SIBAP

[BasementExperiments]

Tried to rig up a foot pump today, not much luck so far. The water was just under a meter deep (big plastic garbage bin)

At first I just tried a garbage bag with a tube, I had to squeeze the bad to hard that it stretched and blew a small hole, I wasn't able to create enough pressure with a garbage bag.

I did test a 4 liter bottle, it was able to float a 5lb weight. 15lbs and it sunk, so somewhere around... 7-8 lbs I'd say it would start to sink, but not offical..

Is it easy enough to say that if I had a weight and put it on an air tight bag, the pressure would be 5lb?

Doesn't seem right but it SOUNDS right.

I tried blowing down the tube (small fishtank type tube) and was surprised at the pressure needed. However, it wasn't that difficult with a foot pump to do.

sorry, not much real scientific study in the backyard today, I had to do the tests between doing gardening for my wife and taking care of other house chores!   Tomorrow is another day!

[hartiberlin]

I tried blowing down the tube (small fishtank type tube) and was surprised at the pressure needed.

Exactly that is the hydrostatic paradoxon...

Keep trying, maybe you will find a way to use less pressure
or use a pulsing system, where only high pressure pulses
must be applied, but the average pressure over one cycle is
still low enough to get this system to overunity...
Good luck.

Regards, Stefan.