I thought the guy was giving me a line also until I watched him do it, I then asked my lp supplier how or what kind of trick it was that the guy was doing and he explained it to me like this, lp is a gas and also a liquid, it keeps making more gas until the liquid is gone, and if you only had to do about 40-50 lbs of pressure if you hooked the hose up it should eventually build that for pressure and inflate the tire, if its warm out which it was at the time it was demonstrated to me, it was the dead of summer and almost 90 degrees, also if its hot out and you only had a small 1/2 drive impact my supplier told me it was no trick it would work if you had guts enough to attempt it, you wouldn't have a lot of pressure but enough to make it work, I again didn't believe my supplier so I contacted a tank manufacturer and asked them about pressures and temperatures and such and they gave me the same story and when they asked why I wanted to know I told them and after a long pause on the phone they said it was doable and maybe not to attempt it. I've seen the either to seat the bead on tires done many times and I thought that was dangerous enough and have never done that one either, I've never done the lp thing personally but seen it done several times by the same person and know its possible and also the lp supplier and tank manufacturer have told me its possible but I've never been gutsy/dumb enough to try it myself, but it has to be hot out not cold or snowy to make it work, also the larger the tank the quicker it will fill the tire or have reserve air capacity, the person doing it told me that as well. The guy originally had a gas pickup converted to lp with a large tank in the back is where he originally got the idea from is what he told me and that would have been around 80-120 gallon tank and he just tapped into the line before the pressure reducing regulator so he had full tank volume and pressure and said it just wait it out and it would fill the tire nicely. He's always carried lp tanks, the small ones ever since in every vehicle he's ever had and this is what he uses it for, his tires when you take them off always smell of lp gas and how he's never had an exposion I'll never know, I never dreamed it was possible to be done and also it gives a person something to think about before I'd ever weld on any rims, even if they used either to seat the bead, theres still the smell left behind and I'd think twice before ever attempting to add heat to remove any lug nuts on any truck.
I"ve also seen oxygen cylinders used to inflate tires, I worked for a place years back that had a hose hooked to their 02 tank off the regulator and when they had no air compressor available they used the compressed air off of the tank instead, seen that one many times as well, I always stood back and just watched that fiasco take place as well, I was just an employee and didn't say much, seen tires inflated with C02 out of the wire welder tanks and all sorts of weird stuff, I keep that in mind when I buy anything used with rubber tires on it, you never know what its been inflated with to get by, 20 years ago I never would have thought anyone would use anything but compressed air to inflate tires but over the years I"ve been proven wrong.
It was a nice video but I"ve never seen data of how hot the air gets in a tire on a summer day running down the interstate at 70 miles per hour when a tire blows out from the heat or a cap lets loose and blows, I"ve had tires get so hot they literally created melted balls of small rubber inside, the old tube tires were the worst, even had those start on fire before while driving because of being too low of pressure or going flat while driving so I know its gotta be hot to literally start them on fire.
