Re: Got a problem, feeling abit dumb!
- --- In email@example.com, "mavnkaf" <mavnkaf@...> wrote:
> --- In firstname.lastname@example.org, "Sherman" <pintoshine@>
> > ok now I got it. 4500g/23L = 196g/l
> > according to the chart found here
> > http://www.brsquared.org/wine/CalcInfo/HydSugAl.htm
> > this is 1.075, 18.1 brix between 9.5 and 10.5 alcohol potential.
> > Your sg was 1.085 which is 11 to 12% by the chart. Maybe you
> > 20 liters of wash which gives 225g/l.
> > Another way to figure it is theoretic yield of sugar is 51% by
> > according to the stoichiometry.
> > 4.5kg * .51 = 2.295kg etoh is 779g/l
> > so this is 2.95L etoh in 23 liters which is 2.95/23 = 12.8%
> > max. One can usually figure 90% efficiency which give 11.5%. All
> > numbers add up.the
> I have finally worked out what I was doing wrong, I was reading
> hydrometer wrong. Since I don't get many washs under SG 1.00, IYup. I knew you'd get there eventually. :)
> did'nt know how to express the number to apply it to the formula.
> So, og 1.o85 - fg 0.990 = 0.095 * 131 = 12.445 %, right? Thanks
Here's another little tip. FG never goes below 0.985, I don't care
how good the ferment was. That is DRY (ie, no residual sugars).
> >Hi Harry, thanks for your reply, I did'nt know about 0.985 is as low
> > I have finally worked out what I was doing wrong, I was reading
> > hydrometer wrong. Since I don't get many washs under SG 1.00, I
> > did'nt know how to express the number to apply it to the formula.
> > So, og 1.o85 - fg 0.990 = 0.095 * 131 = 12.445 %, right? Thanks
> > Cheers
> > Marc
> Yup. I knew you'd get there eventually. :)
> Here's another little tip. FG never goes below 0.985, I don't care
> how good the ferment was. That is DRY (ie, no residual sugars).
> regards Harry
it would go. I think my reading of 0.990 is still in error still
because I measured it before I let the solids drop. Last night I put
200 ml in the fridge and only a few minutes ago I remembered why I
did it, to test it with out sediment. It did'nt change much, 0.991 @
20 C, so I got about 12.314%. I'm happy with that. I have found
using a heated bath setup is bring some consistency to my fermenting,
keeping consistent temps have got to better.
- I'm coming in late on the discussion. Missed two whole
days... That like a life time in this group. Ther
aree a heap of replies but here's a short cut for
calculation alcohol %
Take out decimals.
Start 1085 - 900 = 185 / 7.36 = 25.1% alcohol
Divide the difference of start & Final by 7.36! Voila!
--- mavnkaf <mavnkaf@...> wrote:
> Hi group, I keep doing the maths on this and it____________________________________________________________________________________
> does not work out
> right??! I have 2 fermenters(23L) in a tub bath @
> 28 C, so the temps
> have been very good through the last 7 days. Now it
> has finished and
> come up will these numbers.
> OG = 1.085
> FG = 0.900
> SO what will the % be? Have some figurs but it
> does not add up, in my
> Harry's program tell's me it's around 24% but it
> can't right. It's the
> DWWG recipe with 4.5 kg of sugar and one table spoon
> of citric acid and
> the wheatgrem, 500 gr.
> Ned Kelly's Air Force
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