AG#130 London Pride / ESB Partigyle
It's been a while in the planning (
discussed in depth here) but I finally got round to brewing this earlier this week.
For the uneducated, partigyling is basically boiling the first and second runnings seperately, then blending them to make two or more different beers. This is how Fuller's make ESB and London Pride (and Chiswick Bitter too).
GYLE #1
15L tap water, 5.0ml Lactic Acid 80%, 2.0g CaCl, half a Campden tablet, giving:
Calcium 156
Chloride 102
Sulfate 41
Alkalinity 103
4000g Maris Otter
300g Dark Crystal Malt
10g Chocolate Malt
4.310kg TOTAL
11hr overnight full-volume no-sparge mash @ 65°C
BG 1.074
Boil 60mins:
14g Target 10.0% AAU for 60mins
1/4 Britewort tablet 8mins
20g Challenger 6.5% AAU for 3mins
10g EKG 4.5% AAU for 3 mins
20g CML Northdown (Leaf) 5.76% AAU for 3mins
Collected 8.0L @ 1.091 (but about 1L of that was trub)
GYLE#2
15L water as above
Gave the grain bag above a decent squeeze then continued mashing:
2hr full-volume no-sparge mash @ 65°C
BG 1.015
Boil 60mins:
7g Target 10.0% AAU for 60mins
1/4 Britewort tablet 8mins
10g Challenger 6.5% AAU for 3mins
5g EKG 4.5% AAU for 3 mins
10g CML Northdown (Leaf) 5.76% AAU for 3mins
Collected 10.4L @ 1.020
Blending the 2 Worts
ESB:
3.5L Gyle 1 + 3.0L Gyle 2
=> 6.5L @ 1.056
Expect it to end up around 1.016 and 5.3% ABV
London Pride:
3.0L Gyle 1 + 6.5L Gyle 2
=> 9.5L @ 1.046
Expect it to end up around 1.013 and 4.3% ABV
Into each FV I pitched a full pack of Wyeast 1968 London ESB Ale. Fuller's fermentation schedule is to start at 17°C, raise it to 20°C over 10hrs, hold until it reaches half-OG, then back down to 17°C until it reaches quarter-OG, then crash down to 6°C for before packaging.