My observations on how successfull the seperation with this setup is below.
Allow me to shortly go over the process for the sake of some of our friends who may not be familiar with it.
As I am feeding the coil/pot with wash from below, it gradually becomes hotter while going up and at the time it reaches the finger, wash temperature becomes hot enough to vapourize heads and hearts but cold enough for tails and water and they remain liquid.
Keeping that flow/feeding rate for wash that is going in to the coil constant, and as the heat coming from below is constant, the temperature of the wash at the finger will be constant also. At that state I get an equilibrium. And if the constants remain constant, the still will run continuosly at that state, vapourising heads and hearts and keeping tails and water as liquid continuously.
As heads and hearts are vapour now, they go up filling the the top column. As the temperature along the column goes from hot to cold moving to the top, and it is coldest at the top, the heads should stay there on top of hearts and as we are feeding the column continously with heads+hearts as vapour, finaly there should be enough heads accumulation in the globe and will be pushed out from the top exit continuously.
As the column is stacked up this way (heads stacking on top of hearts and hearts accumulate below them), hearts will exit from the arm to the condenser.
This takes a little while to stabilize and work like this continuously.
However some tails may also vapourise. But as there will be less amount of tails as vapour than heads and hearts combined, and as the column is being stacked on top with hearts and heads, the tails trying to join the que will face two problems to stay as vapour. The problem of space and temperature. There will be less space on top and the temperature will not be hot enough for them and they will not be able to go up high. Hopefully they get refluxed and they will join the backset as liquid and go down.
Does this work? and how successfull it is?
The definitive answer could come from having a lab test the samples coming out from each exit. I did not have the opportunity to do so yet. So I don't have any scientific proof.
So, what tools do I have to observe? Taste, smell, and as a plus, sight.
As I was using glass equipment all the time, I was able to see how vapour looks on glass during each phase when using my pot still. You know the sight of water vapour on glass. I see that happening when tails start coming. It starts with a few patches here and there and finally invading everywhere, if I don't end my run before. During heads, the column looks perfectly clean and shiny. During hearts, its all shiny too, but you can see a little phase change from vapour to liquid in the arm/bridge. It happens as little drops at the start of the arm but increases and becomes lines alongside its length up to the condenser.
Using these observations, what I see while operating this still is this.
If I don't see any water vapour anywhere up the column, I think there are no tails coming up. This happens when the thermometer at the top shows 74-75C or less. I also see some little drops alongside the arm. Which is similar to what I see during hearts run with my pot still. If I dont see any drops then I know that the temperature of the wash at the finger is not hot enough to vapourise all the hearts and I am loosing some product.
However, if the temperature at the top approaches 76C then I see little patches of water vapour around the hole where the arm connects to the column. Interestingly enough it is just around the hole, not inside. I also see some at the level of the finger.
If the temperature nears 77C then I see more patches of water vapour here and there and the hight of it around the finger rises. If the temperature keeps rising then there are more.
These are my visual observations. Do they mean something? I am positive.
When I take samples of product during different temperatures at the top, dilute and taste, I can taste tails from the samples taken at 76C or above. below 75-74C it is very clean and nice. I did not run below 72C as I am losing product then. I did not feel heads from these samples.
When I smell the heads jar, it smells like you know how. I don't taste them.
I do another test which I read somewhere. A moonshiners way. I take one or two drops on a spoon and light it with a lighter (away from the still and in a dark corner) and look at the flame. According to what I read, hearts flame is blue, heads are yellow, and if there is lead contamination you see red.
I never saw any red. and haven't seen any yellow from the drops from the condenser. Only a very nice blue flame. However, when I dip my spoon in the heads jar and then light it, I always see yellow sparklings.
All these tell me that there is some success. Howmuch and how accurate? Only lab tests can tell.
I haven't tried running these low wines in a ruflux setup yet. That will tell me more when I do in the future.
I like to experiment and learn. I haven't ran out of experiments yet.
I hope this sums up my observations on seperation with this still. I respect all your judgements.
Next, I will try to share my thoughts on what practical ends we might get from this setup.