Mechs and RDAs

[Darth Omerta]

So last night i built my very first coil, it went well, i can improve and i plan to in about an hour. Before i do, i have a question about using builds on mechs.

I use mechs exclusively. I like them, they work for me and i am not ready to give them up. I use vtc4s and recently started using LG HE4s in the rotation. The 2 mechs i use the most are the hammer and the king v2.

I built my dual coil system yesterday at a total of .9 ohms. What a difference it was. Bigger cloud than even my aspire atlantis does with .5ohms. Better flavor (though still has room to improve). Just a great hit.

But then i got worried. A bigger cloud with higher ohms? Better vape? Im not used to higher ohms giving me the hits i like. Now im wondering if im doing the math right for battery safety. Instinct tells me that if a battery can handle .5 ohms on a given setup then it can definitely handle .9 ohms.

 

[Hans Wermhat]

Use steam engine to check the math, but yes, higher ohms can make bigger clouds. I learned that last week. The surface area of the coil effects the size of the cloud more than the resistance. As long as you have the battery power (voltage) to fine the coil, a 10 wrap coil will give you more vapor than a 6 wrap coil. That's how you see guys with a regulated mod chucking fog banks at 50 watts. They crank up the voltage and build a huge coil. On a mech, it will eat up your batteries quickly tough.

 

[Darth Omerta]

Well Ive been vaping on it since i fonished the build last night at around 830. Baby woke me up early this morning and so ive been dripping about 8 hours total and not even a dent in volt output on my vtc4 yet(according to my multimeter).
My main concern is safety. Since I'm not used to building yet i can psych myself out when i the math checks out but i get unexpected results.

Is there ever a time where the battery is too much for the coil with dangerous results?

 

[Hans Wermhat]

I don't think so. If you put too much battery to a coil, it will likely just pop the coil. As long as you don't inhale a piece of glowing hot kanthal you should be ok. It's putting too big a draw on your batteries that is dangerous.

 

[Hans Wermhat]

I think those VTC4's are 30A CDR, right? That puts your safety mark all the way down around .15 ohm I think. I'm an electrician by trade, but not a Master. The trade has taught me to never exceed 80% of a material's maximum ampacity, so .15 is pushing that mark, but is still below 30A

 

[Hitcat44]

Is it Possible for;
Battery "too much" for Coil? No.
Coil drawing too much continuous Amp draw for Battery-Yes.

As stated above, use Steam Engine to determine the overall Dynamics of your Device and Build then pay close attention to the Amps. As long as it is well within the Range of your Battery(s), no sweat.
I typically like to stay around the 8-10 Amp continuous Range just to be safe. That's about 50% of the Samsung 20's I use in my Mechs.
Your and Others mileage may vary on that Stance.

P.s. The top 3 lines was a General Statement. Not about your current Build in particular.

 

[Darth Omerta]

Awesome. Thanks!

 

[roxynoodle]

You are well within amp limits of both batteries

I = E ÷ R

I = 4.2 ÷ 0.9 = 4.7A

 

[Darth Omerta]

I think those VTC4's are 30A CDR, right? That puts your safety mark all the way down around .15 ohm I think. I'm an electrician by trade, but not a Master. The trade has taught me to never exceed 80% of a material's maximum ampacity, so .15 is pushing that mark, but is still below 30A

Im a bit of a physics nerd myself, currently trying to get into a university to get myself a degree. What that has taught me is that my theoretical physics is generally pretty good, but when I try to apply the theory to some sort of engineering endeavor(ie: coil building) I usually end up screwing something up in the construction. Solution???? I check my results over and over and over until it becomes a nuisance even to myself lol! Im comfortable in the .5 ohms and up range.

You are well within amp limits of both batteries

I = E ÷ R

I = 4.2 ÷ 0.9 = 4.7A

I dont have my notepad with me but Im reasonably sure thats what I came up with.

 

[Hans Wermhat]

I hate math. Thank goodness for steam engine!!!

 

[Hitcat44]

Same here.... Firm and easy grasp on Physics and Mechanical Engineering Principles but for some strange reason Electricity just didn't seem to ever "click" in the Mind.
Vaping has been an excellent Conduit for getting past my Personal Quirks with Electrical Stuff and now am comfortable with the General knowledge stuff that Vaping Life requires.
Another Plus from the Hobby.

 

[roxynoodle]

I minored in physics. But, pure physics and real life application can be different. That's where engineering comes in. Even with vaping, we can easily calculate current drainage or power, but we aren't taking everything into account. There will be voltage drop and inefficiencies on regulated mods as well, and batteries degrade over time.

 

[Darth Omerta]

I hate math. Thank goodness for steam engine!!!

Oh man....give me the math all day long!!!!! I love to calculate, recalculate and do it again. As long as its calculus, some of the upper level mathematics which are not calculus based are just silly mathematicians playing with imaginary numbers

Same here.... Firm and easy grasp on Physics and Mechanical Engineering Principles but for some strange reason Electricity just didn't seem to ever "click" in the Mind.
Vaping has been an excellent Conduit for getting past my Personal Quirks with Electrical Stuff and now am comfortable with the General knowledge stuff that Vaping Life requires.
Another Plus from the Hobby.

I have no problem with the theoretical side of any kind of physics, but I can never seem to trust myself when trying to apply it.

 

[roxynoodle]

Hey now, I majored in mathematics. We aren't silly and just playing with imaginary numbers

 

[Darth Omerta]

 

[Hans Wermhat]

Give me steel and wood and I can build you anything you want. I'm good like that. Just don't ask me to explain the physics behind how it holds up its own weight.