roggae

Recipes 

does gravity rise as you boil the wort? like pre-boil OG versus post boil OG. is there a difference?

i only ask as i have recently begun taking readings. i have brewed what i thought was good beer for about a year and now i am finding i am missing my gravity by like .02-.04...'d think my crush was good(maltmill at LHBS). i am using a wort-hog converted cooler mash tun, a converted keg kettle, and a hurricane burner.

at a loss, but conted nonetheless...

roggae

Recipes 

is it at all feasible that i am getting like 50% eff? i mean i never knew what iwas getting, but now that my brewmate is all about #'s it seems this is what we are getting...!?!?!?!?

uwmgdman

Recipes 

Post your recipe and gravity calculations (include volume measurements) and it would be easy to calculate your efficiency. Is it possible you're only getting 50%, very possible if even one element of your process is out of whack.

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Production: 2013 Maker's Mark Bourbon Barrel Stout, Imperial IPA
Drinking: Belgian Dubbel, Black IPA, SemiCentennialT ryePA, 2011 Maker's Mark Bourbon Barrel Stout

Blender

Recipes 

We would have to have the recipe to supply an efficiency number. I think it is possible to get 50% efficiency but it depends on how you measure it. I prefer to measure the gravity before pitching the yeast, some go by the gravity before the boil.

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Gary

roggae

Recipes 

17 lbs maris otter
1.5 lbs melanoidin
1.0 lbs 60 L

simcoe hops at 60, 30, 15, 10, 1

mash at 150 for about 90-100 mins

boil 90 mins

any thoughts?

uwmgdman

Recipes 

What was the volume of the beer in the primary? 10 gallons? What was the OG of that wort in the primary?

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#######################
Production: 2013 Maker's Mark Bourbon Barrel Stout, Imperial IPA
Drinking: Belgian Dubbel, Black IPA, SemiCentennialT ryePA, 2011 Maker's Mark Bourbon Barrel Stout

roggae

Recipes 

never mind. i figured it out. thanks all!

knipknup

Recipes 

Please post what you found in case it helps someone else in the future. I'm curious...

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roggae

Recipes 

i took my OG post boil pre-pitch and i was in my target range. i took an OG of the first runnings and i was dead on. then i took a reading of the first and second runnings and i was waaaay under. i allowed wort to boil for 90 mins and the reading obtained was 1.085. so i was a little lower than i had hoped, but i was much closer than i had anticipated after the pre-boil gravity....

david_42

Recipes 

The gravity of each running decreases, there is less sugar left in the mash. Your first running should be 50% higher than your TG (adjusted for temperature), the second a little below, the third maybe half. The last running for batch sparging will be higher than the cutoff for fly sparging. When brewers made separate brews from each run, they made a barleywine, an ordinary and a small beer.

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