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Old 05-15-2013, 11:32 PM   #11
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Originally Posted by OldCoot View Post

Don't think that's quite right, but will defer to the experts. The wdh increases the downward force on the ball, but lifts the whole hitch head and thus decreases the actual load on the rear axle of the tv and increases it on the trailer & tv front axle.
I'm no expert either, but spent a fair amount of time on this concept before I felt safe with my setup.

WDH makes no change to weight on the ball, the spring bars are attached below the ball on the WDH. It creates a static lift at the head (not ball) and implements a lifting fulcrum at the receiver. It lifts up on the rear of the receiver, and pushes down forward part of the receiver. This action of static pressure creates the redistribution of weight at the tow vehicle.

It causes weight on the rear axle to be redistributed to the front axle. At the same time the static pressure caused by the spring bar adds some weight to the trailer axle.

The weight at the ball stays the same, which isn't a problem. The ball is likely rated way above the trailer tongue weight. The crucial part is the ability of the hitch receiver tube to tolerate the torsion of the static pressure created by the spring bar. Normally with the AFrame trailers and light weight WDH systems we are talking about small amounts of weight and torsion the dynamics aren't a problem. I've not weighed my setup, only measured rear drop and front lift before and after WDH. My Jeep settles well, and I've not seen any undue stress at the receiver.

I'm comfortable and the TV and trailer feels good when towing. Steering and braking are better after WDH but my case is not the same as someone else's.

The key to the ball weight not changing is where the bars are connected to the hitch assembly, which is below the ball, part of the hitch head assembly which transfers the torsion to the shank and into the receiver tube. The rest of the force transfers to the trailer frame and ultimately to the trailer axle.
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2011 FR Rockwood Premiere A126 Hard Side
TV=2011 Jeep Wrangler Sahara 2 Dr
Reese 66065 WDH, Curt WDH Shank #17120
Prodigy P2 Brake Controller, Mopar 7-pin Harness
B&M Transmission Cooler (#70268)
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Old 05-16-2013, 03:52 PM   #12
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I wanted to post a correction to my earlier thread after Old Coot - I misread Old Coot's reply.

Language and understanding of the dynamics of where weight is and how it's transferred is important.

Weight does increase at the ball, but not the tongue (Tongue weight stays the same with our without WDH with the exception of the added weight of the hitch head and heavier shank that the head mounts to). The description Old Coot gives is correct, and the downward force is counteracted by lifting forces creating that 'torsion' that I talked about earlier (lifting on the rear of the receiver tube while the tongue weight rests toward the front of the receiver tube).

You can read this thread if you want a good solid description of how it all works, including how to do the calculations of weight movement: RV.Net Open Roads Forum: Towing: Weight Distribution (WD) Hitch --- How it Works

It's a rather long thread at 18 pages, but the first post contains a very good summary of the entire thread that can be digested in a few minutes versus the reading all the pages.
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TV=2011 Jeep Wrangler Sahara 2 Dr
Reese 66065 WDH, Curt WDH Shank #17120
Prodigy P2 Brake Controller, Mopar 7-pin Harness
B&M Transmission Cooler (#70268)
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Old 05-16-2013, 11:32 PM   #13
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Originally Posted by jherrington93 View Post
Can anyone who owns a late model Rockwood Freedom 2280/Flagstaff MAC 228 (with shower cassette, H/W, fridge, A/C, heater) give me approximate numbers for Gross Weight (no cargo) and Tongue Load? My wife and I are thinking of buying a new one, but I'm trying to determine if my TV is up to the challenge of pulling this safely. I know the Dry Weight and Dry Tongue Load, but need to know what these become once a full propane tank and battery are added in.
FYI my 228 with shower's tongue weight with cold and hot water fully loaded, LP and battery on the front is 420 lbs. Putting the battery in the back lowers that to 365 lbs.
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Old 05-17-2013, 05:21 PM   #14
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On your 2280, would you happen to have a pic of your battery wiring hookup?
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Old 05-17-2013, 10:25 PM   #15
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I have a Mac 228 without toilet, shower and hot water heater. I never haul with water in my fresh water tank. Depending on how I load mine, my tongue weight has gone from 360 to 430 pounds. That's with one 20 pound propane bottle and a group 24 battery.
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Old 05-17-2013, 10:55 PM   #16
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Dealer didn't end up doing the sealed interior battery because tongue weight was sufficient without it. I can tell you the revised plan was to put it under the rear-most dinette bench because it wouldn't fit under gaucho. In that bench there is part that is screwed down (instead of removable for storage access). They unscrewed that and verified it would fit with a vent to the outside. I choose to not worry about having a battery under my kids while they're eating (although I'm sure it would have been fine) because I didn't need the tongue weight reduction after all.
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