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Old 07-06-2014, 05:32 PM   #1
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Fishtailing popup

Have a 2010 Coleman dynasty Westlake popup. It seems to excessively fishtail over 63 mph. The only way I know how to fix fish tailing is to move weight from the rear of the trailer to the front. In this case the trailer is empty and there us not much room to put cargo up front (fridge, toilet/shower). I tried to add weight by filling the fresh water tank (located near the front of the trailer) but that didn't appear to have any effect.

Any experiences or suggestions?

Ps, tires are st175/80 d13
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Old 07-06-2014, 05:37 PM   #2
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I am going to start with questions for you:
What does the trailer weigh loaded, ready to go?
How much tongue weight does it have when loaded ,ready to pull?
Suppose to be 10 - 15 % of the total weight on the tongue.
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Old 07-06-2014, 06:31 PM   #3
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http://www.reeseprod.com/products/we...g6!5TGl98QV|Fo

This is what I used in my PUP days, and later small TT days as well.
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Old 07-06-2014, 10:09 PM   #4
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Moving more weight forward is a start. I take it that the Westlake doesn't have a front storage trunk?

Next, how level is your trailer and the tow vehicle? Having a soft suspension mini-van or SUV will also not help.

If not completely level then a tad of sag is OK....Anything more than a tad ( 1" or 2" ) you might need a WD hitch to level you out and tighten up the trailer / TV combination.
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Old 07-06-2014, 10:23 PM   #5
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Good points-

I will get the weights and measure the tongue weight.

Correct, it does not have the front trunk.

Regarding level, it is level within 1.5 inch (tongue higher).

Regarding suspension (suburban.& honda pilot) my guess it is well within each vehicle's capability. We can verify w/the weights.
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Old 07-07-2014, 04:39 AM   #6
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Quote:
Originally Posted by bjlakatos View Post
Good points-

I will get the weights and measure the tongue weight.

Correct, it does not have the front trunk.

Regarding level, it is level within 1.5 inch (tongue higher).

Regarding suspension (suburban.& honda pilot) my guess it is well within each vehicle's capability. We can verify w/the weights.
Here is a inexpensive way to weigh your tongue, it work well.
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Old 07-07-2014, 09:42 AM   #7
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Quote:
Originally Posted by bjlakatos View Post
Good points-

I will get the weights and measure the tongue weight.

Correct, it does not have the front trunk.

Regarding level, it is level within 1.5 inch (tongue higher).

Regarding suspension (suburban.& honda pilot) my guess it is well within each vehicle's capability. We can verify w/the weights.
In addition to adding tongue weight, seems like you would be better off with 1 1/2" low (or more) rather than 1 1/2" high tongue.
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Old 07-07-2014, 10:42 AM   #8
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One point not mentioned, Tire Pressure, make sure your tires are up to the recommended pressure. Low tires will allow too much side wall flex causing side to side sway also
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Old 07-07-2014, 11:16 AM   #9
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Quote:
In addition to adding tongue weight, seems like you would be better off with 1 1/2" low (or more) rather than 1 1/2" high tongue height.
Yes, lower is better than a higher tongue height. ....That could be the problem. Can you flip the drawer-bar over to lower it a bit?
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Old 07-07-2014, 08:55 PM   #10
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Weight responses & other Updates

Quote:
Originally Posted by palehorse89 View Post
I am going to start with questions for you:
What does the trailer weigh loaded, ready to go?
How much tongue weight does it have when loaded ,ready to pull?
Suppose to be 10 - 15 % of the total weight on the tongue.
I have not had it on a scale so the GVWR and Dry weights are per the data plate

GVWR 3000#
Dry: 2200#

(added microwave coffee pot 2 gal water and propane cylinder)
Tongue weight--ready to pull (Sherline scale): 240#(11%)
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Old 07-07-2014, 08:59 PM   #11
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Draw bar

Quote:
Originally Posted by Superslif View Post
Yes, lower is better than a higher tongue height. ....That could be the problem. Can you flip the drawer-bar over to lower it a bit?
Most recently (towing behind the suburban) I used a 5.25" drop hitch to get it near level. It was about 1.5" (or less) high (my guess).
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Old 07-07-2014, 09:04 PM   #12
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Tire Update:

I also wanted to add that the I watch the tire pressure religiously.

At the mention of tires, I went and checked the wear for anomalies. The tire wear was unusual, both tires the same. It was high in the center 1/3 of the tire and more warn on the left and right side of both tires. The wear on the edges did not appear to be warn like the tires were underinflated. it was almost as if the tire was manufactured that way (no smooth transition between low and high). I checked the spare and it was uniform height (perfectly flat) as you would expect.

I took the tires into the tire shop. They suggested one of the following; the Rims were bent, axle was bent or it was under inflation. No visible damage to the axle. I verified toe in/tow out was off by less than 1/8 inch.
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Old 07-07-2014, 09:38 PM   #13
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Not that I haven't done it myself a few times, but almost all ST tires have a max speed of only 65mph. Being that these are 13inch tires, I'd keep it closer to 60mph.

If it still sways at 60mph, get a 6.5 inch drop bar. Newer Suburbans have a high hitch opening, 6.5 inch drop is not unheard of. That's what my neighbor has to use on small utility trailers.

Is there anything hanging off the back or is it all factory? My pop up friends love to bring their bikes along by strapping them on top of the pop up roof. Where is the battery and propane tank?
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Old 07-07-2014, 10:02 PM   #14
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Quote:
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Not that I haven't done it myself a few times, but almost all ST tires have a max speed of only 65mph. Being that these are 13inch tires, I'd keep it closer to 60mph.

If it still sways at 60mph, get a 6.5 inch drop bar. Newer Suburbans have a high hitch opening, 6.5 inch drop is not unheard of. That's what my neighbor has to use on small utility trailers.

Is there anything hanging off the back or is it all factory? My pop up friends love to bring their bikes along by strapping them on top of the pop up roof. Where is the battery and propane tank?
Good point on the speed, I forgot to mention the tire shop says the speed rating is b or 31mph. Really?

Spare tire hanging off the back

Batt/propane in front
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