New version out and about

      10 Comments on New version out and about

The revamped version of the code has now replaced the old version.
Now to spend the rest of the day pressing F5, waiting for bug reports to tick in.

By the way, there’s a couple of brand new features in the coil calculator:

New heat flux interface

When I first made Steam Engine back in 2014, uttering the words “heat flux” in the presence of vapers would only evoke blank stares. I still chose to include the value as an unremarkable little output under “advanced results”.

Fast forward a couple of years, and people had started taking notice. When I discovered that some paid app even had one-upped me by giving heat flux a more prominent place in the user interface, I quickly followed suit, moving the value to the the more visible “basic results” section. A small coloured icon was added in order to draw the user’s attention, while simultaneously giving them a hint about what’s hot and what’s not. I still wasn’t sure that this was something vapers would actually care about, though.

The last year or so has removed all doubt. I see people on forums discussing what heat flux they prefer to vape at, everyone who’s into coil building seem acquainted with the term, and some even use it as a starting point for their builds. It seems the concept is here to stay. Time to update Steam Engine accordingly.

You can now enter the heat flux you want to vape at in the “new old” coil calculator. The calculator will then tell you how much power or voltage your mod needs to provide in order to reach the selected heat flux.

In addition to being more intuitive and more practically oriented, this also solved the problem with how to recommend a reasonable power/voltage setting for the mod. Now that the heat flux dictates these numbers, it’s no longer a question of a practical but ultimately subjective estimate, now it’s a straight forward and objective calculation. Two birds with one stone.

(The next challenge would be to automatically suggest a heat flux based on the heat capacity, and possibly some other values, but that’s a task for another day.)

Incidentally, I also plan to implement something similar in the Wire Wizard, although it is a bit more complicated because the heat flux will have to be an average of all the wire components. The required voltage will depend on the TCR and the temperature at any given time, so I’m not quite sure what exactly to display yet. The preheat and boost features of many modern TC mods may complicate matters even further. There’s definitely some design decisions to be made there.

Ok, back to the “new old” coil calculator:

Dynamic step size for target resistance

When you use the arrows (or the arrow keys of your keyboard) to adjust the target resistance in the coil calculator, the step size will now depend on the selected resistance at any given moment:

  • Below 0.4 Ω: Step size 0.01 Ω.
  • 0.4 Ω to 1 Ω: Step size 0.05 Ω.
  • Over 1 Ω: Step size 0.1 Ω (like before).

This should give the sub-ohmers some long awaited fine control when approaching the holy grail of the short circuit. 😉

10 thoughts on “New version out and about

  1. AALG

    There is a bug in the new version for the wirewizard. Tried it with I.E. Edge and Chrome.
    Select wire wizard.
    I-D 3 mm
    Number of wraps 7
    Leg length 7
    Wrap spacing 0.1
    Number of wires 2
    Twist Pitch 1.4 mm

    No matter what gauge of wire you select (in the above case I want Single wire, SS316L, Round, and 26 AWG (0.405 mm)) the Twist pitch will say Too small; overlapping

  2. Matt


    Why don’t you include more presets for Mods (Mod Range).

    Users could submit but someone have to accept it before it goes online. That way anyone could contribute. You can even make a rule like if 10 users enter same settings for a particular mod it gets automatically published.

    1. Dampmaskin Post author

      Hi. The idea is sound, and I used to have a free text form for this, but I received so many requests with no effort or numbers (or sometimes wildly implausible numbers) behind them, sending me on wild goose chases looking for sources and specs that were simply not available. I wasted way too much time, and was able to add far too few presets that way. See this blog post for more:

  3. Phil

    I noticed a pretty big difference in the old vs. new versions regarding aliens.
    In the new version, it gives a resistance value of 0.202Ω, pulling 4.95 amps. In the old version, the value is 0.255Ω, pulling 3.92 amps.

    Cores = parallelx3, 26KA1
    Wrap = 36N80
    I.D. = 2.5
    Wraps = 5.5
    Leg Length = 2
    Wrap Spacing – 0.05

    1. Dampmaskin Post author

      Hi. Most people seem to find the new heat flux interface superior. But if you prefer the old one, it’ still here for you to use.

      The Resistherm TCR is calculated from a temperature curve which should give more accurate results, and be the effective TCR in the range of temperatures that are relevant to vaping. See this post for details:


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