Air Lift Air Bag How To:
#21
09-20-2009, 10:37 AM
#22
09-20-2009, 11:16 AM
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Here is a link to read.
http://action.publicbroadcasting.net...st/529411.page
http://action.publicbroadcasting.net...st/529411.page
If you will read "Amy's Tire Question", you find we already know the answer. The loaded tire has more pressure than the unloaded tire. By between 0.2 psi and 0.5 psi.
WHY?
Obviously the loaded tire occupies less volume. In it's undistorted shape, the air pressure in the tire tries to get to a state where the forces are balanced and at a minimum. This means maximum volume. Then when you load the tire, the weight changes the shape, and therefore the volume is reduced.
I hope everyone realizes this is not a theoretical study. It is based on observations of loaded and unloaded vehicles using a pressure gauge capable of meauring to the nearest 0.1 psi. I suggest that folks who don't believe this should perform the experiment themselves. However, you need to get a pressure guage capable of at least 0.1 psi increments.
Hope this helps.
WHY?
Obviously the loaded tire occupies less volume. In it's undistorted shape, the air pressure in the tire tries to get to a state where the forces are balanced and at a minimum. This means maximum volume. Then when you load the tire, the weight changes the shape, and therefore the volume is reduced.
I hope everyone realizes this is not a theoretical study. It is based on observations of loaded and unloaded vehicles using a pressure gauge capable of meauring to the nearest 0.1 psi. I suggest that folks who don't believe this should perform the experiment themselves. However, you need to get a pressure guage capable of at least 0.1 psi increments.
Hope this helps.
#23
09-20-2009, 12:40 PM
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So, are we talking about 2 different makes of Air Bags ?? Or just 2 diff models ??
Mixgt - with the 100psi bags
Stonewhiteram - with the 35psi bags
(note: Even the Air Lift 1000 Instructions has some internal discrepancies, stating the 35psi max but referencing "for motorhomes, start with 50-100psi"...)
Are there simply different designs with similar capabilities but different pressure requirements ?? Or does Mixgt have some HeavyDuty bags with higher ratings ??
Mixgt - with the 100psi bags
Stonewhiteram - with the 35psi bags
(note: Even the Air Lift 1000 Instructions has some internal discrepancies, stating the 35psi max but referencing "for motorhomes, start with 50-100psi"...)
Are there simply different designs with similar capabilities but different pressure requirements ?? Or does Mixgt have some HeavyDuty bags with higher ratings ??
#24
09-20-2009, 02:05 PM
But back to the reason we got started on tire pressure, if there was a load on one side of the truck, the pressure in both bags would always be equal, and not increase significantly.
#25
09-20-2009, 02:06 PM
So, are we talking about 2 different makes of Air Bags ?? Or just 2 diff models ??
Mixgt - with the 100psi bags
Stonewhiteram - with the 35psi bags
(note: Even the Air Lift 1000 Instructions has some internal discrepancies, stating the 35psi max but referencing "for motorhomes, start with 50-100psi"...)
Are there simply different designs with similar capabilities but different pressure requirements ?? Or does Mixgt have some HeavyDuty bags with higher ratings ??
Mixgt - with the 100psi bags
Stonewhiteram - with the 35psi bags
(note: Even the Air Lift 1000 Instructions has some internal discrepancies, stating the 35psi max but referencing "for motorhomes, start with 50-100psi"...)
Are there simply different designs with similar capabilities but different pressure requirements ?? Or does Mixgt have some HeavyDuty bags with higher ratings ??
The 100 PSI things must be for a different model of air bags.
#26
09-20-2009, 03:16 PM
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For some reason I thought we were talking about several PSI or more. My gauge does not show that little, so I just assumed we were talking about a noticeable difference.
But back to the reason we got started on tire pressure, if there was a load on one side of the truck, the pressure in both bags would always be equal, and not increase significantly.
But back to the reason we got started on tire pressure, if there was a load on one side of the truck, the pressure in both bags would always be equal, and not increase significantly.
As for the air bags, if they are piped together, the pressure has to be equal, at all times. If they are piped separately, inflated to the same pressure, and then the truck is loaded on one side, the pressure in the bag on that side will be higher than the unloaded side. But it won't be a large difference.
#27
09-20-2009, 03:20 PM
The pressure increase will be higher, as a percentage, as the pressure itself is lower. Once tire pressure is around 35PSI, the pressure change is very small. If the tire pressure is near 0 (gauge) unloaded, when you put the truck back on the ground, you'll probably see a few PSI increase.
As for the air bags, if they are piped together, the pressure has to be equal, at all times. If they are piped separately, inflated to the same pressure, and then the truck is loaded on one side, the pressure in the bag on that side will be higher than the unloaded side. But it won't be a large difference.
As for the air bags, if they are piped together, the pressure has to be equal, at all times. If they are piped separately, inflated to the same pressure, and then the truck is loaded on one side, the pressure in the bag on that side will be higher than the unloaded side. But it won't be a large difference.
#29
09-21-2009, 12:30 PM