Primary in a Corny - how much headspace?

I for one am curious as to what you find out with your experiment. If you don't end up making a post about it, would love to hear more one day.

 

Fun to imagine a Blichmann April fool's joke along the lines of a homebrew-scale fermenter that is as tall as a commercial cylindrical-conical but, you know, like a centimeter in diameter or whatever it takes to keep it within the 5-gallon range. "Brew like a pro! Ferment warm without an elevated ester level!" Could be made of stainless but with a sight tube.

Not mocking the vase idea, by the way, which I think is interesting. I assume there is some kind of stopper that can fit in the vases?

 

I haven't figured out the top yet. For the time being I'm thinking foil or saran wrap.

 

Don't know about Wisconsin, but around here a foil covering would mean fruit flies in the wort/beer this time of year.

 

We get a few fruit flies just in July & August, not when it's cold like this in October. Great point, though. I'll have to figure out a more solid lid.