First PEGASUS EXPERIMENT

[The Seeker]

world wide fittings is one of our main suppliers, they have a website  besides the mild steel tubing it is also available in stainless steel, aluminum, and high carbon steel; the steel ferrules on the fittings are routinely under very high pressure and unless you generate enough heat to melt the tubing( which should be vastly higher than the boiling point of the mercury) the ferrules and fittings would be the lesser of my worries; the fittings are forged, not cast or draw;

http://www.worldwidefittings.com/


seeker

[robomont]

because mercury gas is deadly.i dont want to take any chances.

working in air conditioning i found that any time there was a leak in a system.99% of the time it was a connection of fittings.
not to say they want work but safety is number one.

i dont want to kill anybody.just make a big bang .
one way or another.lol.

the world wide fittings site didnt have a  price list.just sales email.

do you have a general idea of what tubing would cost?

i think a 1000 degrees F.will probly get the job done.since 648 is boiling point.

i may have to go with a larger heat source like a rosebud w propane.

[The Seeker]

I understand your concerns, I have had an a/c license for freon since the early 90's; I will see about getting a copy of our price list Monday...
but if you really think about it, this functions on the same basic principal as the old gas refrigerators from the 50's, didn't have a compressor, used heat instead...


I would have a manifold somewhere in the system(need one to pull a vacuum anyway) so establishing system integrity and ability to hold 25-30" of vacuum for the mercury should satisfy leak concerns...


seeker

[robomont]

got my card in the late nineties.
yea im going to put the mercury in and then weld up last connection.
a tap will be welded in to pull a vacuum with.then the tap will be crimped just in case the schrader valve fails from heat.

[robomont]

and yes ,get me the price list.thankyou seeker

[PLAYSWITHMACHINES]

Seeker, here is a quick sketch of the Tesla pump i was referring to.
Tesla used a diaphragm pump i believe, but the principle is the same.



As you can see it's dead easy, the only part that will wear out are the springs, so you replace them with a pin behind the ball bearings. The cylinder can be ceramic or teflon lined etc and there are 2 sets of 'o' rings behind the piston. You don't even need the hinges either, just use an H core & have valves on each side etc etc...

I built something like this when i was a kid

It works fine at 50-60 Hz, but they become mega pumps at higher frequencies, i think Tesla used a pump like this running at 3000 cycles per second (3KHz) to liquefy air for his big transformers.

Funny it's not in Wiki
ETA; maybe it's listed under 'espresso machines' LOL

[robomont]

i tthought the tesla pump was a finless turbine.

[PLAYSWITHMACHINES]

Yes, THAT one is, but Mr. T designed a whole lot of mechanical stuff, including (something like) the one shown here.
He also designed the vortex one-way valve which has no moving parts at all, something we could use in our design

Ask Amaterasu, she found it

http://blog.makezine.com/2012/01/05/the-tesla-valve-one-way-flow-with-no-moving-parts/

[robomont]

ive decided to go with two freon tanks as top and bottom ball or maybe propane tanks since they are round.i can get freon tanks for free and polish them so there is no arching from high voltage.

i also found mercury.triple distilled for 100$ a half lb.

[PLAYSWITHMACHINES]

I stil got my old freon stuff too, & 5 liters of R22 which i'm keeping to freeze my HF projects

Mercury can store a LOT of energy, in this case millions of joules, also as heat.
Whatever your pressure values are, double them.
Flanges are indeed useless, they can only handle 150 or 300 PSI (50 bar) that's the standard ones. Higher ones are available up to 14,000 PSI but they are THICK so it's best to weld them, preferably TIG & a good dose of argon

And make your ports & valves BIG, you may need to dump a large volume of gas in a short time, so its about volume as well as pressure.

Who'se backyard are we going to test it in?

[robomont]

thankyou for the math.im gonna go with a half pound of mercury unless someone on here donates theres.lol.hundred dollars plus shipping is what i found on the net.i may only build it four foot high.right now im waiting on the price on the tubing.i dont know how much mercury i really need though.maybe a tablespoon.lets say the volume of the thing is fourteen cubic feet.how much mercury in the plasma state would that be.
maybe less cubic feet.just guestimating right now.

[robomont]

at worst my backyard but i have a massive strip coal mine about a mile from me so i could maybe do it there.im trying to keep the local audience to a minumum.out of site out of mind.ill let youtube do the talking for us.

seeker is suppose to get me a price on the tubing.just a general idea.

[PLAYSWITHMACHINES]

I tried some rough calcs based on that volume & the amount it is likely to expand.
I came out at 2.7 Kg or about 5 pounds

...but i could be way out on that

[robomont]

five lbs of mercury.well then we need to get more money or reduce volume.right now i have three hundred budgeted.deum 100.thor 100.me 100.
scheduled for assembly around july 4th.
so fourteen gallons divided by five equals three gallons.so the volume needs to be way lower.does that sound correct if we go with 1/2lb. of mercury?could you also show the math if thats possible so that it can be reviewed.

[PLAYSWITHMACHINES]

I think i did something like, it would expand 2000 times at boiling point, and 6,000 times after that. The density is about 13 1/2 times that of water so i multiplied my volume by that much to account for the density.
(ETA: I meant 'mass' not 'volume' sorry)
It all depends on how hot you make it, what kind of pressure this thing can take etc. OK you need a certain volume of mercury vapour at X degrees and Y pressure.
If you go for the max expansion of 2000 then you only need 1 1/2 pounds.

I think

Hell, you can always add more later, it would be safer to start with as little as possible & go as hot as you can. If we see an effect, we can drum up some cash & get more mercury in there.

Just my 2 cents