Thread: more height- raising your trailer

Originally Posted by tonic

I .. have found a great camper with independant suspension on air bags. So if you want more height you just pump up the air bags.

Do you have a link to have a look at its air spring setup?

The camper floor will need a bit more ontop to level it out when the tent is up Chris. I want my refund on a shocking softfloor I am visting VCAT next week which might give me some cash for a tinney for ontop this rig. looking to visit the Cape later this year and I like fishing.
Before the trailer is bum down and trailer tires with only a few inches clearance. The tow hitch hight is great off road- I have a adjustable version for the boat tralier. I would not use it off road as I removed/replaced my plow already. To level the floor when the tent is up I am adding some Box steel of a suitable height to enable me to bolt and tie a boat motor under the tinney I assume I might get.



The photos show before, WHY and after

The after shot with increased height was put over a few ramp overs today with much more clearance and much more level tow and ride at off road height settings on the Disco.


The photos is back from Bluff Hut about 20km south of mount Buller from Picture Point. Well worth a stop, picture or two, explore and a brew. It is a great drive at about 5 to 10kph for most part and not to hard but your tires might find the rock sections fun it you do not set the presures at a suitable setting. Could not believe how many people were down low on the Howqa river at places like sheep yard flats. Great to see so many family out and kids having so much fun. The number of interstate 4wd clubs I met was amazing. The number of SA and NSW clubs was amazing as was the few WA, NT and QLD 4wds I met.

Weakestlink, your quick success prompted me to swap my van's springs to the other side as the left side only had 50mm of travel whereas the right had closer to 70mm. The springs looked identical when side by side so perhaps the left is lower due to a bit more weight on the left but I suspect the spring has lost some of its ability to support the weight from being on the road edge side. I can't tell yet if there's any improvement on the left side as the van needs to be moved to let the wheels spread so that the suspension can lower properly but hopefully there's a small improvement.

Originally Posted by tonic

Not the case with independent trailer suspension. They work on two A Frames, one each side of the trailer. The forces work verticle inside the sping or air bag. The point of the A holds the axle and spring or air bag. So when the wheel is pushed up the force goes up behind the wheel straight up to the chassis through the spring or air bag at the wheel point. This pushes the trailer chassis up at the wheel thus lifting the trailer. The pivot point, the base of the A just holds the suspension in place and allows the movement of the spring or air bag.

tonic, defies the law of physics....and logic, Regards Frank.

Originally Posted by Graeme

Do you have a link to have a look at its air spring setup?

Not sure how to do that, so just look up Jimboomba Camper Trailers.

Originally Posted by Graeme

Do you have a link to have a look at its air spring setup?

I had air shocks on a LADA NIVA- stop laughing all. It was a long time ago and it went well on the beach.

The shockies had a normal air valve to pump up or lower the ride and worked a treat.

Hot rod lads seem to have IRS and air covered a bit

Originally Posted by Tank

tonic, defies the law of physics....and logic, Regards Frank.

See your point Frank, but I think you need to have a look at set up to see where the forces are acting. I think you might be considering a cars independent suspension system where the pivot point is in the midle at the diff going out to the wheels.

On a trailer system the wheels are being pulled from the pivot point. The Pivot point, the base of the A is toward the front of the trailer. The point of the A holds a stub axle and spring/air bag mount.

So as you drive forward the wheel is more or less draged over a bump, the wheel travels up pushing agiants the spring/air bag behind the wheel. The force then travels up from behind the wheel to the chassis via the spring/air bag. So the opposite force is from the chassis at the top of the spring/air bag back to the stub axle lifting the trailer on that side.

Originally Posted by tonic

I think you might be considering a cars independent suspension system where the pivot point is in the midle at the diff going out to the wheels.

My van is the same but it doesn't make any difference as its only the wheel and the apex of the wishbone that is moving up towards the chassis.