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Old 09-10-2011, 01:23 PM   #57
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I am not sure if this helps but when Colin Hyde redid our chassis he bolted in a bike rack that was reinforced to the frame in numerous places. Something to seriously consider if you are doing a significant restoration!
The issue is not a matter of what you do to the frame.

Since the shell holds up the frame, it's a matter of what you do the shell, to support the weight of the frame at the rear of the trailer.

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Old 09-10-2011, 10:15 PM   #58
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The issue is not a matter of what you do to the frame.

Since the shell holds up the frame, it's a matter of what you do the shell, to support the weight of the frame at the rear of the trailer.

Andy
I'm not sure I follow... I just picked up a 2006 22' CCD and it has a receiver mounted on the back... I'm assuming it's welded to the frame. Anything I hang on there is going to create load on the frame, and load on anything above it. If you suggest that 'the shell supports the frame'... then why is there a frame behind the rear wheels at all? Better to have the shell only have to support it's own weight, no?

I think the frame and shell work together... and that overloading one will damage the other... no?
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Old 09-11-2011, 12:16 AM   #59
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I'm not sure I follow... I just picked up a 2006 22' CCD and it has a receiver mounted on the back... I'm assuming it's welded to the frame. Anything I hang on there is going to create load on the frame, and load on anything above it. If you suggest that 'the shell supports the frame'... then why is there a frame behind the rear wheels at all? Better to have the shell only have to support it's own weight, no?

I think the frame and shell work together... and that overloading one will damage the other... no?
No, not exactly.

The principal method of construction, of an aircraft is called "monocoque".

Since an Airstream is not totally rounded, it's design is called "semi-monocoque".

Monocoque, as defined by Webster, "is a load bearing shell".

Therefore, the shell supports the frame.

That is also why an Airstream frame can and is very weak, in comparison to SOB trailers.

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Old 09-11-2011, 07:10 AM   #60
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The newer, "wide body" Classics have a much heavier frame, more similar to other brands than previous models. While it's still not a good idea to hang stuff off the back, the newer frames are much stronger than the ones on the older, narrow body trailers.
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Old 09-11-2011, 09:46 PM   #61
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Terry,

What year marked the change to a heavier frame?
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Old 09-12-2011, 11:24 AM   #62
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No, not exactly.

The principal method of construction, of an aircraft is called "monocoque".

Since an Airstream is not totally rounded, it's design is called "semi-monocoque".

Monocoque, as defined by Webster, "is a load bearing shell".

Therefore, the shell supports the frame.

That is also why an Airstream frame can and is very weak, in comparison to SOB trailers.

Andy
Or, buy your definition, the shell only semi-supports itself... it would seem that some of them cannot support their own weight at all...

Maybe it more accurate to call it a 'Unibody', where the 'frame' and 'shell' are integral units.
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Old 09-12-2011, 11:48 AM   #63
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Or, buy your definition, the shell only semi-supports itself... it would seem that some of them cannot support their own weight at all...

Maybe it more accurate to call it a 'Unibody', where the 'frame' and 'shell' are integral units.
It's not my difinition, but it is Airstream's definition.

Always has, always will.

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Old 09-13-2011, 12:24 AM   #64
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One more question/observation... my 2006 has 'wheelie bars' on the back... smaller metal wheels meant to catch the back before it hits the ground... they seem to need very little slope before they come into action (I think they are too low myself)... but... they are part of a rear crossmember that includes my 2 inch receiver, and the 2 rear levelling jacks. It sure seems like a factory installation... any insight onto whether that vintage might have come with those features? Or I am looking at some type of add-on?
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Old 09-13-2011, 12:29 AM   #65
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One more question/observation... my 2006 has 'wheelie bars' on the back... smaller metal wheels meant to catch the back before it hits the ground... they seem to need very little slope before they come into action (I think they are too low myself)... but... they are part of a rear crossmember that includes my 2 inch receiver, and the 2 rear levelling jacks. It sure seems like a factory installation... any insight onto whether that vintage might have come with those features? Or I am looking at some type of add-on?
Airstream has never installed rear wheels.

They are a hazard to the trailer.

Hit the pavement with one of those rear wheels and watch how fast the rear quarter panel gets damaged.

Take them off!!!!

That's why Airstream installed rear skid plates.

Andy
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Old 09-13-2011, 06:54 AM   #66
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Airstream has never installed rear wheels.


That's why Airstream installed rear skid plates.

Andy

If the wheels can cause quarter panel damage, would I be right in assuming that the skid plates would cause the same damage if they were to contact, the difference being that the wheels are likely much lower than the skid plates and and therefor that much more likely to contact the road surface?

Brian.
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Old 09-13-2011, 01:13 PM   #67
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The wheels are low enough than when I back in beside my house, they dig in a bit to the gravel/grass area because of the slope. As I mentioned, the receiver and rear levelling jacks are all part of this same contraption... if it's not OEM, someone sure did a nice job with it.
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Old 09-13-2011, 02:16 PM   #68
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If the wheels can cause quarter panel damage, would I be right in assuming that the skid plates would cause the same damage if they were to contact, the difference being that the wheels are likely much lower than the skid plates and and therefor that much more likely to contact the road surface?

Brian.
Rarely, as many thousands can attest to.

Andy
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Old 09-13-2011, 03:18 PM   #69
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Leveling jacks on the rear sounds interesting?! jim
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Old 09-13-2011, 03:20 PM   #70
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Rarely, as many thousands can attest to.

Andy
I'm not familiar with the newer models. So either the skid plates must be larger and dispersing the same road force over a greater area than that of the wheels, or it is another moment arm problem in that the wheels are set farther back than the skid plates are/would be, so the pivot from the axle is a longer distance, providing more force, and on the bumper as opposed to the frame rails? Or a combination of both?

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