wow thats clever:) damn you i just bought a new $500 vacuum pump!
Surface tention viscosity and out side barometric presure. The trigger hose is 4mm. Eg. If you put a small hole in the bottom of a sealed solid container to form a drip the size of the drip is determined by the viscosity of the medium and the weight also the barametric presure at the time outside the container. In this example the medium will stay suspended because the hose is to small for a drip to form so keaping the trigger hose small alows the water to suspend once pressure equalizes betwean the vacuum and the viscosity and weight of the medium ( in this example h2o ).
Im not getting in to any more scientific debate im no scientists history has shown what happens if you try tell the aristocracy the world’s a sphere and not flat and all jokes aside ill be adding another drum and ill try it with the fins and poast the results however wacky / satirical.
That’s just plain cruel! Now I’m going to have that stupid song in my head all day!
Nice build. I see a all agave, hemp hand carved, vac bagged solar powered, off the grid build. Call it “if I was stuck on a desert island, build”.
You just need a good glue alternative?
That is a really cool idea, thanks for sharing. Just wondering, what’s ribish? Is that trash a frog makes? 
Ribish is rubish / sorry i have an accent ( thanks for the heads up on the title )
Im sure someone on a desert island already is but we won’t know till the island population gets big enough to attract a decent Internet provider
Im fairly sure what you are talking about is called header presure their is header presure as you suggested but not in relation to the vacuum in the bag its notat all causing the sucktion. In fact its a resistance of the water as it drains from the drum. That resistance or header presure / column presure is only active x x4mm of the outlet this small amount of presure pluss atmospheric presure pushing on the otlet water needs to be deducted from the weight capacity of the container so capacity minus atmospheric presure and header presure as per relivant to 4mm diameter will give you the suction force generated in the bag. Retrospective the force on the spunge or item in the bag can diminish depending on the size of the item the smaller the item the more vacuum is applied per square cantermeter or inch. Thanks for your interest i wouldn’t have investigated these dynamics otherwise.
the pipe drain will only suck at the weight of volume of water,
Just because the same volume of water is alot taller than the drum dosnt make its weight any more than it’s capacity volume of water.
Resistance of header still apply’s as will atmospheric resiatanc
So in actual fact a tall pipe shape would increase header persure but would cause equal resistance in the opposite direction vaas decreasing the suction in the bag
If you were to use a container of equal dimension this would be the only way to enhance the suction of what’s already there created by the barrel or drum
This thread is awesome. I doubt I would ever attempt something like this, but it’s entertaining as hell to watch.
I’m having an awesome time it’s been great fun I’m only hoping that I’ve done everything right so the fins turn out good. It would be a waste of carbon Kevlar fiber I’m not concerned about the vacuum not being good enough for the application that thing hardly cost me anything just my time and that was enjoyable
Although I’m very certain at this stage that things should go smoothly