Air Bag Jack

Air compressors deliver small volumes but at high pressure. Exhaust pipes 'exhuast' large volumes but at low pressures. If you use a air compressor it would take forever to blow up.

That's why you use a blower pump to inflate lilo's, beach balls, etc.
That's why you use a air compressor to inflate tyres..its all to do with pressure.

Cheers.
Lyndon.
Immaculate Discovery Td5.

Wonder what feedback users of the Bushranger X-Jack would give about using a compressor to inflate them - it's designed for either exhaust or a compressor.

Just as a guestimate, if the X-Jack is 75cm high and 75cm in diameter, it's about 330L in volume - the Bushranger Max-Air is rated at 50Lpm. That's about 6.5-7 minutes to inflate from empty.

How long does one take to inflate using an exhaust?

How long does one take to inflate using an exhaust?

probably only a few seconds from the 6.2l V8 diesel engine in my troopy.

I do have an air jack somewhere stashed away, though I think its smaller than the one mentioned above. I will dig it out from the 4WD box and try it out as I have never needed to use it yet, the bag was bought for a previous car.

Klaus

Mmmmm all good points - particularly Scubaroo. Feral - your logic is not quite there - yes air compressors deliver low volume at high pressure but when that pressure is reduced by the air expanding in a container it doesn't matter. I wouldn't have thought that the volume of the air in a big 4wd tyre at 35psi wasn't all that different to an airbag at say 10psi. This is effectively the point Scubaroo is making but I don't think the bags are that big - but the logic is there. I think a decent aircompresser would take about 5 minutes to inflate - less if there is a pressure tank.