First Trip in my AT Horizon

Romer

Adventurer
My AT Horizon modifications are discussed here

http://www.expeditionportal.com/forum/showthread.php?t=34387

The Globetrotter is discussed here
http://www.expeditionportal.com/forum/showthread.php?t=34934

Several members of The Rising Sun and Wasatch clubs met in Moab over the weekend and camped at Area BFE.

Gave me an opportunity to try out the trailer.

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It tracks well behind the Landcruiser, but seems to bounce a bit at low speeds. Once I speed up, it dampens out. This is not the new AT Air suspension, but the older Torsion bar setup. This slight bouncing occurs on city roads. It's hard to pack the trailer differently with the batteries and water up front. I do have it towing level, I was wondering if I used a lower hitch and dropped the nose down an inch if that would change the ride. Guessing this is one of the reasons AT changed to their new Air suspension set-up.

The trailer took me about 20 minutes to setup and this included both awnings and unpacking. It was the awnings that took me the longest.

Several people have commented how hard the Globetrotter RTT is to setup. That you have to climb up to get the leverage to open it. I tried something new which made it easy. I opened the top to unpack and opened up the RTT with the top open to provide a better angle, reached in and pulled on the strap and it opened easy even with the changing room panels installed. Then closed the top, zippered the room panels together and that was all it took to deploy the RTT.
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Took me much longer on the awnings because I was trying to figure out how they worked first.

The nights were really cold. I used a Mr. buddy Heater on a small table with a battery powered CO monitor at bed level., I left the front door cracked a bit and was nice and toasty. I was hoping to use the New Zodi tent heater I bought on ebay (They don't sell them anymore), but the hoses for it had not come in before I left for Moab. That will be a better setup, with the heat unit outside and hooked up to one of my propane tanks. Just a hose will be in the tent providing heat. I will keep the Mr. Buddy Heater as a backup. Glad I had it.

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The bed in the RTT was very comfortable and I slept well. The kitchen worked great.

Driving home there were high winds which made driving a bit more squirrelly.

The larger Pop up camper I had seemed to track better in the tight mtn curves at speed, but this trailer did fine. Probably having a heavier trailer here helped relative to the Pop-up.

Overall, very happy with this setup. The one lesson I learned was to buy really good food storage Tupperware. The beans packed in a Tupperware container opened up and spilled all over the inside of my fridge. They were pretty good beans too!
 

Romer

Adventurer
One thing I forgot was the back part of the RTT cover was "poofing up" with the wind when driving at highway speeds. I stopped at a hardware store and put a strap around it
 

R_Lefebvre

Expedition Leader
Yes, having the trailer sit level, vs. towing slightly nose high will help with bouncing. I'm not sure how far off you are now. The effect is minor at low angles, but pretty substantial as the angle increases. My utility trailer is really bad when hooked up to my Disco. Basically what happens, is the upward pointing force vector on the tongue has the back of the truck "yanking" the trailer right off the ground over bumps.

Also, what tire pressure were you using? You should lower your pressure off-road just as you would in your truck.
 

Romer

Adventurer
Yes, having the trailer sit level, vs. towing slightly nose high will help with bouncing. I'm not sure how far off you are now. The effect is minor at low angles, but pretty substantial as the angle increases. My utility trailer is really bad when hooked up to my Disco. Basically what happens, is the upward pointing force vector on the tongue has the back of the truck "yanking" the trailer right off the ground over bumps.

Also, what tire pressure were you using? You should lower your pressure off-road just as you would in your truck.

Rob - I am sitting level now, I was wondering if pointing the nose down would help. I can put a hitch that is 1" lower on my truck

I run the Toyo's 35's at 42 psi, the same as on the ruck and would air them down to 16-18 when off road.

Bouncing off road is one thing, I am talking low speed on a paved city street.

Thanks for the reply.
 

mrchips

Adventurer
At 42 psi that is way to much tire pressure for the trailer. I run my Chaser loaded on 33's @ 16 psi.
Take a pice of chalk and make a mark across the tire,, tow it a 200 ft and look @ the pattern. Adjust tire pressure till the chalk line is worn off evenly across the tread, and now you have found a good running pressure. At 42 psi no wonder it bounces around, as for off road I don't air down any further unless I am going over allot of rocks.
 

DaktariEd

2005, 2006 Tech Course Champion: Expedition Trophy
I have the same Horizon with torsion bars. :sombrero:

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The bouncing is definitely an issue on some paved roads.
I run the Horizon tires a little low to help a bit with that, around 20-25 lbs., regardless of whether road or trail. I could drop them further on trails if needed, but so far haven't had to do it.
Seems to work for me. :victory:

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R_Lefebvre

Expedition Leader
When you say bouncing... do you mean bouncing with tires right off the road? Or just that the trailer is "busy" back there?
 

Romer

Adventurer
When you say bouncing... do you mean bouncing with tires right off the road? Or just that the trailer is "busy" back there?


Just the trailer is busy and as I pick up speed id damps out and stops.

I'll try the lower tire pressure, thanks guys
 

ntsqd

Heretic Car Camper
Not sure of the comparative weights, but I've mistakenly towed the TrailBlazer trailer a couple hundred miles with 5 psi in the tires. Those absurdly large 33-12.50's weren't any warmer than normal, and had no more bulge than when at my normal ~25 psi.

Rebound damping on torsion bars is crucial. When at their most fully compressed they also usually have a lot of leverage to get things moving fast.
 

elmo_4_vt

Explorer
That looks like an awesome time. I'm glad the trailer and tent worked out well for you. The suspension should be an easy part to get settled, and my suggestion would be to lower the tire pressure too, at least as a starting point.

Makes me really itch to get out and use mine.

Did you stake down the walls at all, or just let them hang? Any ground cloth? I can't tell from your picture.

Don

-
 

Romer

Adventurer
Oh. Does it have shocks?

No shocks

That looks like an awesome time. I'm glad the trailer and tent worked out well for you. The suspension should be an easy part to get settled, and my suggestion would be to lower the tire pressure too, at least as a starting point.

Makes me really itch to get out and use mine.

Did you stake down the walls at all, or just let them hang? Any ground cloth? I can't tell from your picture.

Don

-

I did stake down the walls. It got windy at night and both awnings and the walls held firm.

The length is perfect, My delaer had the manufacturer make me a set that were 4 inches longer due to the 35" tires and the height of the mounting racks.
 

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