Youngs PA fermentation 10th July 1939

We finish with an example of a Pale Ale fermentation. The whole process took 6.5 days, though almost all the action took place in the first 2.5 days. In the last four, the gravity only fell a little over 1º.

Youngs fermentations are quite unusual, with the temperature continually rising during the active phase. Hitting a peak when attenuation was about complete. Most brewers initially allowed the temperature to rise, then used the attemperators to stabilise it.

The rise of around 10º F during fermentation, on the other hand, is pretty typical.

After 42 hours, the wort was dropped. Though, weirdly, the FV number seems to be the same. Though it could be that the fermenting rounds and settling squares each had their own numbers. Most beers were dropped – when they were dropped, because not all beers were – after between 40 and 48 hours.

Youngs PA fermentation 10th July 1939
hours	FV	heat	gravity	action
0	5	60º F	1034.6	pitched
13		61.5º F	1032.1
23		63º F	1027.7
28		64º F	1024.4
37		66.5º F	1019.4
42	5	67.5º F	1016.1	dropped
47		68.5º F	1013.9
52		68.25º F	1011.1
60		69.5º F	1009.4
157		59º F	1008.3	racked
Source:
Young's brewing record held at Battersea Library, document number YO/RE/1/29.