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Old 09-03-2013, 06:02 PM   #43
"Tinbad ... the Trailer"
 
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Where'd my pic go?
Oh, there it is.
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Old 09-04-2013, 12:29 AM   #44
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Novel idea....but that's too nice a trailer to screw up.
Yeah, and the canvas Da Vinci painted the Mona Lisa on was pretty clean before he got to it, huh?

Reminds me of that nut who thought we needed a light bulb.
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Old 09-04-2013, 12:34 AM   #45
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Del - That's brilliant! Great design and a clever use of space. Don't let the grumps convince you otherwise - "The Trunk" is working famously over mountain roads, and up and down the interstate. So far, despite the concerns of others, the back end of the trailer hasn't ripped apart nor have the frame rails warped.

It looks like your design will be wonderful. Good job!
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Old 09-04-2013, 02:10 AM   #46
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Actually, I saw that there is a huge frame jig, which could easily handle 35' foot long pieces of skin, which appears to be quite old on the shop floor. It has color coded slots for the ribs depending on the model they are making. After the holes are pre-cut except for an inch of material to hold the "hole" in place for strength while moving the sheet from the cutting table, the outer skin is attached to the ribs before moving to the next station. I will know more in January as I spend the days at the factory watching our unit come to life.

My observation is that all models apparently use the same side ribs and width of side panels. The width factor is controlled by the roof ribs and roof panel.

Since there is a jig for the assembly, it would seem to me that the rib variance might be within a 1/8" to allow for the rib wiggling in it's slot.
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Old 09-04-2013, 06:17 AM   #47
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Where'd my pic go?
Oh, there it is.
Where you tote the poop tube ?
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Old 09-04-2013, 11:25 AM   #48
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Where'd my pic go?
Oh, there it is.

Del, REALLY nice work, in both design and execution.

Unfortunately, after reading some of snarky comments Russ has received on this thread, it appears that for some here if it wasn't riveted on in Jackson Center, Ohio, it's desecration.

I've been struggling with storage isues on my Airstream and plan to do something similar this winter. I'll post the finished product for the purists with their greasy barbeque grills sliding around under their dinettes to criticize....
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Old 09-04-2013, 12:11 PM   #49
"Tinbad ... the Trailer"
 
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LFC: The "stinky slinky" goes in the PVC Tube thats forward (mounted athwart ships) of the grey water tank. I was thinking of adding a second one for fishing rods. That way it's not "contaminating" any water hoses which I'll now keep in the "trunk".
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Old 09-05-2013, 12:52 AM   #50
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It appears that the frame strength would have to increase with the GVW increases associated with the longer models and trim levels. Therefore, would the logic be that the longer or heavier units might better support this trunk design?
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Old 09-05-2013, 08:00 AM   #51
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It appears that the frame strength would have to increase with the GVW increases associated with the longer models and trim levels. Therefore, would the logic be that the longer or heavier units might better support this trunk design?
Not necessarily. The less overhang you've got, the more likely it is that the trailer can support the load, due to moment of inertia. A bumper-mount box places a load right at the very end of the moment arm where it has the greatest effect. For example, a 75-pound load 10 feet from the axle is the same as a 50-pound load 15 feet from the axle, in terms of bending moment.

And that's just for static (unmoving) loading. When you consider dynamic loading while traveling down the road (when you hit a bump or pothole) a longer trailer has more flex than a shorter trailer due to the longer moment arm, and the load moves through a greater vertical distance, and so applies more force.

A shorter trailer will better support a bumper-mounted load than a longer trailer, all other things being equal.
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Old 09-05-2013, 08:15 AM   #52
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Rear end seperation

The "Trunk" is a beautifully installed addition and as the experts have noted a NO NO.
What I have noticed from this thread is that if it has not damaged the trailer by now then it won't happen at all. I believe that it will take time and I am sure it will happen but not tomorrow. If you search for posts for Rear end seperation there are many pictures and fixes for this problem and these trailers didn't have the load on the bumper but just normal traveling down the road.
JMOO
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Old 09-06-2013, 03:39 AM   #53
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I did not weigh all the drainage related stuff I put in the factory bumper storage space, but it might be 20 pounds. There was no factory placard providing weight guidance for that storage area. As a matter of fact, I called the factory to inquire into the weight capacity of the overhead storage bins, since that is the major kitchen storage area as well as the major storage area in both ends of the trailer, and that information has never been forthcoming.

On this forum, there has been a lot of information about rear frame separation on more "mature" models and is an on going issue even with the newer versions of the 22' model.

When one looks at the Airstream Catalog, those models less than 25' all have the toilet either right at the back or darn close to it. I lack the detailed knowledge of the shorter trailers construction, but the bomb sight of the 25FB toilet is aimed directly into the black water tank which is just forward of the axles. If a similar ballistic design is in the shorter trailers, then the mass of the black water tank and it's accumulating contents would be at or close to the back of the trailer.

That thought would lend credulence to not putting anything at the back of the coach. Perhaps that is why the two Sport Bambi models lack a rear bumper (including cost savings). That eliminates the leverage that storage area would have on the frame.

And yet, the Eddie Bauer models have a lot of structural beefing at the rear of the trailer to support that door, which is compensated by no permanent low mounted cabinetry in that location. And the "cargo" by default would be at the back of the trailer.

That leaves me wondering if the EB series has a stronger frame to compensate for the rear bias of the loads?

Of interest, while in the UK, I chatted with the local Airstream distributor who explained that they send their frames with flooring from Germany to Jackson Center to have the aluminum shell fitted and then they install the interior when it gets back to the UK. Their pricing, including the 20% VAT, puts the cost of a 27' tandem axle close to Classic levels when considering the exchange rate and the nearly $7,000 frame shipping costs for each unit.

Perhaps the US versions might need a more robust frame redesign since many of our roads are in decline and getting rougher.
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Old 09-07-2013, 08:46 AM   #54
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Del - That's brilliant! Great design and a clever use of space. Don't let the grumps convince you otherwise - "The Trunk" is working famously over mountain roads, and up and down the interstate. So far, despite the concerns of others, the back end of the trailer hasn't ripped apart nor have the frame rails warped.

It looks like your design will be wonderful. Good job!
Wild Air - Thanks for the performance update on the trunk. It's refreshing to see some innovation shared herein.

Del - Great Solution. Kudos for original thinking!

Safe Travels,
JamuJoe
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Old 09-08-2013, 06:28 AM   #55
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I really don't think anyone including Airstream expects to see damage over night....

As explained the unavoidable damage will happen over time.
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Old 09-09-2013, 12:59 AM   #56
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Perhaps just after the two year warranty expires?
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