In a way, it is totally typical of what went on in the war. Because the drop in gravity - just 5º over the whole period - is quite a bit less than usual. Though the gravity did fall lower: to 1039.7º in 1942. But, rather oddly, increased again early in 1943 to 1042.5º. And stayed at that level for the remainder of the war.
To make changes easier to spot, I’ve highlighted them in red
There are relatively few changes in gravity. But loads in the hopping rate. Which kicked off the war at 8 lbs per quarter (336 lbs) of malt. Dropping to 7 lbs in May 1940, then just over 5 lbs in May 1941 and 4.75 lbs in July of the same year. That’s quite a fall.
Though the rate did quickly bounce back to 5 lbs per quarter. Over the next couple of years the rate varied between 4.5 lbs and 6 lbs per quarter. Which I think is a reflection of variations in the supply of hops.
| Youngs PA 1939 - 1945 | |||||||
| Date | Year | OG | FG | ABV | App. Atten-uation | lbs hops/ qtr | hops lb/brl |
| 27th Jul | 1939 | 1047.6 | 1013.3 | 4.54 | 72.09% | 7.98 | 1.50 |
| 22nd May | 1940 | 1047.0 | 1013.3 | 4.46 | 71.71% | 7.00 | 1.29 |
| 1st May | 1941 | 1043.0 | 1010.5 | 4.30 | 75.52% | 5.14 | 0.83 |
| 3rd Jul | 1941 | 1043.0 | 1008.3 | 4.59 | 80.67% | 4.79 | 0.80 |
| 8th Jul | 1941 | 1043.0 | 1010.0 | 4.37 | 76.81% | 5.04 | 0.85 |
| 23rd Oct | 1941 | 1042.4 | 1013.9 | 3.78 | 67.33% | 5.09 | 0.85 |
| 7th May | 1942 | 1040.0 | 1010.5 | 3.90 | 73.69% | 4.48 | 0.72 |
| 9th Jul | 1942 | 1039.7 | 1012.2 | 3.64 | 69.30% | 5.46 | 0.87 |
| 20th Oct | 1942 | 1039.9 | 1011.1 | 3.81 | 72.23% | 4.52 | 0.73 |
| 30th Apr | 1943 | 1042.5 | 1014.4 | 3.72 | 66.11% | 4.89 | 0.82 |
| 20th Jul | 1943 | 1042.3 | 1011.1 | 4.13 | 73.81% | 5.46 | 0.95 |
| 1st May | 1944 | 1042.5 | 1011.1 | 4.16 | 73.93% | 5.56 | 0.93 |
| 8th May | 1944 | 1042.7 | 1011.1 | 4.18 | 74.05% | 6.00 | 0.99 |
| 19th Oct | 1944 | 1042.8 | 1011.1 | 4.20 | 74.11% | 5.46 | 0.93 |
| 8th May | 1945 | 1042.8 | 1008.9 | 4.49 | 79.29% | 5.41 | 0.94 |
| 3rd Jul | 1945 | 1042.5 | 1011.1 | 4.16 | 73.93% | 4.85 | 0.87 |
| 12th Jul | 1945 | 1042.8 | 1011.1 | 4.20 | 74.11% | 4.94 | 0.86 |
| Sources: | |||||||
| Young's brewing records held at Battersea Library, document numbers YO/RE/1/8 YO/RE/1/9 YO/RE/1/10, YO/RE/1/11, YO/RE/1/12, YO/RE/1/13 and YO/RE/1/14. | |||||||

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