this case more coil heat will be dissappated to air. Juice holds heat better than does air. IDK, more I think of this the more I see your point. I'm not convinced the atty body is costing you battery power. But I do see how the bed configuration could increase ramp time and slow vapor production, because of all the heat sinking, juice and atty.

My thinking is you probably would get better flavor from the bed and better clouds from the exposed through coil wicking styles. also because of the increased exposure to the air flow, the atty staying cooler, but with warmer vapor.

 

[entropy1049]

!Wow! - Does that not get HOT?!? I used to do my nano build similarly but none of my rigs had posts like that to support it all, and my wicks used to just get *blown* off the sides of the coil heheheh ',;~}~

Cheers for sharing bud!

Shaun/DV

Cool as a cucumber my friend! Just one of the reasons I love this build on juice guzzling atties

 

[Dearth Vapir]

You may be loosing power due to having to heat the juice pool prior to getting vapor. But not to the heat sinking affect of the atty body. That heat is from the excess heat you are applying to the juice pool. I don't see how the atty body getting hot is costing power, unless it is part of the resistance path. Which it wouldn't be unless you were shorting. You coil cooling is coming from the juice bed yes, but not the atty deck it is resting on. I can see where the atty would get hotter than with a wick through coil. because in this case more coil heat will be dissappated to air. Juice holds heat better than does air. IDK, more I think of this the more I see your point. I'm not convinced the atty body is costing you battery power. But I do see how the bed configuration could increase ramp time and slow vapor production, because of all the heat sinking, juice and atty.

My thinking is you probably would get better flavor from the bed and better clouds from the exposed through coil wicking styles. also because of the increased exposure to the air flow, the atty staying cooler, but with warmer vapor.

Exactly - because you are heating the juice more, you heat the atty that's in contact with it more - it's just like an electrical pathway, but in this case you are transmitting the energy via the increased vibrational rate of atoms/molecules, rather than transmitted electron flow - works just the same way for argument's sake - coil generates heat (high molecular vibration rate), this passes to the large volume of juice in contact with it via the large surface area of wick, then is transmitted to all the juice and the deck surface area in contact with it, and does so quickly and easily because that pathway is short (wick isn't deep). The atty body isn't costing you the extra power, it's just the lowest resistance and (along with the mod - copper mech in this case), is the fastest dissipater of that heat.

I think that you get less vape per battery charge from the cotton bed system is fairly well established, the exact degree however I couldn't personally pin down lol!

Cheers again, I'm off to bed! G'night ',;~}~

Shaun/DV

 

[Dearth Vapir]

Well I've gone and done it finally - wrapped 2 new kanthal coils using 2 strands of 0.4 round pre-twisted with 0.5x0.1 'ribbon', plus one strand 0.35 round, with all 3 twisted together, then 7 slightly spaced wraps of this around 3.15mm mandrel, giving 0.4 Ohms/coil for a perfect FAT 0.2Ohm build. Wicked this through with rayon, good tight fit and it works BEAUTIFULLY!

HUGE(r) clouds, significantly MORE flavour too, and the atty and mod don't get NEAR as hot after a good bit of chain vaping so I know already I'm gonna get better battery life, but I am gonna have to drop my nic. by a bit more still I think lol!

I was gonna post a pic this being my 1st build of this kind (and only 2nd build on this 26650 Zephyr clone), but I keep getting upload errors when I try to UL the pics to my newly created album - anyone offer me any help with this?!? The error message doesn't specify what the problem is, and the images are all under the 1Mb limit?!?

Cheers folks, and be well,

Shaun/DV

 

[entropy1049]

Hmmm...maybe try a different image host? Photobucket seems pretty trouble free...LET'S SEE THAT BUILD!

 

[Dearth Vapir]

Hmmm...maybe try a different image host? Photobucket seems pretty trouble free...LET'S SEE THAT BUILD!

Not using a host there mate, just tried to UL from my PC using the interface for that but 'nada'!

Maybe I'll try my dropbox... ',;~}~

Shaun.

 

[Dearth Vapir]

Wouldn't let me UL to my ECF album from a dropbox URL, so the below will have to do I gues, hopefully it works!

Dropbox - Thursday, Dec 10

Dropbox - Thursday, Dec 10

Dropbox - Thursday, Dec 10

Cheers ',;~}~

Shaun.

 

[Dearth Vapir]

 

[entropy1049]

Wouldn't let me UL to my ECF album from a dropbox URL, so the below will have to do I gues, hopefully it works!

Dropbox - Thursday, Dec 10

Dropbox - Thursday, Dec 10

Dropbox - Thursday, Dec 10

Cheers ',;~}~

Shaun.

Looks like a very solid, practical build. Like I've said, unless I REALLY need to deliver the juice, wicking through the middle gives me the best results constantly.

 

[Dearth Vapir]

Looks like a very solid, practical build. Like I've said, unless I REALLY need to deliver the juice, wicking through the middle gives me the best results constantly.

Well, so far these types of twist-on-twisted wires have given me *superb* longevity from my coils on the rayon bed builds - the 0.18 Ohm pairing in my Derringer clone has lasted going on 6 months (still alive!), and that's with re-wicking and dry burning sometimes once a day (using some really dark and gunky home brew juices, since my faves had a lot of chocolate, coffee and TA extracts in them) - they just appear to be quite robust - am hoping for good coil life with them from this type of setup too.

As for delivering the juice, this through-coil seems to be keeping up just fine and in fact *far* better than the bed type wick I had in here previously - I'd have tried this earlier but thought it'd take a fair bit of time, and that I'd have to mess to get it right first few times but nope - took a few minutes to swap coils and fit wicks, and it ran perfect straight away. Long as I can clean my wicks in boiling water when I need to dry burn my coils clean still, I'll be a happy bunny indeed.

Only just changed to my 2nd (26650 3500 maH) battery earlier this evening as well, and only then because I felt it was about time - I'd been changing them for fresh ones 3 times/day up until then, and the atty and mod had been getting quite hot each session too.

Guess you'd call me a convert, then ',;~}~

Cheers, and g'night!

Shaun/DV.