Let's Brew Wednesday - 1906 Drybrough PI

We’re now at the top of the Pale Ale tree with a beer simply called PI.

At a touch over 1050º, it’s not exactly strong by the standards of the day. The strongest Pale Ale at Barclay Perkins, for example, had a gravity of 1060º. Even their Mild Ale was stronger at 1054º.

The hopping was also far lighter than in Barclay Perkins PA. A mere 5 lbs per quarter of malt (336 lbs) compared to 13 lbs in the London beer. That results in the very low for the time: just 28 (calculated) IBU.

I’m not going to get into a discussion of the recipe, as this was parti-gyled with the two beers above.

Considering it was the strongest of the set, a surprisingly large percentage of PI was brewed. In this particular parti-gyle equal quantities of all three beers were produced. But in others, up to half the volume was in the form of PI. 

1906 Drybrough PI
pale malt	8.50 lb	74.76%
flaked rice	1.00 lb	8.80%
flaked maize	0.67 lb	5.89%
No. 1 invert sugar	0.50 lb	4.40%
No. 2 invert sugar	0.67 lb	5.89%
Caramel 500 SRM	0.03 lb	0.26%
Fuggles 120 mins	0.75 oz
Fuggles 90 mins	0.75 oz
Goldings 30 mins	0.75 oz
Goldings dry hops	0.50 oz
OG	1051
FG	1018
ABV	4.37
Apparent attenuation	64.71%
IBU	28
SRM	7.5
Mash at	148º F
Sparge at	168º F
Boil time	120 minutes
pitching temp	61º F
Yeast	WLP028 Edinburgh Ale