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Old 10-12-2016, 09:33 AM   #393
1 Rivet Member
2013 20' Flying Cloud
minneapolis , Minnesota
Join Date: Aug 2016
Posts: 10
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Originally Posted by Cbfreq View Post
The trailer weighs less than 7000 pounds and the Tongue weight is less than 600 pounds.I got that from a worksheet that the former owner had filled out but I did not see the weight scale ticket.I was under the impression that the older airstreams weigh less than the newer airstreams.My employer from when I was driving truck has scales so I was going to go there and check it out soon.He will not charge me a penny and I can take my time and get all the measurements I want.I am a little concerned about the short wheelbase of the TV and the long 31 foot trailer giving me problems with sway.Is it just the Porsche or does the tourag have an anti-lock brake/ stability system that senses Sway and applies the brakes on the outside wheel of the TV to counteract it? Either way I was thinking about using two friction sway control units.On an unrelated issue I have a trailer interface module but I cannot seem to find the harness that goes from the trailer interface module back to the towbar for a reasonable price, VW wants $450. Thank you to both of the posters that replied I appreciate your input.

I went thru retrofitting a tow package on a Cayenne. It will be similar (electronically) on a Tourag. The parts are not cheap and the system runs thru the Can/BUS system. So the electronic brake controller plugs in by the driver and has to get wired to get the brake signal and also to send the correct signal to the 7 pin.... I believe all that is controlled thru the can/bus system.

Your other option is to bypass the can/bus all together and route the wiring all back to the rear lights and hardwire the 7pin connector and bypass the can/bus.

Regarding the sway. I believe the concern is that the trailer has sway. The cayenne or Tourag stability control system controls the stability of the TV. The force diagram of a trailer swaying is coupled to the TV thru a pin joint (the hitch),and the forces are in the cross-road direction. That force is a coupling of momentum (M*V). The short wheel base and contact patch area of the TV tires are not desirable to control sway of a trailer. Having sufficient tongue weight (10-15%) is necessary to move the center of mass forward on the trailer itself to shorten the effective moment arm of forces to induce the sway.

In my opinion that is the real safety question of pulling a large trailer... I believe that the Cayenne or Tourage has the ability to pull sub 7000 pounds and since the trailer has brakes, it is probably safe at braking that trailer in may conditions, but the limitation will be having sufficient tongue weight vs. gross trailer vehicle weight.

So if a Tourage has a 750LB tongue weight limit (if you read the threads, this is correlated back to axel weight limits... pending some assumptions about cargo in the TV)... then a gross vehicle weight for 15% is 5000lb and 7500lb for 10%.

I have never tried it, but Hayes does make a dynamic brake sway controller to control the trailer brakes if it senses sway on the trailer. It connects in-line between the ECB and the trailer brakes. This may be a better option because it applies a force at the trailer wheels where you have the best chance of creating an opposing torque (perpendicular distance * force) to counteract the forces creating the sway. I think the cost is around $350

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Old 10-12-2016, 10:04 AM   #394
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Mountain View , California
Join Date: May 2015
Posts: 161
Use ProPride or Hensley and you will not experience sway. I towed 33 ft long trailer with BMW X5 through strong cross-winds, including those in Wyoming. Sway is not an issue with these hitches. And this was not with Airstream, but SOB which has worse aerodynamic profile.

SOB 33 ft trailer
Propride 1400
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Old 10-12-2016, 11:42 AM   #395
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2016 23' Flying Cloud
Hillsborito , Oregon
Join Date: Aug 2016
Posts: 11
FWIW, in response to Don and his newly acquired AS, I also vote to get a WD for safety sake. I have a 2014 Touareg TDI pulling a 23D and I currently use Equal-i-zer, so far so good and tad bit cheaper than other brands.
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Old 10-12-2016, 09:22 PM   #396
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1978 31' Sovereign
Crosby , Minnesota
Join Date: Jul 2016
Posts: 5
very small budget

I have ay small budget for my travel trailer. My first Airstream which I call the wrinkled Twinkie I bought off the side of the road for $700. But I wanted a mid seventies 31 foot with awnings on both sides aluminum propane tanks and aluminum wheels in good enough shape to use as purchased. I bid $4,000 on more than 30 Trailers on eBay that met that criteria. The one that I finally got was in better shape then most of the ones I did not win. We have taken the wrinkled Twinkie To Ely Minnesota Which is a 150 mile trip for us. I also used it as a place to stay when I was working two hundred and fifty miles from home. It was a year-and-a-half ago when we got the 31-foot, we have taken it to Mount Rushmore and too many u.s. forest service and State Forest Campgrounds near our home. Until a few weeks ago we had to borrow vehicles to pull our trailers. I am a professional auto mechanic so I have many friends and relatives Willing to allow me to use their vehicles intrade for Discounts on service and repair.

I like the fact that the bulbs are monitored when using the trailer interface module and I also like the shift strategies and different engine management strategies via the can bus interface. All I need is the plug for the trailer interface module and I can build the rest of the harness back to the tow bar myself.

My Touareg has the same contact patch as my brother's Expedition but with the shorter side wall I believe it is more resistant to side loading. It has comparable or better brakes also.

I thought that there was an Airstream accessorie That used the trailer brakes to control sway. My dream would be to design or adapt anti- lock trailer brake system with built-in sway control. How about disc brakes. Those things would be for another thread, as I would not want to hijack this thread.

Thank you to everyone who has contributed their opinions on my situation and I apologize for the speech to text system I am using to write this.
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Old 10-12-2016, 09:55 PM   #397
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1978 31' Sovereign
Crosby , Minnesota
Join Date: Jul 2016
Posts: 5
what I was talking about

2008 Porsche Cayenne marketing info.

"Trailer Stability Control detects any pendulum motion on the trailer and intervenes by applying the brakes
individually as required in the interest of enhanced brake stability."
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Old 10-12-2016, 10:27 PM   #398
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2015 30' FB FC Bunk
2012 25' FB Flying Cloud
Golden , Colorado
Join Date: Jun 2013
Posts: 294
Do not bypass the factory tow package with integrated sway control. I was using a recommended sway control WD pulling the 30' Bunk with the ML350 and came out from under an over pass in the middle of a curve when a very strong prairie gust of wind sent the whole rig into an very sudden and violent sway that was only saved by the factory sway control. There was absolutely no way I could have saved it. I would have wrecked for sure if not for the factory sway control system fully engaging. My hands never left the steering wheel and I regularly practice the trailer brake grab.

Though I am adamantly apposed from a personal experience/opinion standpoint if you are going to insist, install the factory tow/sway control system then have Andy at CANAM reinforce the hitch (he did my ML350), and use a Pro-Pride with 1,200 - 1,400 pound bars. I went Pro-Pride after I almost wrecked above. There is no comparison to the safety and stability period. Even after buying the 2015 Chevrolet 2500 HD I still use the Pro-Pride.

All is well until you are put into emergency situations. With the ML350 pulling the 30' I never felt safe. I will take the security and safety of my larger TV with the larger trailers. It has been repeatedly demonstrated over the years that you can pull an airstream with anything. Does not make it safe for you or often more importantly others.
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