Bokakob 2" under construction.

[rad14701]

The only difference that the air gap between the two slant plates makes is the amount of vapor speed increase that will be realized in that area... For example, with a .75" air gap you will not increase the vapor speed...

How did I establish this rationale...??? A 2" diameter column has an area of 3.14 square inches... A horizontal window 2" wide by .75" high has an area of 1.5 square inches... Roughly half that of the column, for a vapor increase of ~2x... Double the height from .75" to 1.5" and you are at 3 square inches, or virtually zero vapor speed increase... But wait...

Of course there is still a minor deviation from these figures as the vapor first heads around the plate, but these figures get use close enough for government work... I'd consider .75" to 1" to be about optimal for our needs as it's probably not worth getting into more complex geometric calculations given what little added benefit there would be to gain from such an exercise, but here goes, minus the equations which were done in my head...

When we consider that the plates cover roughly 1/2 the column area the figure of .75" is pretty much right on the money for a 2" column and 1" air gap would be good for a 3" column... With air gaps of these sizes the vapor speed will essentially remain the same from the time it hits the bottom plate until it passes above the top plate... There is no way to get around the 2x vapor speed increase due to the plate covering half of the column, but we can keep that speed increase at 2x instead of increasing it further...

Perhaps not the best place for this explanation, but here is is just the same...

[Kentucky shinner]

Looks to me like you have done a good job.. You I think will be very happy with your bok.. It makes some really good likker.
KS

[moodie007]

The only difference that the air gap between the two slant plates makes is the amount of vapor speed increase that will be realized in that area... For example, with a .75" air gap you will not increase the vapor speed...

How did I establish this rationale...??? A 2" diameter column has an area of 3.14 square inches... A horizontal window 2" wide by .75" high has an area of 1.5 square inches... Roughly half that of the column, for a vapor increase of ~2x... Double the height from .75" to 1.5" and you are at 3 square inches, or virtually zero vapor speed increase... But wait...

Of course there is still a minor deviation from these figures as the vapor first heads around the plate, but these figures get use close enough for government work... I'd consider .75" to 1" to be about optimal for our needs as it's probably not worth getting into more complex geometric calculations given what little added benefit there would be to gain from such an exercise, but here goes, minus the equations which were done in my head...

When we consider that the plates cover roughly 1/2 the column area the figure of .75" is pretty much right on the money for a 2" column and 1" air gap would be good for a 3" column... With air gaps of these sizes the vapor speed will essentially remain the same from the time it hits the bottom plate until it passes above the top plate... There is no way to get around the 2x vapor speed increase due to the plate covering half of the column, but we can keep that speed increase at 2x instead of increasing it further...

Perhaps not the best place for this explanation, but here is is just the same...

So what your saying is 19mm is all good LOL

Ive got a lot to learn I can see

[moodie007]

Added a Liebig to cool the product. I know its probably a bit long. If so ive made it in such away that the end cap easily can be unsoldered and slid off and the external tube shortened.

Excuse the mess on the bench LOL

[Kentucky shinner]

Looks like you did a very good job. Good feeling when you stand back and look at your work aint it. dont forget when you get ready to run that baby to insulate your column. It will really help you to stabilize your temp.
Good Work, she looks really good,
KS