The showdown!
I have made several beers with both Fermentis Safale S-04 (English Ale) and US-05 (American Ale). Typically, the type of beer style matches with the choice of yeast because it will produce appropriate qualities to the beer type. English yeast will attenuate less, leaving a higher final gravity for a more malt-focused beer and American yeast will attenuate more, resulting in a lower final gravity for a dryer beer.
In the spirit of experimentation, I wanted to compare the characteristics attributable to the Safale S-04 and US-05 yeast strains in the same wort. This would also give me a chance to try out some 10 gallon batches on my system. I split the grains into two mashes and combined the wort from them, boiled for the hour, then cooled it with an immersion chiller. I split the wort into two 5 gallon class carboy fermenters, and pitched the American strain in one and the English strain in the other.
I have done this with the last two batches of homebrew, using two of my most established recipes.
- Citra IPA with OG of 1.058
- Amber Ale with OG of 1.050
Both of these are currently still in the carboys, but I am already noticing big differences in the yeast characteristics. These were both originally American Pale Ale/IPA styles, but I am hypothesizing that the use of the English yeast will push those versions into the English IPA and English Pale Ale/Extra Special Bitter (ESB) style. Two brew days will ultimately result in 200 bottles of 4 different types of beer!
I will post the findings of my experiment, focusing on these attributes:
- Color - big differences, including a "color swap" during fermentation
- Attenuation - comparison of the final gravities
- Flocculation - how did the yeast drop out of the beer?
- Fermentation activity - English was way faster and had a much larger Krausen
- etc.
I should be bottling the IPA in about a week and the Amber about a week after that. I will share the results at a later date.
English on the left and American on the right.
American on the left and English on the right.