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Old 02-15-2008, 07:51 PM   #57
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Quote:
Originally Posted by 3Ms75Argosy
Can someone post a pic of the Dexter mounts? I'm not sure I understand when PC and GP state that one doesn't need the mounts. Isn't this what bolts to the side plates? OR is there a mount already there (as above in the Dexter drawing) and the "side mount" goes over the existing mount? If so, why is the side mount extra metal even offered?

confused...
Marc
It seems we all ended up with a pair of these brackets that Dexter simply bolts to the axle hangers. I suspect it SOP since if ordering an axle for a new trailer it would come in very handy
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Old 02-15-2008, 07:53 PM   #58
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starting angles

Replacement Henschen axles, automatically come with a 35 degree starting angle, for all years.

Shock brackets are factory installed on all axles for the 1969 and newer trailers.

Shock brackets for 1968 and older trailers are shipped loose, so that they can be installed as necessary, since there is a large difference in the wheel well positions and dimensions.

Andy
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Old 02-15-2008, 09:32 PM   #59
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Quote:
Originally Posted by Inland RV Center, In
Replacement Henschen axles, automatically come with a 35 degree starting angle, for all years.

Shock brackets are factory installed on all axles for the 1969 and newer trailers.

Shock brackets for 1968 and older trailers are shipped loose, so that they can be installed as necessary, since there is a large difference in the wheel well positions and dimensions.

Andy
I guess with smaller dia. tubes you have to start higher??
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Old 02-18-2008, 09:43 AM   #60
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Ride quality

Here is a section of the baseline data. The graphs are vertical acceleration and the scale is +-.8 G's. The datalogger was bolted to the floor of the trailer just inside of the curbside front tire (under the stove). For the trucks data, it was centered in the rear floorboard and the truck was empty, no trailer in tow. The top graph is Airstream WithOut Weight Distribution, the next is With Weight Distribution and the bottom is the truck. The event I selected is a newly paved section of county road with 3 bridge 'bumps", clearly visible in the Truck graph.
Items of note -

-The shocks on my unit are ineffective. They either have the wrong damping frequency, they are completely shot or the suspension rate has shifted away from the norm and the shocks don't work at that frequency. Thus trailer bounces down the road at a consistant frequency. This may be what caused my wall damage, the consistant hammering.

-The suspension is not bottoming as this would be observed by a huge spike.

-The ride differs considerably inside the truck and the camper.

More data as I crunch it.
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Old 02-18-2008, 10:02 AM   #61
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Wow!

Quote:
Originally Posted by HiHoAgRV
... The top graph is Airstream WithOut Weight Distribution, the next is With Weight Distribution and the bottom is the truck.....
What a great comparison - Many thanks, HiHo


I'm amazed that the Vert Acc WITH WD appears to be almost the same as the VA WITH OUT WD - I would have thought that linking the trailer suspension to the "better" (and softer) suspension of the truck (via the WD hookup) would have made more of a difference...

Also amazed that the traler did not pickup the "speed bumps" (especially WITH the WD) that were evident in the "truck" strip.

Can't wait to see the same trip post axle replacement -

BTW, how is fitment and/or replacement of the new axles coming along?

Enquiring minds want to know!
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Old 02-18-2008, 10:26 AM   #62
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Quote:
Originally Posted by HiHoAgRV
-The shocks on my unit are ineffective. They either have the wrong damping frequency, they are completely shot or the suspension rate has shifted away from the norm and the shocks don't work at that frequency. Thus trailer bounces down the road at a consistant frequency. This may be what caused my wall damage, the consistant hammering.

-The suspension is not bottoming as this would be observed by a huge spike.

-The ride differs considerably inside the truck and the camper.
I am not clear on your statements.

Are you referring to the shocks on your trailer or the truck?

This was done before any suspension work on trailer or truck?

Other data that would be helpful would be:
time frame and distance this test took place over
the year make and model of the truck
the mileage on the truck
tire size and make for both truck and trailer
tire pressure for both truck and trailer
actual weight of truck and trailer
GCWR of truck
last time shocks were replaced on both truck and trailer

If you are referring to the ride in the truck, this brings back memories of the Ford truck commercial. Where there was a stick strapped to the cab and the frame. Then it was driven over a rough surface with the stick was centered between lights. The point was to give a visual of the smooth ride in the cab.

>>>>>>>>>>>>>Action
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Old 02-18-2008, 10:50 AM   #63
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Quote:
Originally Posted by Action
Are you referring to the shocks on your trailer or the truck?
Trailer only, truck still rides like a 3/4 ton
Quote:
Originally Posted by Action
This was done before any suspension work on trailer or truck?
Nope, everything is just like we have been using it for the past two years
Quote:
Originally Posted by Action
time frame and distance this test took place over
the year make and model of the truck
the mileage on the truck
tire size and make for both truck and trailer
tire pressure for both truck and trailer
actual weight of truck and trailer
GCWR of truck
last time shocks were replaced on both truck and trailer
>>>>>>>>>>>>>Action
All the data was gathered on a approx 5 mile loop, same start and stop location, Saturday just before we went camping for the evening. TV is a 2006 Ram TD 3/4 ton, 60k miles (High highway usage, I think I'm the Highest Average Speed record holder on another thread ), Michelin LTX 265 17's/Marathons at 55TV/65TT psi. The weights are published for the truck, the TT was dead on top of the factory weight prior to the remodel, no weight taken since (guess +300 lbs?), 1/4 tank of water, Holding tanks empty. Original TV shocks, ???on the TT guessing original or at least well aged, no leaks.
The total amount of data taken is roughly 800,000 points per run. The TT suspension seems to have a natural frequency at 3.1hz. If the bounce was due to tire/wheel/running gear I would have seen a 8 hz, thus the observation of the shock/suspension mismatch.
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Old 02-18-2008, 10:58 AM   #64
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Quote:
Originally Posted by 87MH
What a great comparison - Many thanks, HiHo


I'm amazed that the Vert Acc WITH WD appears to be almost the same as the VA WITH OUT WD - I would have thought that linking the trailer suspension to the "better" (and softer) suspension of the truck (via the WD hookup) would have made more of a difference...

Also amazed that the traler did not pickup the "speed bumps" (especially WITH the WD) that were evident in the "truck" strip.

Can't wait to see the same trip post axle replacement -

BTW, how is fitment and/or replacement of the new axles coming along?

Enquiring minds want to know!
I'll do some comparison of the pitching with and w/o WD, I expect to see the biggest different there. The truck actually rides smoother w/o wd, by the seat of my pants.
I think the trailer floats over the speed bumps then bounces for the next few seconds, unlike the truck that nails it and then settles down.

I also want to see the 'post' data, waiting on feed back from Dexter on what can be done...If I was not posting all of this, I would have torn into the install but I thought I'd wait see how Dexters response to a dealer or customer (probably the customer... ) mixup
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Old 02-18-2008, 11:03 AM   #65
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Quote:
Originally Posted by HiHoAgRV
Trailer only, truck still rides like a 3/4 ton...All the data was gathered on a approx 5 mile loop, same start and stop location, ....
What was the average speed on the loop? - was it about the same for all three runs?

It appears as if there are about 6 stabilized areas of similar harmonics on both of the trailer runs (events do not correlate on the truck run, though) - would it be possible to over-write on the strip the approximate speeds and road conditions on each of these 6 event horizons?

Really interesting info - especially the low g's on the "worn out" trailer axles as compared to the 3/4 ton -

A run on the truck with the 600 to 700 lbs from the tongue load on the rear end would be interesting. I had a E-350 Ford dually Cabriolet that rode as rough as a cob - until you put a thousand pound load in the bed -
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Old 02-18-2008, 11:14 AM   #66
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Quote:
Originally Posted by 87MH
What was the average speed on the loop? - was it about the same for all three runs?

I appears as if there are about 6 stabilized areas of similar harmonics on both of the trailer runs (events do not correlate on the truck run,though) - would it be possible to over-write the approximate speeds and road conditions on each of these 6 event horizons?

Really interesting info - especially the low g's on the "worn out" trailer axles as compared to the 3/4 ton -

A run on the truck with the 600 to 700 lbs from the tongue load on the rear end would be interesting. I had a E-350 Ford dually Cabriolet that rode as rough as a cob - until you put a thousand pounds in the bed -
My truck rides better with the trailer than without, with the best ride being w/o wd.
Where this snapshot was taken the speed was 40 mph. The loop is in 3 sections, the 1st at 40 mph the second part of the loop was at 30 and the final section was 55 mph on a 4 lane. All section showed the same harmonic.
I shoud be able to do an overlay summary of all three runs in a 'displacement' mode, but I will have to use a different computer. The last time I did that it took 20 minutes of computation time on a dual quad core machine , my laptop will puke kilobytes out of it's usb ports and kick over dead if I try it now.
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Old 02-18-2008, 11:33 AM   #67
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Quote:
Originally Posted by HiHoAgRV
My truck rides better with the trailer than without, with the best ride being w/o wd.
This is what I would haved guessed for a 3/4 ton vehicle. Especially with a TD. There is a bit of weight packed in the front end of that, so designing a suspension that works well w/o a load and with load becomes a challenge.

With 60K on the clock on an '06 you don't let the vehicle get much rest. Changing out the OE shocks may provide a better ride empty with a premium replacement. Another way to play with the ride charistics is to change inflation in the TV tires. It's a hassle and it does help. Or just put up with the ride when not towing.

I am a little surprised at the the better ride diff w/o the wd.
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Old 02-18-2008, 04:34 PM   #68
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Todays status

For those of ya'll that have done a Dexter swap, you might recognize the highlighted spec. These axles won't be going under my trailer since I don't need a 5,200lb (axle #1) + 5,200lb (axle #2) + 500lb (hitch) = 10,900 lb GVWR...
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Old 02-18-2008, 05:35 PM   #69
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Quote:
Originally Posted by HiHoAgRV
For those of ya'll that have done a Dexter swap, you might recognize the highlighted spec. These axles won't be going under my trailer since I don't need a 5,200lb (axle #1) + 5,200lb (axle #2) + 500lb (hitch) = 10,900 lb GVWR...
The plot thickens! I assume this is good news or is this order number two? I have to think Andy is enjoying this.
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Old 02-18-2008, 05:44 PM   #70
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Quote:
Originally Posted by byamcaravanner
The plot thickens! I assume this is good news or is this order number two? I have to think Andy is enjoying this.
Still order #1. Today was the first day I was able to look at them in the daylight and noticed the engraved '5200' on the beam. Dealer& Dexter conversations are onging...feedback is due tomorrow.

If anyone has a couple vintage single axle 'streams that need some 5200 lb axles I think I know where some might be availble...
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