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05-19-2021, 09:11 AM
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#81
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,669
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Quote:
Originally Posted by thewarden
Whether your hitch components are adding to the TV receiver or adding weight to the trailer tongue really does not matter, you are still adding to the tow vehicles cargo weight. As this weight is as far forward of the axles as you can get, very little will be taken up by the axles.
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Well, in this case it is 68#.
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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05-19-2021, 10:52 AM
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#82
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Rivet Master
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction
, Arizona
Join Date: Sep 2012
Posts: 6,223
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The most important question is not whether the proposed tow vehicle can pull the trailer, but can it stop the complete rig when going down slope in the mountains if the electric brakes on the trailer fail.
Do not exceed the recommended max combined weight.....
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
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05-19-2021, 01:37 PM
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#83
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Liquid Cooled
2017 27' Flying Cloud
Currently Looking...
Currently Looking...
Currently Looking...
near Indy
, Indiana
Join Date: Mar 2006
Posts: 745
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Quote:
Originally Posted by cru-in
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I generally think of a weight distributing hitch as a springy arch ... whatever is "arched" away from the pin is split roughly proportionally (not often equally) between trailer and truck. The overall system cg stays the same regardless of hitch, but wd hitches push the cg of the truck side of the equation forward and the cg on the trailer side aft - the net change in moment arm for the combination pretty much has to be zero. Even if we create a cantilevered arm from behind the trailer axles or ahead of the steering wheels, the sum of all the vectors will be zero. I'm not an ME, but this passes a sniff test.
I'm happy to change my mind, but this feels like freshman physics except for all the springs involved. Thought about replicating this with Legos, chopsticks, and rubber bands. That'd be kind of fun.
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05-19-2021, 05:10 PM
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#84
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,669
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Yes, it's a beam system. A bit more complex in that it has 3 load points to the ground and a swivel connection with springs as part of the beam.
I use 50/50 for the springs and struts. It's probably not exact, but pretty close.
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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05-20-2021, 11:38 AM
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#85
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Rivet Master
2017 25' International
West Lake Hills
, Texas
Join Date: Dec 2020
Posts: 1,644
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Adverse driving conditions
Yesterday, we drove through moderate to light rain on mostly flat terrain, then a 25 mph crosswind with rain, then just the wind. Don’t know how high the gusts were.
2020 F-150 max tow, 2017 Intl 25FB, PP hitch, weighed rig two days earlier, trailer perfectly level.
It was not a fun drive. I slowed down to 45 mph because the steering felt squishy. I wished that I had a big Diesel engine holding down the front axle. But maybe that wouldn’t have helped.
Adverse conditions might push a less-than-ideal TV out of the comfort zone.
The June 2021 RV magazine has a guide to towing including specs on all the trucks. I haven’t read it yet. DW got to it first.
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05-20-2021, 02:09 PM
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#86
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Rivet Master
2019 27' International
Western NC
, North Carolina
Join Date: Jun 2019
Posts: 860
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It would have today’s drive was 120 miles in a 30 to 45 mph crosswind. Towing my 27 FBQ International with the F350. Never felt any influence due to the wind, could see it it hear it but didn’t push things around.
__________________
2023 Van Leigh Vilano 320GK
2019 International Serenity 27 FBQ “TC Escape” SOLD
2019 Ford F-350 Platinum
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05-20-2021, 07:42 PM
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#87
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Rivet Master
2015 25' Flying Cloud
Schaumburg
, Illinois
Join Date: Jun 2020
Posts: 635
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Quote:
Originally Posted by Fungus
Yesterday, we drove through moderate to light rain on mostly flat terrain, then a 25 mph crosswind with rain, then just the wind. Don’t know how high the gusts were.
2020 F-150 max tow, 2017 Intl 25FB, PP hitch, weighed rig two days earlier, trailer perfectly level.
It was not a fun drive. I slowed down to 45 mph because the steering felt squishy. I wished that I had a big Diesel engine holding down the front axle. But maybe that wouldn’t have helped.
Adverse conditions might push a less-than-ideal TV out of the comfort zone.
The June 2021 RV magazine has a guide to towing including specs on all the trucks. I haven’t read it yet. DW got to it first.
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I had a very similar experience a year back when I pulled my 25’ FC with an F150. Posting these experiences seems to draw all kinds of contradictions in the point of view, but I still think most folks would be much better off with a 3/4 ton (or 1 ton) class tow vehicle for the 25’ and up airstream trailers. Sure, you *can* tow them with 1/2 ton vehicles, but in poor conditions it’s a white knuckle, elevated stress experience. That’s really the only reason I added here, I’ve shared my experience in other threads. If you are an accomplished driver with good skill and experienced at towing and the dynamics that come with it, and are comfortable in otherwise uncomfortable conditions, the pure numbers based assessment will support your view that 1/2 ton is enough, but my experience is the real world conditions make the 3/4 ton class vehicles the better choice. That’s just my experience based feedback, and I realize there is a wide range of opinions but this is a safety critical decision, much more at stake than simple personal preference. Hope that helps ...
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05-20-2021, 08:30 PM
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#88
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Rivet Master
2017 25' International
West Lake Hills
, Texas
Join Date: Dec 2020
Posts: 1,644
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Thanks for taking the time to post. Your real world experience pushes me ever further into the camp of 3/4 ton or better. I’d trade tomorrow if I could find a new F-250 or F-350 near the beautiful Cedars of Lebanon state park.
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05-20-2021, 09:01 PM
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#89
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Rivet Master
2015 25' Flying Cloud
Schaumburg
, Illinois
Join Date: Jun 2020
Posts: 635
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Yea thats one more area where good fortune landed in my lap. I had that white knuckle experience last year, and ordered a new F-250, I took delivery in Dec of 2020. I happened to be at my dealer for the first service interval (simple oil change, mine is a gas engine) and the lot was a ghost town, only a handful of USED trucks sitting there. They are not a huge volume truck dealer, but normally have a good selection, more 150 than 250 but always some around ... not now. This marketplace for RV is pure chaos ... hard to get trailers OR tow vehicles ... I am thankful I already have what I want, and thankful I made the decision to upgrade early enough that I avoided this current market condition. Wish you the best of luck searching, hopefully this is only a few months before the supply returns to decent levels.
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05-21-2021, 06:30 AM
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#90
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2020 Globetrotter 25 FBT
2020 25' Globetrotter
Wildwood
, Missouri
Join Date: Aug 2009
Posts: 2,607
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Just makes me think something may not be right in your set up. I switched to Bilstein shocks, went to 10 ply tires, and added a Roadmaster Active Suspension and I’ve been through some crazy winds going out across Kansas and coming back across Oklahoma. I certainly can feel the wind, but it’s not a lot more than I feel when I’m not hooked up to the trailer. Just something to think about before you lay out the $$$ for a new truck.
__________________
2020 25GT FBT
2012 Toyota Tundra Dbl Cab, 5.7 4x4
Previous AS trailers: (04) 19’ Bambi, and (11) FC 23FB
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05-21-2021, 08:37 AM
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#91
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Rivet Master
2017 25' International
West Lake Hills
, Texas
Join Date: Dec 2020
Posts: 1,644
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The combination of rain and wind made me slow down. I never felt that I had any sway just the squishy steering.
Nearly full water because we were unsure of water usage and availability but I’m dumping that for the next 10 days. Waste tanks at 20%.
I’m moving all the cargo except the generator (which I should have left at home) to the trailer. The only reason I brought it was because we boondocked for two nights, and the fridge was not running on propane. Fridge started behaving after restarting it 10 or so times.
Front wheel-well within 1/4 inch of unhitched. 7.5 inches on the WD jacks and highest hole. Two washers in the tilt. Trailer is perfectly level. Trailer rear axle heavier than front axle.
Should trailer be slightly nose down?
Scale weights:
1. WD activated
A. TV front: 3200
B. TV rear: 3780
C. Trailer: 6000
2. WD deactivated
A. TV front: 2800
B. TV rear: 4300
C. Trailer: 5860
3. TV only
A. Front: 3260
B. Rear: 2660
4. Trailer only
A. Front: 2580
B. Rear: 3300
5. TV GVWR: 7000
6. TV weight with trailer: 6980 (too close)
7. Trailer GVWR: 7300
8. Trailer weight: 7060
9. Tongue weight: 1180, 17%
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