So you think you can design a coil?
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I think I just saw a TV promo for a new Reality Program..."SO YOU THINK YOU CAN BUILD A COIL". Can't wait to see if Gary Bussey is the new host....In the first episode, they are putting 25 cloud chuckers in the same room with only 10 hours to build a perfect coil. From what I could tell, they is no ventilation on that set. Watch for it this Fall Season.
That would be a better gig for him than DWTS...
But they always have a one of those each season, makes for good TV...
Yup...he's the token this year. That MC crash really messed him up bad. Don't know if a helmet would have helped, but think it might have. Been riding motors since 1962 and have never ridden without a helmet. Saved my head once.That would be a better gig for him than DWTS...
But they always have a one of those each season, makes for good TV...
Well son....every day there's a pedestrian that gets hit by a car too. It's tougher now with all the distracted drivers. Texting and emaling....dialing and talking. Some even are vaping clouds so big they can't see out of the windows. At 75....I am not as quick as I once was. Thinking about retiring the last Harley. Kinda like putting the dog to sleep....no wonder I'm so damn cranky.
braided coils are quite good at producing cloudage, 3x 32g is good at low watts or you could go for a four strand, its been a while since ive experimented with it but since reading this thread ive braided a 3x 34g and a 3x 38g, i havent tried them yet at your 40watts as my sigelei isnt to hand and i only have mechs atm but im sure they will impress you as they did me if you try them.
heres a pic to give you an idea of what i mean..
heres a pic to give you an idea of what i mean..
Ok, I'm done pouting 
And painting
My process
1. Look at size of air port and choose size that fits within air column.
2. Make coil to fit with smallest usable diameter wire in configuration that will hit resistance goal for mods resistance output range Voltage and Ampere.
)
26:.35.2cf\l
32:.51.2cf\l
Using 32awg to cover the same width as 26 you gain ~30% more coil to wick contact area.
Increased heat dispersion and capillary functions of the wider coil
Makes sense.
And painting
My process
1. Look at size of air port and choose size that fits within air column.
2. Make coil to fit with smallest usable diameter wire in configuration that will hit resistance goal for mods resistance output range Voltage and Ampere.
I'm adding some notes to this, I'm refining my meniscus calculations. (strangely PG/VG ratio doesn't matter
)26:.35.2cf\l
32:.51.2cf\l
Using 32awg to cover the same width as 26 you gain ~30% more coil to wick contact area.
OTOH, I don't worry about coil to wick contact area. I have two Mutation X V1's and have done a bit of experimenting with them, vaping dissimilar setups alternately at the same power. In one experiment I set both up with 24 gauge Kanthal using the same 2.5mm pin. One at 0.2 ohms and the other at 0.4 ohms, so this one had twice the contact area of the first. They vaped pretty much the same at between 40-60 watts, with the bigger coil having a small advantage in flavor, but of course it had heat up delay at lower power. At higher than 60 watts the bigger coil was more noticeably better and the coil heat up time disappeared. I'm not sure if the difference was from the increase in contact area or the lower HF because I never investigated further. The difference was so small that other factors in coil design are more important to me and I don't vape at much over 40 watts anyway
Increased heat dispersion and capillary functions of the wider coil
Makes sense.
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http://www.amazon.com/Artistic-Wire-Coiling-Deluxe-Jewelry/dp/B0068RQ85KI have Juvenile Rheumatoid Arthritis which makes building coils very hard to do, try to keep my hands from shaken while installing the coil is the hardest part for me now, as I use a Coil Roller these days it kind of helps wrapping them easier at least!
Its called Artistic Wire? I'll have to look into that!! Never watched that video before!
braided coils are quite good at producing cloudage, 3x 32g is good at low watts or you could go for a four strand, its been a while since ive experimented with it but since reading this thread ive braided a 3x 34g and a 3x 38g, i havent tried them yet at your 40watts as my sigelei isnt to hand and i only have mechs atm but im sure they will impress you as they did me if you try them.
heres a pic to give you an idea of what i mean..
Twisted 32 braid
Woven 0.6 x 0.1
Try smaller wire with the same ID and coil width. Use parallel config to keep resistance within useful range.
Ok, I'm done pouting
And painting
How do you handle an atty with a single 1.5 mm dia air hole per coil? How do you take into account coil design differences for a coil used at 5 watts vs one at 20 watts? You limit your power to 40 watts but I have gone up to 100 watts which is 50 watts per coil, so 10 times 5 watts.
I'm adding some notes to this, I'm refining my meniscus calculations. (strangely PG/VG ratio doesn't matter
26:.35.2cf\l
32:.51.2cf\l
Using 32awg to cover the same width as 26 you gain ~30% more coil to wick contact area.
IMO by limiting yourself to the meniscus effect you are giving a lot of weight to an insignificant aspect of what affects liquid transfer between the wick and coil. Consider that a wick is not a smooth cylinder, but has many small fibers sticking out of it. Consider that some of the liquid is boiling and also consider capillary action. Even the outside of a 24 gauge coil is wet and that part of the coil is nowhere near the wick. Makes me think that all of the inside of the coil is probably kept properly wet all the time no matter what wire diameter is used.
Plus, in use I noticed only a very slight difference in flavor and none that I could see in vapor production when one coil had twice the surface area of another, both using the same wire gauge. And I was running them both at the same power levels which suggests to me there was negligable difference in coil efficiency.
So what am I missing here? How did you test your theory Boden? How much efficiency difference did you actually get from how much difference in surface area and how did it manifest itself?
Way to much math involved here, but I don't see calculations for airflow in the atty. If the airflow isn't sufficient to cool the coil as you vape, the high surface area coils will get too hot and ruin the flavor, and you will scorch your throat before you can get a lungful.
i have some 44g that could be braided which is 0.05mm so you could braid 4 strands which would be equivalent to one strand of 32g(.2mm) and then do your dual 3strand parallel, the braided wire would give you a slightly longer coil and would also hold onto more juice within itself than a single strand thus producing more vape, But i'm not sure its all worth the effort.
Another thing to take into account is that braided wires have a little bit of spring, they dont like to stay wrapped and like to open up off the mandrel which could be a hindrance when wrapping in parallel, although in saying this i havent tried 44g braid & the spring could be negligible, until one trys who knows
As regards the twisted coils i think you will find although yes they have a better wire to wick coverage than a single wire of equiv gauge they tend to increase flavour than clouds imo
EDIT: Sorry i got my maths wrong with the 4x 0.05 being equiv to 0.2, you would need 8strands but you get the idea
Another thing to take into account is that braided wires have a little bit of spring, they dont like to stay wrapped and like to open up off the mandrel which could be a hindrance when wrapping in parallel, although in saying this i havent tried 44g braid & the spring could be negligible, until one trys who knows
As regards the twisted coils i think you will find although yes they have a better wire to wick coverage than a single wire of equiv gauge they tend to increase flavour than clouds imo
EDIT: Sorry i got my maths wrong with the 4x 0.05 being equiv to 0.2, you would need 8strands but you get the idea
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There is a misconception that if your mouth, throat or lungs are burning that you need extra airflow, infact on the average mans setup(ie mod and atty) you will lower the flavour by doing so and still get the burning to some degree and may even make it worse as you are drawing even more vapour from your atty.
It all comes down to your juice, if you are doing hotter coils yet using the same juice it will start to burn as you are now drawing even more pg and nic than before.
People forget to lower nic strength and blame airflow, i only know this becouse ive gone from vaping at around 2ohm/18mg all the way to 0.05ohm/3mg.
Can you link me the video please? I believe I have the coil gizmo you speak of, but have a thumb screw, some washers, and a wing nut to hold my wire. Trouble is it only fits the 3mm rod, I am curious if your method works with the smaller diameter rods as well. Thanks!
Airflow, I'll get to that later.
The more surface area you distribute a set wattage across the cooler the surface temperature of the wire. If I make two coils of the same gauge and ID but one that is 4mm wide and a second that is 8mm wide and set the power supply to 10W the 4mm coil surface temperature will be twice as hot as the 8mm coil. Both coils will radiate 10W of heat but since the 8mm wide coil has twice the area it will have half the surface temperature while doing it.
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