How Do All ,
Here`s today`s offering ; My interpretation of a possible recipe for Maclay & Co`s Oat Malt Pale Ale .
The recipe is inspired by information contained in the 1909 - 1912 Brewing Book , Part of the Maclay`s Collection ( M ), from the Internationally imoportant Scottish Brewing Archive;
The S B A is cared for by the team at The University of Glasgow Special Collections & Archives on Thurso St who were of great assistance on my last visit ; Thaks team ,
I really appreciate your help with my research into Scotland`s beery past .
This recipe C Edd Mather 2023
ANY AND ALL COMMERCIAL PRODUCTION RIGHTS RESERVED TO
Maclay & Co Ltd and their successors in title
This recipe for 30.230 Wort Litres to Copper @ 1.032.75 , 80 % Mash Efficiency Assumed
Maximum WORT Volume in Copper @ 30.230 Wort Litres AT COLLECTION
Maclay & Co Ltd
Thistle Brewery
East Vennel
Alloa
Clackmannanshire
Scotland
Label Photo from The Brewery History Society Web Page on Maclay`s |
OAT MALT PALE ALE
Ca 1909
Original Gravity : 1.044 Bottling Gravity : 1.008.75 Final Gravity : 1.006
I B U : 32 A B V : 5.3 %
MALTS & ADJUNCTS
U K & Ireland
Crafty Maltsters : 37.75 % Scottish Annat = 1.030 Kg
17.5 % Pop`s Pale Ale = 0.510 Kg ( Pale Ale @ 6.5 ebc )
Warminster Malt 3.3 % Mild Ale Malt = 0.095 Kg
Crisp Malt 3.5 % Chevalier = 0.100 Kg
French & Jupps 7.25 % Amber Malt = 0.235 Kg
Simpson`s Malt 35.7 % Malted Oats = 1.360 Kg
Australia
Barrett - Burston Malt 20.58 % Vic Ale Malt = 0.600 Kg
7.25 % Amber Malt = 0.235 Kg
Voyager Craft Malt 3.5 % Veloria Vienna = 0.100 Kg
35.7 % Yarran Oat Malt = 1.360 Kg
35.75 % Veloria Schooner = 1.040 Kg
N B : ADD 0.200 Kg Oat Huske / Hulls to the grist ON ALL TYPES
MASHING
Use a Pale Ale Liquor and treat as for Stout Brewing
Thoroughly pre warm the Mash Tun to 95 c - 10 Minutes before mashing in , ENSURE the Liquor is 1.5 " ABOVE the Plates / Filter Bed
1 St Mash Heat : 66 c At 0 - + 90 Minutes = 10.500 Litres
2 Nd Mash Heat : 67 c At + 90 - + 120 Minutes = 4.000 Litres
At 120 Minutes , Slowly open the mash tun valve and return any turbid / cloudy 1 St Runnings OVER the mash until CONSISTENTLY Clear & Bright ; ONLY THEN ALLOW TO THE COPPER .
SPARGING
Sparge at Clear Wort to the Copper + 10 Minutes at 82 - 76 - 72 - 68 c = 18.000 Litres , At a Runnings gravity of 1.003 , STOP TAPS and Collect Wort in Copper .
COLLECTION & SUGAR ADDITION
At Collection in Copper , ADD LIQUOR to the Copper , Reducing the Gravity to 1.023.25 ,
ON 30.230 Wort Litres IN COPPER @ Let Off - X Minutes , THEN ADD SUGARS
1.009.5 Golden Cane Sugar @ 21.6 % = 0.750 Kg
CONDENSE TO 30.000 Wort Litres IN COPPER @ 1.033 AT LET OFF - 105 Minutes
NB : Remove any Scum / Detritus floating on the Wort Surface BEFORE L/Off -105 Mins
COPPER
A 1 3/4 Hour Boil ON HOPS , 1 St Hops at Let Off - 105 Minutes ,At Let Off - 70 Mins + 2 Nd Hops .
At Let Off - 40 Minutes ON 24.220 Wort Litres in Copper , ADD 0.785 Litres of LIQUOR , Reducing the Copper Gravity to 1.038.75 ON 25.005 Wort Litres .At Let Off - 30 Minutes , ADD the 3 Rd Hop Charge and at Let Off - 12 Minutes , ADD the Copper Fiunings and at Let Off ,
STAND 10 Mins , Recirculate for 5 - 10 Minutes , then STAND 1/2 Hour after Recirculation
BEFORE COOLING A S A P to Pitching Heat .
HOPS
1 St Hop Charge : To 30.000 Wort Litres @ 1.033
14 IBU Fuggles @ 5.5 % a/a = 22.5 g
2 Nd Hop Charge : To 26.360 Wort Litres @ 1.037
5 IBU Goldings @ 6 % a/a = 7 g
7 IBU French Fuggles @ 4.2 % a/a = 13 g
3 Rd Hop Charge : To 24.200 Wort Litres @ 1.040
6 IBU Hallertau Heresbrucker @ 3.5 % a/a = 13 g
YEAST
Pitch with 74 g Weight of a LIVE YEAST @ 15 c
ATTENUATION
DAY Hour Heat Gravity REMARKS
1 P 15 1.044
2 M 15.5 1.042 DROP to 2 Nd F V = 21.400 Wort Litres
E 19 1.032
3 M 19.5 1.027
E 16 1.018
4 M 15 1.013.75
5 M 13.5 1.013.25
6 E 12.5 1.013
7 M 12.5 1.013 SEND to BOTTLING C . V
STAND : 1 Week at 12 - 13 c Then vent Excess C O 2 and ReSeal .
CELLAR : At 8 - 6 c UNTIL AT 1.009.5 , Then STILLAGE and allow to 12 c
STILLAGE : 12 c 2 WEEKS then FULLY VENT and allow to 14 c
BOTTLING : Bright & Clear AT 1.008.75 - 1.008.5 then STAND 1 Week @ 13 c
CELLAR : 2 Months at 10 c then stand 1 week at 12 c BEFORE Q . C
Cheers All and Happy Brewing ,
Edd
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