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Forum: Towing, Tow Vehicles & Hitches Today, 03:10 AM
Replies: 7
Views: 200
Posted By Profxd
Yes I do actually, one in particular stands out...

Yes I do actually, one in particular stands out to me and posting it would single that person out so I wonít. They had loaded the bed of the TV and tried to use the WDH to raise it up. In doing so...
Forum: Towing, Tow Vehicles & Hitches Yesterday, 04:56 PM
Replies: 7
Views: 200
Posted By Profxd
I have seen pictures of a lot of receivers flexed...

I have seen pictures of a lot of receivers flexed upward and bowed trailer A-frames from using too much bar tension on RV forums. The most given advice is to increase bar tension and add more weight...
Forum: Towing, Tow Vehicles & Hitches 07-15-2019, 04:43 AM
Replies: 54
Views: 3,272
Posted By Profxd
A fifth wheel articulated rig is not the same as...

A fifth wheel articulated rig is not the same as conventional towing with the connection point well behind the rear drive axle. The dynamics is quite different and so is the requirements to maintain...
Forum: Hitches, Couplers & Balls 07-13-2019, 07:49 PM
Replies: 12
Views: 659
Posted By Profxd
Vehicle manufacturers use SAE j2807 which...

Vehicle manufacturers use SAE j2807 which incorporates the j684 test requirements. Since actual Class V guidelines have yet to be released they almost have to be using Class IV which is based on...
Forum: Towing, Tow Vehicles & Hitches 07-11-2019, 08:08 AM
Replies: 131
Views: 8,782
Posted By Profxd
I agree that when you remove weight off the rear...

I agree that when you remove weight off the rear axle you reduce traction. So once a trailer starts to sway and the tires can no longer hold the rig will jackknife. So a rig with less weight on the...
Forum: Towing, Tow Vehicles & Hitches 07-11-2019, 03:42 AM
Replies: 131
Views: 8,782
Posted By Profxd
JMorgan, since you are an experienced trucker,...

JMorgan, since you are an experienced trucker, under what load are the rear axles when itís most likely to jackknife?
Forum: Towing, Tow Vehicles & Hitches 07-11-2019, 03:15 AM
Replies: 131
Views: 8,782
Posted By Profxd
70 years of experience? Unloading the front axle...

70 years of experience? Unloading the front axle does not cause sway to happen, how you load the trailer certainly does. Please everyone donít believe what you read on this or any forum, do your own...
Forum: Towing, Tow Vehicles & Hitches 07-10-2019, 03:24 AM
Replies: 8
Views: 302
Posted By Profxd
Follow Ford’s instructions for applying a WDH in...

Follow Ford’s instructions for applying a WDH in the vehicles users manual.
Forum: Towing, Tow Vehicles & Hitches 07-03-2019, 03:17 AM
Replies: 33
Views: 3,433
Posted By Profxd
I have to agree with PKI on how to adjust the...

I have to agree with PKI on how to adjust the loading in the trailer. Using this method I lowered my TW to 11.7% of trailer weight and still maintain stability at highway speeds. But it depends on...
Forum: Towing, Tow Vehicles & Hitches 06-29-2019, 05:44 AM
Replies: 201
Views: 13,755
Posted By Profxd
You can twist it around as much as you want but...

You can twist it around as much as you want but facts are facts. What Mr Klein states is true as it was quoted. Vehicle manufacturers support it, hitch manufacturers support it now as well. I hope...
Forum: Towing, Tow Vehicles & Hitches 06-28-2019, 07:51 PM
Replies: 201
Views: 13,755
Posted By Profxd
I for one have never said that a WDH should not...

I for one have never said that a WDH should not ever be used. I use one but use minimal tension on the bars. I can pull my trailer safely and confidently without one at 65 mph though. My only beef in...
Forum: Towing, Tow Vehicles & Hitches 06-28-2019, 05:52 PM
Replies: 201
Views: 13,755
Posted By Profxd
From Richard H Klein P E “The statement “too...

From Richard H Klein P E

“The statement “too much tongue weight can force the truck down in the back, causing the front wheels to lift to the point where steering response and braking can be...
Forum: Towing, Tow Vehicles & Hitches 06-28-2019, 10:33 AM
Replies: 201
Views: 13,755
Posted By Profxd
Ephraim, with all due respect you need to brush...

Ephraim, with all due respect you need to brush up on your vehicle dynamics. Steering out of a sway event is the absolute last thing you should do, yet you promoting it? There is straight line...
Forum: Towing, Tow Vehicles & Hitches 06-28-2019, 05:09 AM
Replies: 201
Views: 13,755
Posted By Profxd
Out of site is basically correct in regard to...

Out of site is basically correct in regard to removing weight off the rear axle. If you understand the difference between weight and mass then understanding it becomes clearer. Tires need weight to...
Forum: Towing, Tow Vehicles & Hitches 06-26-2019, 07:03 PM
Replies: 14
Views: 1,080
Posted By Profxd
Since they don’t say 50-100% and understeer...

Since they don’t say 50-100% and understeer gradient is solely dependent on the TV and hitch weight it sure looks like a limit. Ford states “Always use” when referring to the amount of FALR for the...
Forum: Towing, Tow Vehicles & Hitches 06-26-2019, 05:49 PM
Replies: 34
Views: 2,033
Posted By Profxd
Even though you havenít there are many that have...

Even though you havenít there are many that have had issues and most are lighter vehicles that are using high tension on the bars.
Forum: Towing, Tow Vehicles & Hitches 06-26-2019, 03:21 AM
Replies: 14
Views: 1,080
Posted By Profxd
As a FYI the root cause of porpoising is the...

As a FYI the root cause of porpoising is the trailer it’s self, pitching fore and aft is due to its loading/ weight distribution. The TV suspension and the WDH can aid as resistance to reduce it by...
Forum: Towing, Tow Vehicles & Hitches 06-26-2019, 03:06 AM
Replies: 14
Views: 1,080
Posted By Profxd
As mentioned above, youíre returning 50% or less...

As mentioned above, youíre returning 50% or less of the weight you lost to the front which is what most vehicle manufacturers set as the limit.
Forum: Towing, Tow Vehicles & Hitches 06-25-2019, 05:50 PM
Replies: 34
Views: 2,033
Posted By Profxd
Yep some hitches will create the very forces that...

Yep some hitches will create the very forces that the ESC wants to correct. This is the reason I will never use the Blue OX WDH.
Forum: Towing, Tow Vehicles & Hitches 06-25-2019, 05:33 PM
Replies: 14
Views: 1,080
Posted By Profxd
6 inches looks perfect.

6 inches looks perfect.
Forum: Hitches, Couplers & Balls 06-23-2019, 09:27 AM
Replies: 67
Views: 4,591
Posted By Profxd
FYI 12k and 14k bars are side specific with the...

FYI 12k and 14k bars are side specific with the notches in the end offset to one side.
Forum: Hitches, Couplers & Balls 06-22-2019, 03:45 PM
Replies: 67
Views: 4,591
Posted By Profxd
A few questions for the OP. First how much use...

A few questions for the OP. First how much use since the last weigh in? Is there an increase in the up and down play in the receiver. What about the pin hole? As others have stated it may be time to...
Forum: Towing, Tow Vehicles & Hitches 06-22-2019, 01:53 PM
Replies: 130
Views: 5,902
Posted By Profxd
HD trucks can handle more FALR because they can...

HD trucks can handle more FALR because they can maintain understeer with it. Front to rear tire pressure offsets help maintain understeer on HD trucks but you won’t find any half tons with this...
Forum: Towing, Tow Vehicles & Hitches 06-22-2019, 11:34 AM
Replies: 130
Views: 5,902
Posted By Profxd
8,000 lbs of Jayco 28RBS. No Nissan says 50% max...

8,000 lbs of Jayco 28RBS. No Nissan says 50% max FALR so no they say itís not best to have all weight returned to the front. Just like the front there are consequences to removing too much off the...
Forum: Towing, Tow Vehicles & Hitches 06-21-2019, 06:18 AM
Replies: 130
Views: 5,902
Posted By Profxd
Warning

Iíll be traveling from the beach heading west with my front axle weighing 200lbs less then unloaded. Apparently Iím a hazard to myself and everyone around me. Winds gusting to 25 mph so be safe!
Forum: Towing, Tow Vehicles & Hitches 06-20-2019, 02:14 PM
Replies: 130
Views: 5,902
Posted By Profxd
No facts and no references to support your claims...

No facts and no references to support your claims as usual. To the people that want to know the truth please do your own research, donít believe what you read on forums. Once you understand the basic...
Forum: Towing, Tow Vehicles & Hitches 06-20-2019, 10:22 AM
Replies: 130
Views: 5,902
Posted By Profxd
Please explain in detail how the wdh will make...

Please explain in detail how the wdh will make those situations safer. To think itís the wdh that does make them safer is exactly my point, it doesnít.
Forum: Towing, Tow Vehicles & Hitches 06-20-2019, 06:04 AM
Replies: 130
Views: 5,902
Posted By Profxd
This is not my model, it’s how the PEs want it to...

This is not my model, it’s how the PEs want it to be which is why the vehicle manufacturers lowered the amount of FALR %. Every new person on the forum that asks about a WDH is told to return all the...
Forum: Towing, Tow Vehicles & Hitches 06-19-2019, 07:05 PM
Replies: 130
Views: 5,902
Posted By Profxd
Well based on measurements alone thereís no...

Well based on measurements alone thereís no change in height front or rear of the TV. HD trucks are engineered to carry weight at the rear and this is considered in the suspension and tires. Why do...
Forum: Towing, Tow Vehicles & Hitches 06-19-2019, 09:44 AM
Replies: 130
Views: 5,902
Posted By Profxd
What makes this safer then it was before? Nothing.

What makes this safer then it was before? Nothing.
Forum: Towing, Tow Vehicles & Hitches 06-18-2019, 02:00 PM
Replies: 130
Views: 5,902
Posted By Profxd
4900 rawr, +/- 4600 raw .

4900 rawr, +/- 4600 raw .
Forum: Towing, Tow Vehicles & Hitches 06-17-2019, 03:12 PM
Replies: 130
Views: 5,902
Posted By Profxd
I’m hoping to have a 25 or 27 by the end of this...

I’m hoping to have a 25 or 27 by the end of this year.
Forum: Towing, Tow Vehicles & Hitches 06-17-2019, 09:03 AM
Replies: 130
Views: 5,902
Posted By Profxd
Hereís my current rig loaded up for a week trip....

Hereís my current rig loaded up for a week trip. No airbags, Timbrens, or helper springs with no WD bars. TW in the 940 to 1000lb range and still carries over 4,000lbs on the front axles.
Forum: Towing, Tow Vehicles & Hitches 06-17-2019, 06:50 AM
Replies: 201
Views: 13,755
Posted By Profxd
If the trailer wasn’t loaded to travel then you...

If the trailer wasn’t loaded to travel then you will probably need to make adjustments anyway. Start over and readjust the hitch per the TV manufacturers guidelines.
Forum: Towing, Tow Vehicles & Hitches 06-16-2019, 04:59 AM
Replies: 130
Views: 5,902
Posted By Profxd
Thatís pretty lame for a 1 ton TV. 25 years of...

Thatís pretty lame for a 1 ton TV. 25 years of using 3/4 ton TVs and none of them raised more than 7/8 in at the front with 1,000 lbs TW. Once I would get past 50% FALR handling went right down the...
Forum: Towing, Tow Vehicles & Hitches 06-15-2019, 08:15 AM
Replies: 130
Views: 5,902
Posted By Profxd
Also let AndrewT know that what he does is wrong....

Also let AndrewT know that what he does is wrong. He uses this principle on many of his combinations. He purposely reduces TW of the trailer by relocating batteries, and reducing propane weight on...
Forum: Towing, Tow Vehicles & Hitches 06-15-2019, 05:25 AM
Replies: 130
Views: 5,902
Posted By Profxd
It is truth and in deed fact fully supported by...

It is truth and in deed fact fully supported by many PEís. Please post your references to this being false.

Hereís just one that supports this as fact.
ď Effects if Weight Distributing Hitch...
Forum: Towing, Tow Vehicles & Hitches 06-14-2019, 07:43 PM
Replies: 130
Views: 5,902
Posted By Profxd
Iíll add that a properly designed and loaded...

Iíll add that a properly designed and loaded trailer with a adequate TV doesnít need the sway control from a WDH to be stable. Sorry hitch police this is fact.
Forum: Tow Vehicles 06-05-2019, 03:17 AM
Replies: 111
Views: 8,792
Posted By Profxd
I think you should just stay home and camp in...

I think you should just stay home and camp in your own driveway then. Much safer that way.
Forum: Towing, Tow Vehicles & Hitches 05-28-2019, 03:05 PM
Replies: 161
Views: 9,659
Posted By Profxd
Wait time out! Understeer/Oversteer misuse...

Wait time out! Understeer/Oversteer misuse infraction! A vehicle alone with more weight on the front is in a understeer condition. A vehicle/trailer with high TW shifts to oversteer. The same combo...
Forum: Towing, Tow Vehicles & Hitches 05-28-2019, 08:44 AM
Replies: 161
Views: 9,659
Posted By Profxd
FYI oversteer is the undesirable state when...

FYI oversteer is the undesirable state when towing a trailer not understeer.
Forum: Towing, Tow Vehicles & Hitches 05-28-2019, 03:20 AM
Replies: 161
Views: 9,659
Posted By Profxd
Simple using a WDH removes weight off the rear...

Simple using a WDH removes weight off the rear tires reducing rear cornering stiffness. Every vehicle can tolerate some weight removed off the front axle before steering and handling is effected...
Forum: Towing, Tow Vehicles & Hitches 05-27-2019, 05:50 PM
Replies: 161
Views: 9,659
Posted By Profxd
Yes an absolute fact proven by mathematics,...

Yes an absolute fact proven by mathematics, simulation, and real testing. More weight on the rear tires is just one advantage of what a TV of larger mass contributes. Overall TV to trailer weight...
Forum: Towing, Tow Vehicles & Hitches 05-27-2019, 05:30 PM
Replies: 161
Views: 9,659
Posted By Profxd
Aleksander Hac, Daniel Fulk and Hsien Chen ...

Aleksander Hac, Daniel Fulk and Hsien Chen

“In contrast, stability with respect to the snaking motion depends on the parameters of both the towing vehicle and the trailer. More specifically, the...
Forum: Towing, Tow Vehicles & Hitches 05-27-2019, 05:17 PM
Replies: 161
Views: 9,659
Posted By Profxd
From N Zhang’s research on stability, rear tire...

From N Zhang’s research on stability, rear tire cornering stiffness is referred to as rear axle cornering stiffness.

“A short conclusion is that, an increasing rear axle cornering stiffness of the...
Forum: Towing, Tow Vehicles & Hitches 05-27-2019, 05:07 PM
Replies: 161
Views: 9,659
Posted By Profxd
Please get the facts straight. ďBack in 1951...

Please get the facts straight.

ďBack in 1951 Williams created a mathematical theory of the snaking of two wheeled trailers. The most important point in his analysis is a mathematical proof that...
Forum: Towing, Tow Vehicles & Hitches 05-27-2019, 04:59 AM
Replies: 161
Views: 9,659
Posted By Profxd
You are correct that both TV and trailer...

You are correct that both TV and trailer characteristics must be considered to create stability. WD used correctly requires minimal tension/torque to stay within the TVís maximum FALR limits.
Forum: Towing, Tow Vehicles & Hitches 05-26-2019, 06:49 PM
Replies: 161
Views: 9,659
Posted By Profxd
If you donít know how to setup the WDH, I would...

If you donít know how to setup the WDH, I would tow it home without it. But first off keep your speed down since instability is directly related to speed. Second make sure the trailer is level or at...
Forum: Towing, Tow Vehicles & Hitches 05-20-2019, 03:14 AM
Replies: 161
Views: 9,659
Posted By Profxd
The ”Hitch Police” step in to save the day!

The ”Hitch Police” step in to save the day!
Forum: Towing, Tow Vehicles & Hitches 05-19-2019, 11:45 AM
Replies: 161
Views: 9,659
Posted By Profxd
He is correct in that sway should be resolved...

He is correct in that sway should be resolved first and foremost by fixing the design and/or loading issues with the trailer not with the sway control on a WDH. They blame the hitch and the TV but...
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