The inflammable nature of gas or petroleum products is modified by encapsulating the gas/liquid such as acetylene,HHO,or JP4
within a foamor water/oil emulsion or multiple emulsion. I was trying to track down an old NIST publication reference by a shout out
to one of my research gurus.
The two youtube references show and contrast the varied type rate of ignition between foam encapsulated inflammable gases
and somewhat explosive nature of HHO foam. The inclusion of the oxidizer within foam matrix increases the rate of burn.
whereas,in the methane foam ,the rate of combustion methane is more gradual due to the lack of oxygen dispersed within the
methane foam matrix. The Mythbusters telly episode shows the slower rate of combustion of a methane foam tower.
Do not attempt with HHO for this quantity of foam. I was shocked to see the experimenter IronDMax hold it in his hand and
ignite it. Had he been foolish enough to have tightly cupped or confined a larger amount it his hands and ignited it,
he might well be counting up to 4 on
both hands!
The localized overpressure and sound resulting from the ignition of ah HHO tower the size of the methane tower in a
very confined or restricted space would likely result in deafness and possible lethal or severe internal organ rupture
in extreme cases
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See what 8 liters sounds like
http://www.youtube.com/watch?v=NormCh8jQTg. or
http://www.youtube.com/watch?v=1tbbDlxZiyE Outside and
fifty feet away it was loud. The foam methane tower had an estimated 15,000 cubic inches (uncompressed gas) or over 240 liters--30 times
the amount of gas that our UAW friend used.
http://www.youtube.com/watch?v=2lyvvH76A0w&feature=endscreen&NR=1At least he was not close and had the good sense to use eye and ear protection.
The 8 miles per second
claim works out to over 41,000 fps, much higher than Stan Meyers figures. The increase in temperature was
interesting. Was it heat transfer from the explosion or a increase in the temperature of the black chair which now had a portion exposed to the sun
and subject to solar insolation? The use of a white chair might answer this.
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" It may have some application in the construction, mining and now , gas drilling industry as well as limited DOD uses, but as an assist
to hydraulic metal deformation, it may have shown some promise .Although, apparently other methods ultimately proved to be more useful and
safer for that application, it apparently proved most successful when the foam was placed on top of water within a tube and the tube subsequently
placed in a slightly larger die. The rapid change in the volume of gas would press down (or pull up )and hydraulically press the tube against the die
similar to what is known in home reloading circles as "fireforming" a cartridge."
q4sandia24: ask aberdeengreen if wind dispersal problems or flashburn and permanent auditory damage were the reasons for the termination
of the program. What kind of person "volunteers" for testing at ARL? Not me!!
a4sandia24: The image is blurry but the photogrammetrics put it at 8 metres across and 12 metres tall and foam bubble size was much larger. The color
of one of the tanks to right of one of the foam generators was red with red dot shoulder diamond which may indicate hydrogen supplementation to
the HHO mix(which makes sense for the LTA characteristics.) A larger bubble size would reduce the gas to foam matrix weight ratio further
enhancing in LTA lift .
One of the other tanks has the newer EU two color markings As to its position, it was floating about 10 metres above the roof of the test vehicle
The uneven top edge of the foam and tilt may indicate the effects of wind shear. The string like drips are probably the drainage through the
foam and the mammatus pouches indicating a generally higher foam density at the bottom. The shredding at the top may also be an indication
of greater instabilty at the upper levels due to film drainage. The three steering tethers pantone comes back OD ( milspec 550 cord?) The lighter
circular areas are probably embedded weather balloons which function as attachment points. There were no identifiable flora but several of the
foreground rocks had flat faces. (One was like a triangular column which is indicative of long term windblown sand) AZ/NM/ARL?
