richrolls
Part of things
Posts: 318
Club RR Member Number: 38
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Air Riderichrolls
@richrolls
Club Retro Rides Member 38
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Nov 10, 2012 21:35:47 GMT
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Anything is possible. I could be wrong, but the older buses and commercial vehicles had/have beam axles or solid axles so one side will be doing the exact opposite of the other and you can plumb the air with this in mind. But with independent corners I think you need to have a control of some sort on each. The O/s wheel could be pushed right up or in compression, and by rights the N/s should be at full extension or droop IF there is a solid axle between them. With and independent set up the opposing side could be anywhere. This needs to be allowed for.
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Nov 11, 2012 10:55:04 GMT
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A beam axle isn't hinged in the middle, one side can be fully compressed or extended and the other at its normal height, the angle of the wheel will change but not necessarily its height, especially if its at the light end of the vehicle. It may seem like if one side goes up the other has to come down from what you observe on the road but that will be down to body roll not the suspension, if you stick a jack under one end of a beam axle and jack it up the other side stays at more or less stock height. This is hinged in the middle, About 5:50 into this there's a animation about how a beam axle rides bumps looking from the front.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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richrolls
Part of things
Posts: 318
Club RR Member Number: 38
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Air Riderichrolls
@richrolls
Club Retro Rides Member 38
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Nov 11, 2012 12:28:30 GMT
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Yep. I agree with you on the middle hinging. The middle will move for sure as the vehicle moves along and the suspension operates. What i'm getting at is a solid axle has a limited amount of wheel relation options over an independent set up across one axle line. With a solid axle you could just maybe get away with one leveling valve in the middle. As we have talked about, the middle will be moving up and down in relation to the wheels. Parked up, The back of a vehicle goes down evenly as people get in or a load is added. Both wheels will,in effect travel up towards the body in compression. If there is a single valve mounted in the middle of the vehicle, it will be operated and pass air to each 'bag and raise the vehicle back up to its set height. If the vehicle is unevenly loaded a single valve in the centre may not pick up the loading. I personally am going to run valves on each corner for each bag. With one valve per corner the wheel to body work relation will be as maintained as set with the weight of the car on the suspension sat on the road.
I do like the big old recovery motor above.
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Nov 11, 2012 14:24:50 GMT
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I'm not sure its worth the effort of trying to save on one valve, but on the rear of a light front engined car i reckon you could get away with it if you really wanted to as the front would force it to sit level, in the same way the front leaning over can cause the inside rear wheel to pick up on hard corners. Of course most people run the pumps and tanks and stuff in the boot and are likely to have other stuff like speakers in the back as well so it seems like you may as well go for all four, especially on something like my Volvo that could carry a load of weight in the back. It looks like the Volvo isnt gonna get done now as I have a big chevy camper van to fix up, mind you air bags on the camper would be handy to level it when parked and it would be cool to be able to dump it on the deck. I may have to check how much ground clearance there is under all the tanks and stuff under it.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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