On Fri, 15 Dec 2017 14:22:41 -0500, rickman > wrote:

>Arthur Woodwrote on 12/15/2017 12:46 PM:
>> trader_4 wrote:
>>
>>>> https://www.amazon.com/gp/product/B01N2XYORX
>>> That's what I was telling him about in the other thread here, that I've
>>> heard people have used one of those disco smoke gizmos. See Hpressure but it is s you
>>> should be able to rig up something to pipe it in. Plus, with a boom box
>>> and some songs, you can have a business at parties and weddings as a DJ.
>>
>> I thank you for coming to my aid, and I apologize for not having "believed"
>> in your previous suggestion. (See below why.)
>>


They don't use a fan. They use a liquid pump to squirt the fluid
through the heater, which vapourizes , producing steam pressure. No
fan. I have onem and I've had it apart. The poressure is reasonable,
but I'd say less than 5 psi. Commercial smokemachiners run somewhere
around 1 - 2 PSI maximum.

The only olproblem I see is getting the HOT smoke (really more like
steam) into the fuel system you are testing. It will melt a plastic
hose attached to the output - so you need an adapter that acts as a
cooler as well - which WILL reduce the pressure somewhat.


>> If so, I don't see why it's not perfect for the task - if it generates the
>> smoke at enough of a pressure to get us a couple of psi for a long period
>> of time. It has to be in the goldilocks range of a few psi (maybe 2 to 4
>> psi?).
>
>How did you come up with that number?
>
>
>> The output is 2000 CFM, which seems like a lot.
>> Is there a way to *convert* that to PSI?
>
>Not really. Most likely they are using a fan designed to move air against
>very little pressure, like the "muffin" fans in a PC. They will move a
>decent volume of air at very low pressure, but the air flow falls off very
>quickly as the pressure increases. The only way to know for sure is to get
>the spec sheet of the fan.
>
>Here is a spec sheet of a typical DC cooling fan.
\


>
>http://www.nmbtc.com/content/pdfs/08015JE.pdf
>
>Notice the flow goes to zero at pressures around 0.1 inches of H2O. Your 2
>psi would be 55 inches of H2O.
>
>Maybe they are using a different type of fan, but I don't think y

ou are
>going to get 2 psi from one of these machines. Maybe you could rig your
>compressor to it to boost the pressure.
>
>
>> The "wired control" might even be useful for one-man operation while
>> debugging a vaccum leak on an engine.
>>
>> The machine holds 0.5 liters (1/8 gallon) where a gallon of the fog juice
>> (propylene glycol perhaps?) is $20 which means the machine, over time, is
>> cheaper than the fluid used to make the smoke!
>> <https://www.amazon.com/Gallon-Great-Party-Fog-Machines/dp/B005UQPPK4/ref=pd_sim_267_1/135-2052768-3676406>
>>
>> So I do agree, for forty something bucks, it's about the same cost as what
>> it cost me to make that tin-can smoke machine that didn't work.
>> https://www.turboimagehost.com/p/368...moke1.jpg.html
>
>The same cost for something that also isn't likely to work without
>modification.
>
>> Any idea how to calculate the PSI out from the 2000CFM spec?
>
>See above...