Heron's Fountain

[johnny874]

  here's a drawing of my version of Herons Fountain.
Because the fill tube has a larger diameter, it can over fill a reservoir beneath it into another reservoir where the discharge tube is located. This barrier would prevent the 2 static heads from balancing themselves which they would do.
If anyone bothers to build Heron's fountain, you'll find out that the discharge tube as in the video is a smaller static head. And it's the mass of the static head that generates the air pressure for pumping out the reservoir where the outlet tube is located.
The top view is looking straight down at it. should give everyone a decent idea of how a simple pmm might be built.

[TinselKoala]

Well, I was gonna wait until Bill posted his video of his fountain, but after that last set of drawings from johnny874 I feel rather obligated to point out that I published the video below on YouTube on August 25th.
http://www.youtube.com/watch?v=AlLYD4CSJLU

[johnny874]

Well, I was gonna wait until Bill posted his video of his fountain, but after that last set of drawings from johnny874 I feel rather obligated to point out that I published the video below on YouTube on August 25th.
http://www.youtube.com/watch?v=AlLYD4CSJLU

  TK,
the reason the flow slowed so much when you put the straw on the discharge tube is because the weight of the static head increased. but with what I drew, only one chamber is necessary because of a barrier which can be over flowed. that is what would allow for it possibly going perpetual.
with 2 similar static heads in something like this, 1 inch diameter is about .78 cubic inches per inch and with a 1/2 inch line, it's about 1/5th cubic inch per inch. it's the weight of the staic head that creates the air pressure. The inlet tube would have about 4 times the force.
What  might be missed is that air pressure can slow the inlet of water to keep pace with what is being discharged. It would find a balance at some point. And is always possible that some pre pressurization might be required to limit how much water it takes to generate air pressure.
edited to add; if the outlet tube was taller than with the straw, flow would probably reverse itself.

[Pirate88179]

TK and all:

I have old Johnny on ignore and can't see what he is posting...I am sure I am not missing much.  Ignore is such a great feature.

Just completed putting my fountain back together and will test it...and then film it tonight.  I did a slight mod to the output part which I just glued together since I got home from work.  I found an ultraviolet led but the output is not really enough to get the full effect so....I will buy a black light bulb and make another video another day using that....tonight's will just be the fountain.

Bill

[gadgetmall]

Love it Bill . It's nice to see you and other friendlies doing some more research on stuff . I Love running water sound . so soothing . I have to get some rest now  but i will check in tomorrow for another exciting adventure IN ... Ou.com

Al