Derek, it's looking pretty clear to me that new cubic is most accurate for FG. But do you have any insight yet into whether Novotný is closer on partially fermented beer, or is that jury still out?
Hydrometer: 1.012. Refractometer WRIf: 6. OG: 12.4°P. Correction factor: 0.97. New Cubic wins again: sg1.0119.
I find new Cubic to be the most accurate for me. I typically have Attenuation in the upper 80s and new Cubic seems to favor high Attenuation. New linear seems to work well for Attenuation in the low 80s.
Checking back through my numbers, Novotny would overshoot on every batch.
Honestly I don’t. I have to question whether there is even any utility in knowing mid fermentation gravity. When we spund, we are typically doing it with 4 points or so remaining and that’s close enough to final gravity that Terrill’s equation are bang on for me and most of the rest of the LOB crowd.
Maybe I’m being a bit short sighted? Is there a reason why we would even care about mid fermantion gravity? If not, then that gets rid of one of the major selling points for the Novotny equations. Add that to the fact that, for my beers at least, it’s wildly innacurate (estimated a correlation far lower than actual).
I do plan on entering data into my modified sheet over the next 10 batches or so and seeing how it turns out.