Is it the Rayon or just a bad build?

[giles]

Somebody kindly gave me some rayon to try at the London meet, so I used it in the next build on my kayfun. 

Compared to the cotton wool, it seems to need nearly twice the power and also I'm getting leaking through the air hole (I got a tiny bit with cotton, but this is much worse).

I also reduced the resistance a fair bit on this build, but I don't see that that should be doing it. Unless of course the vamo is lying about the power value.

Any thoughts?

[VapingBad]

Not sure why giles, but you do need more that you would with cotton so much that it makes a sort of squeaky noise when you pull it through the coil.

This is how I use it in Kayfuns with 2-3 mm coils.

[Ripshod]

Sept 24, 2014 12:54:11 GMT giles said:

it seems to need nearly twice the power

I also reduced the resistance a fair bit on this build

Question and answer in the same post.

If you shortened the coil to reduce it's resistance then the area heated by that coil has reduced too, so needing more power (volts) to produce the same amount of vapour. If you increased the kanthal size to reduce the resistance then It'll take more power 9volts) to heat that length of coil to the same temperature to make the same amount of vapour

Personally I was disappointed with the rayon. Absolutely love the Koh Gen Do.

[giles]

Thanks VapingBad - I'll give that a try

Don't think so Ripshod - with lower resistance I'd expect to have to change volts, but not the power (watts). That's why we like VW more than VV.

[Ripshod]

Changing Volts changes the Power, and visa versa. Can be equally said for the resistance.

P=V²/R

[VapingBad]

But changing the power changes the volts to compensate for the change in resistance.

[Ripshod]

I'm out!!

[chykensa]

Ripshod - right over my head too

[GunJack]

Sept 24, 2014 14:35:40 GMT VapingBad said:

But changing the power changes the volts to compensate for the change in resistance.

but, any given device can only do this within limitations, as it will depend on the current draw needed to achieve the required power (P=IV, and I=V/R) so you can't just look at V and R, you need to balance all three

[giles]

True in principle GunJack, but my vamo shouldn't be showing 10 watts unless it has the capacity to deliver the current to achieve that, give or take some inefficiency in the electronics.

Point is that it is the power that is the capacity to do work, the work in this case should be just boiling the juice, I used to vape happily at 6 watts, now I need 10, so 4 watts is going somewhere else. My guess was still boiling juice, and for some reason the vapour isn't coming through. But if VapingBad is right then it's heating the coil more, but the extra heat isn't boiling the juice because the contact between the coil & wick is less efficient than with cotton.

I'm off to try that wicking method, maybe we'll find out.

[chykensa]

Sorry, was someone speaking in Russian 'about an hour ago'!?

[giles]

Sept 24, 2014 22:47:00 GMT chykensa said:

Sorry, was someone speaking in Russian 'about an hour ago'!?

My build never look as neat as that VapingBad, but it works fine now. 

(not sure I don't prefer cotton though)