Isent it fun writing those numbers down, a tidey mathimatical equation,But remember Bruce, a GODESS with a frown wont give you the sap you are craving,,and for that Jones and his rule of 86, for Marvin and I that fromula has left us in shear frustration! We never come close to making 1 gallon from forty,,, With 2% sap its more like 50 to 1,,I am not sure where the sugar goes,,but its not in the drum..
Your mechanical production numbers add up just fine,,they might, as Russ suggested be a littel low,
but,
your taps on grabity are going to give you 13 gallons each? I dont think so. I think that # is far to high and I have for you a suggestion. Post a query on the tubing fourm and ask fellow traders what say-just guessing the average will be around 9 gallons a tap..last year on grabity I got just that.
On Hoit road this year I got just 3, see that is what can happen-thats why big companies stick with crops with a littel more pradictability-you will never see INTEL or CARGIL sappin!
As for vacuum 20 gal. a tap is well within reason,,last year I got 22 but that was a heck of a season,,,this years I averaged just 15.8,,I think I know why, I tapped too late,,but-I thought if I drilled too early I would just get a littel sap in my tanks then it would turn freezing-break all my plumbing, then I would be
........more later I gotta get the kids going........