@Croak: What I think you're trying to say is that a constant power configuration won't work the same as a tc mod configuration, which is, of course, correct.
What I'm attempting to do is use titanium in a pseudo tc configuration for mechs. Not a constant power built. Bearing in mind that the power drawn by the coils will vary based on the temperature they reach (temperature dependent resistance), which is a function of how much juice and air reach the coils. More juice flow to the coil/wick and more air contact through flow/pressure means the power drawn with vary widely in a constant voltage configuration (well, as close as is practical in a mech). In this way we can design with both TC and mech in mind. Titanium given me a fast ramp time for reaching temperature and once I start drawing air through, it quickly reaches acquiescence. I haven't developed a formula for this design, there are too many variable to consider, but through trial and error I can hone in on the optimum power for a given tank using a tc mod as the test bed.
So far I've optimised power for six tanks this way, all of which can be used on a mech or TC mod and perform more or less the same with air flow wide open. Subtank Nano (rebuilt V2 coil), Subtank Mini RBA, eGo One, eGo One Mega (both rebuilt CLR coils), Zephyrus and Goblin Mini. The Bellus is simply the latest addition.
I could wring 75W out of this unit, but I wouldn't be able to top fill it without leaking using a wick density capable of this power. Balancing air flow, coil size/area, wick area, wick density, juice viscosity and power has lead me to the current configuration: dual 2.7mm ID 26g titanium coils of five wraps @ 0.12 Ohms (0.124 according to the design calculations), filled with a very light, #400 stainless steel mesh reinforced Japanese cotton wick trimmed to the lower lip of the juice channels. In this configuration I can push 70W through it in tc mode @290 degrees Celcius, or what I estimate to be about 65W on a full charged tube mech.
By reducing the coil size to 2.5mm I could reach a target resistance capable of 70W, but so far I haven't been able to wick enough juice through a coil this size to handle it. The only other way I can see this workingon a mech, is using a dual parallel battery mech to reduce voltage sag under load. Unless John can educate me on his mega wicking power!
