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Old 06-23-2012, 09:23 AM   #15
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1963 24' Tradewind
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I not only would like to know what the original axle was rated at, or if the 5,200# axle the OP is trying to replace, is original.
Also, I'm curious as to what size and type of material that the frame is made out of and what the condition of that material is.

The 5200lb axle is a Dexter Torflex. I replaced the original in 07. The frame has surface rust, but looks solid.
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Old 06-23-2012, 09:32 AM   #16
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Looks like I will have to shed some weight. I appreciate all the comments. Thanks for the help!
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Old 06-23-2012, 12:26 PM   #17
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The 5200lb axle is a Dexter Torflex. I replaced the original in 07. The frame has surface rust, but looks solid.
It sounds like that is the perfect axle for that trailer. If it has a 4" standard structural channel frame (that is in good condition) it should be fine when the added strength of the shell is added to it. For an equipment trailer, with no shell, I would have used 5" structural channel.
All frames flex, but if built properly they are very rigid.

There is a point where counting on the shell to give a significant amount of the structural integrity is counter productive. If the shell is in good condition and attached properly it is fine, but when they get old and come loose it can create problems. Keep in mind the amount of weight that the manufacturer is saving is minimal.
The weight of standard structural channel is as follows:

3" 4.1 #/'
4" 5.4 #/'
5" 6.7 #/'
6" 8.2 #/'

If a trailer was 20' long, including the tongue (40' of material) the weight difference between a 4" channel trailer and a 5" channel trailer is only 52#. This doesn't include the upsizing of the cross members on increased size on an axle. Airsteam could upsize their frame on their single axle trailers from a 3" channel to a 5" channel and put a 5,200 axle on it and only increase the dry weight by about 150#. The carrying capacity would increase 550# and the frame would be strong enough that you could lift it from many more locations. The frame would still flex, but not as easily. That 5" frame would probably take a 6,000# axle.
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Old 02-06-2013, 03:09 PM   #18
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I have all the Henschen torsion axle specs that Airstream used from 1961, until the 80's.

A 1963 Tradewind (24 foot) Airstream, had it's single axle rated at 5000 pounds.

Andy

Hi Andy could you let me have the orginal Axle specs for a 1962 Safari single axle please?
Need the specifics to give to my local axle guy to match...would be much appreciated

Cheers

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Old 02-06-2013, 04:46 PM   #19
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1962 26' Overlander
1961 26' Overlander
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All frames flex, but if built properly they are very rigid.
Airstream frames are engineered to flex. The notion of a ridged frame is counter to how they are engineered. This seems to be a very common discussion on this forum and everyone keeps thinking solid solid solid. White box trailers use solid frames, not Airstreams.
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Old 02-06-2013, 05:00 PM   #20
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Hi Andy could you let me have the orginal Axle specs for a 1962 Safari single axle please?
Need the specifics to give to my local axle guy to match...would be much appreciated

Cheers

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Andy
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