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Search: Posts Made By: Profxd
Forum: Towing, Tow Vehicles & Hitches 05-07-2022, 11:11 AM
Replies: 78
Views: 3,553
Posted By Profxd
Your analogy is a very good one. Unfortunately...

Your analogy is a very good one. Unfortunately most on these forums believe as long as you are in the weight limits everything will be good. If not then tighten up the WDH little more or spend $2k...
Forum: Towing, Tow Vehicles & Hitches 05-06-2022, 03:44 AM
Replies: 78
Views: 3,553
Posted By Profxd
You guys as usual are over thinking something...

You guys as usual are over thinking something simple. The WD is not added the trailer GVW in the manufacturers rating.
Forum: Towing, Tow Vehicles & Hitches 10-02-2021, 05:28 AM
Replies: 34
Views: 1,592
Posted By Profxd
If the trailer is loaded heavy at the...

If the trailer is loaded heavy at the ends(front/back) versus at the center it’s more prone to pitch forward and aft on rough roads. The trailer teeters at the axles moving the TV with it. A trip to...
Forum: Hitches, Couplers & Balls 08-20-2021, 09:37 AM
Replies: 75
Views: 5,535
Posted By Profxd
Sorry there are no hang ups. The HA/PP can never...

Sorry there are no hang ups. The HA/PP can never be considered a tongue extension because it is not rigid from trailer tongue connection point to the vehicle receiver. The small amount of vertical...
Forum: Hitches, Couplers & Balls 08-20-2021, 03:11 AM
Replies: 75
Views: 5,535
Posted By Profxd
The numbers show that the HA/PP is acting like a...

The numbers show that the HA/PP is acting like a hitch extension, pulling more weight off the TV front axle than most other WDH types. Pushing the connection point back has a negative impact on TV...
Forum: Hitches, Couplers & Balls 08-19-2021, 06:05 PM
Replies: 75
Views: 5,535
Posted By Profxd
When I was doing research I found two other data...

When I was doing research I found two other data sets on other vehicles that showed the same behavior. At that point I gave up on the idea that I would try to use a HA/PP for just its sway damping...
Forum: Hitches, Couplers & Balls 08-19-2021, 05:40 PM
Replies: 75
Views: 5,535
Posted By Profxd
I used a set he posted sometime ago but hear is...

I used a set he posted sometime ago but hear is his explanation of that very set.
Forum: Hitches, Couplers & Balls 08-19-2021, 06:18 AM
Replies: 75
Views: 5,535
Posted By Profxd
Hereís a quick and easy check you can do. Do a...

Hereís a quick and easy check you can do. Do a search for the scale weight tickets that Robert Cross has posted a million times and then calculate the length of the lever arm required to remove...
Forum: Hitches, Couplers & Balls 08-18-2021, 03:32 AM
Replies: 75
Views: 5,535
Posted By Profxd
You are calculating the problem as if the HA/PP...

You are calculating the problem as if the HA/PP lengthens the trailer wheelbase and it doesnít. It acts as a hitch extension not a Aframe extension. If you were to extend the trailerís Aframe you get...
Forum: Hitches, Couplers & Balls 08-17-2021, 03:38 PM
Replies: 75
Views: 5,535
Posted By Profxd
From Draw-Tite

From Draw-Tite
Forum: Hitches, Couplers & Balls 08-17-2021, 03:34 PM
Replies: 75
Views: 5,535
Posted By Profxd
I would say pretty close but you must also...

I would say pretty close but you must also consider that the trailer TW applied further rearward also has levered advantage by removing more weight off the TV front axle. More spring bar torque is...
Forum: Hitches, Couplers & Balls 08-17-2021, 11:55 AM
Replies: 75
Views: 5,535
Posted By Profxd
What you see in the picture is exactly how a...

What you see in the picture is exactly how a receiver is tested. The receiver is rated with the ball mount inserted and those forces applied to the ball connection point. As you increase the distance...
Forum: Hitches, Couplers & Balls 08-17-2021, 03:38 AM
Replies: 75
Views: 5,535
Posted By Profxd
The receivers ability to handle trailer tongue...

The receivers ability to handle trailer tongue weight is built into it by design and verifiable by the standard.
Forum: Hitches, Couplers & Balls 08-16-2021, 05:35 PM
Replies: 75
Views: 5,535
Posted By Profxd
The Hensley and PP hitch does present a bit of a...

The Hensley and PP hitch does present a bit of a problem. First off does the HA/PP meet V5/j684 compliance? Can someone contact Hensley or PP for the answer? Second with all other WDH types itís...
Forum: Hitches, Couplers & Balls 08-15-2021, 06:29 PM
Replies: 75
Views: 5,535
Posted By Profxd
No this is incorrect. The receiver gets a trailer...

No this is incorrect. The receiver gets a trailer “tongue weight rating” end of story. There is absolutely no such thing as “receiver weight rating”.
Forum: Towing, Tow Vehicles & Hitches 07-28-2021, 03:31 AM
Replies: 179
Views: 25,983
Posted By Profxd
The title of the thread should be “Too much WDH...

The title of the thread should be “Too much WDH tension was damaging my Airstream”. You try and over tension a WDH on a class 2b vehicle and that’s asking for trouble. They need very little WDH...
Forum: Towing, Tow Vehicles & Hitches 07-22-2021, 05:47 AM
Replies: 91
Views: 7,048
Posted By Profxd
People need to understand that a WD doesnít...

People need to understand that a WD doesnít physically move anything. Weight and mass are not the same thing. Weight is a force and a WD hitch will reduce the downforce at the TV rear axle and...
Forum: Hitches, Couplers & Balls 07-12-2021, 07:09 PM
Replies: 34
Views: 2,979
Posted By Profxd
Adding the weight of a full tank of water...

Adding the weight of a full tank of water increases the TW to 750lbs you have raised the TW% from 11.3% to 13%. This is the most likely reason for the improvement but sure go ahead and try it with...
Forum: Tow Vehicles 06-26-2021, 05:40 AM
Replies: 38
Views: 2,432
Posted By Profxd
Front to rear tire pressure differential effects...

Front to rear tire pressure differential effects how the vehicle handles, it’s not just about by load. It changes how the vehicle reacts to steering input.
Forum: Hitches, Couplers & Balls 06-20-2021, 02:07 PM
Replies: 34
Views: 2,979
Posted By Profxd
So maybe it’s not a hitch/adjustment problem. You...

So maybe it’s not a hitch/adjustment problem. You have about 11.3% TW which is on the low side for a RV TT. If the weight inside the trailer is not correctly distributed you can have sway problems at...
Forum: Tow Vehicles 04-15-2021, 06:51 PM
Replies: 2
Views: 392
Posted By Profxd
What determines GVWR? Targeted vehicle class,...

What determines GVWR? Targeted vehicle class, FMVSS, manufactures standards for durability, stability, and handling. There is no definitive answer/formula used to determine WCC/GVWR.
Forum: Tow Vehicles 01-08-2021, 07:54 PM
Replies: 27
Views: 5,477
Posted By Profxd
GM is now using VIN specific tow rating labels so...

GM is now using VIN specific tow rating labels so this vehicle has a maximum allowable TW of 840 lbs with a WDH. 2020 GM owners manual says a maximum weight carrying rating of 600lbs TW and 1000lbs...
Forum: Tow Vehicles 01-03-2021, 03:03 PM
Replies: 56
Views: 6,068
Posted By Profxd
Well thought out but if only were fact and not...

Well thought out but if only were fact and not opinion.
Forum: Tow Vehicles 01-03-2021, 06:55 AM
Replies: 56
Views: 6,068
Posted By Profxd
Bob, thereís something fundamentally wrong with...

Bob, thereís something fundamentally wrong with that depiction of how the Andersen hitch works. Apparently Brian doesnít see it nor did he answer the question that was asked. All you have to do is...
Forum: Tow Vehicles 01-02-2021, 05:31 AM
Replies: 56
Views: 6,068
Posted By Profxd
You forgot to post the pictures of your weigh...

You forgot to post the pictures of your weigh tickets in that response Bob.
Forum: Tow Vehicles 12-31-2020, 04:59 PM
Replies: 56
Views: 6,068
Posted By Profxd
The blind leading the blind!

The blind leading the blind!
Forum: Tow Vehicles 12-29-2020, 04:40 AM
Replies: 56
Views: 6,068
Posted By Profxd
We have argued this endlessly in the past so I...

We have argued this endlessly in the past so I wont hijack this thread explaining how you are wrong about FALR. Lower tongue weights reduce the need for WDH tension and itís far better to minimize...
Forum: Tow Vehicles 12-28-2020, 08:51 PM
Replies: 56
Views: 6,068
Posted By Profxd
No thatís not what Iím saying. In fact the main...

No thatís not what Iím saying. In fact the main purpose of the WDH is to keep the the rear axle within its rating but due to the addition of trailer tongue load only. If you can stay below RAWR using...
Forum: Tow Vehicles 12-28-2020, 05:50 AM
Replies: 56
Views: 6,068
Posted By Profxd
You are trying to shift load off the rear axle...

You are trying to shift load off the rear axle just so you can put more in the TV. This is misuse of a WDH. Follow the vehicle manufacturers for returning load to the front axle, they know the...
Forum: Towing, Tow Vehicles & Hitches 11-27-2020, 09:58 AM
Replies: 16
Views: 1,440
Posted By Profxd
Yes the H/PP design will raise the sway critical...

Yes the H/PP design will raise the sway critical speed to a high mph value even at 10% TW. It is in fact the ideal scenario when using the H/PP hitch since it adds an additional 80-100lbs far behind...
Forum: Towing, Tow Vehicles & Hitches 11-25-2020, 08:04 AM
Replies: 41
Views: 5,266
Posted By Profxd
Travelingman, the biggest issue you have is...

Travelingman, the biggest issue you have is tongue weight % which is 16.9% of the trailer weight not the hitch. The only way to solve your problem is to lower TW to be 14% or lower. The overall...
Forum: Hitches, Couplers & Balls 11-10-2020, 03:45 AM
Replies: 140
Views: 28,142
Posted By Profxd
Thereís a good reason vehicle manufacturers donít...

Thereís a good reason vehicle manufacturers donít rely on friction sway control. At best it may dampen minor oscillation at highway speeds but itís nearly worthless otherwise. It might raise the...
Forum: Tow Vehicles 11-03-2020, 05:51 AM
Replies: 691
Views: 77,864
Posted By Profxd
There is yet another geometric parameter...

There is yet another geometric parameter (dimension) that’s on the tow vehicle that could also drastically change the handling of near identical rigs. The best thing about lengthening this dimension...
Forum: Tow Vehicles 11-03-2020, 03:38 AM
Replies: 691
Views: 77,864
Posted By Profxd
It very realistic for any brand RV TT even though...

It very realistic for any brand RV TT even though many airstream trailers have low payload capacity. You have those that mount bikes, generators, fire wood way out on the rear bumper. You are...
Forum: Tow Vehicles 10-31-2020, 06:15 PM
Replies: 691
Views: 77,864
Posted By Profxd
This near exact scenario is reported regularly on...

This near exact scenario is reported regularly on RV forums across the web. When someone reports a bad handling combination thereís always someone with the same truck same trailer and hitch...
Forum: Tow Vehicles 10-30-2020, 11:27 AM
Replies: 691
Views: 77,864
Posted By Profxd
Then maybe you should stop giving out advice then...

Then maybe you should stop giving out advice then to those that do have problems.
Forum: Tow Vehicles 10-30-2020, 03:45 AM
Replies: 691
Views: 77,864
Posted By Profxd
Consider this scenario. There are 2 towing...

Consider this scenario. There are 2 towing combinations. Both are using the exactly the same TV, same driver and TV loading, hitch, FALR, both trailers weigh the same with the same TW. One rig tows...
Forum: Tow Vehicles 10-25-2020, 04:27 AM
Replies: 691
Views: 77,864
Posted By Profxd
The vehicle manufacturers make it very clear not...

The vehicle manufacturers make it very clear not to exceed any of the weight ratings, yet those that believe they are smart try to rationalize why it’s ok. This whole argument is useless. Towing...
Forum: Tow Vehicles 10-21-2020, 06:10 PM
Replies: 691
Views: 77,864
Posted By Profxd
Stated simply yes so here are some details to...

Stated simply yes so here are some details to consider.
The most important FMVSS 105 braking test here https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/documents/tp-105-03_tag.pdf

SAE j2807 here ...
Forum: Tow Vehicles 10-21-2020, 09:58 AM
Replies: 691
Views: 77,864
Posted By Profxd
A combination of the following in no particular...

A combination of the following in no particular order. No manufacturer has to explain to the consumer why or how they made a determination for a specific weight limit.

1. To meet FMVSS
2. SAE...
Forum: Towing, Tow Vehicles & Hitches 10-19-2020, 12:33 PM
Replies: 42
Views: 6,392
Posted By Profxd
From the manual. ďWhen hooking-up a trailer...

From the manual.
ďWhen hooking-up a trailer using a weight-distributing hitch, always use the following procedure:Ē
And it goes on to instruct consumers to recover 50% FALR. If it works for maximum...
Forum: Towing, Tow Vehicles & Hitches 10-19-2020, 03:32 AM
Replies: 42
Views: 6,392
Posted By Profxd
Correction. In the owners manual Ford says...

Correction. In the owners manual Ford says ďalways useĒ 50% FALR when using a WDH. 50% is not just for maximum rated tongue load.
Forum: Towing, Tow Vehicles & Hitches 10-13-2020, 03:10 AM
Replies: 25
Views: 2,993
Posted By Profxd
And I thought you had plenty of server power to...

And I thought you had plenty of server power to run the ďModelĒ simulation software you use to spit out all those specific numbers you use.
Forum: Hitches, Couplers & Balls 10-11-2020, 12:39 PM
Replies: 140
Views: 28,142
Posted By Profxd
He welcomed comments.

He welcomed comments.
Forum: Hitches, Couplers & Balls 10-11-2020, 10:17 AM
Replies: 140
Views: 28,142
Posted By Profxd
Pictures, scale tickets, what method was used to...

Pictures, scale tickets, what method was used to determine sway damping ratio? calculation, simulation, or real time measurements? Which model? Which simulator? What instruments?
Forum: Hitches, Couplers & Balls 10-02-2020, 03:31 AM
Replies: 183
Views: 25,130
Posted By Profxd
FYI FMVSS requires a vehicle be tested at...

FYI FMVSS requires a vehicle be tested at manufacturers recommended tire pressures at full GVWR and in a lightly loaded condition. Be cautious adjusting tire air pressure based on the tire...
Forum: Hitches, Couplers & Balls 09-27-2020, 09:22 AM
Replies: 183
Views: 25,130
Posted By Profxd
If front axle grip is that severely compromised...

If front axle grip is that severely compromised by the addition of TW alone you have the wrong TV. Stability control of the combination happens at the rear tires, the front is secondary. The WDH only...
Forum: Hitches, Couplers & Balls 09-27-2020, 08:12 AM
Replies: 183
Views: 25,130
Posted By Profxd
Front(lower)to rear(higher) pressure differential...

Front(lower)to rear(higher) pressure differential controls how the TV handles. An example is that 1/2 tons almost always have the same air pressure recommended for both front and rear while 3/4 tons...
Forum: Hitches, Couplers & Balls 09-23-2020, 03:22 AM
Replies: 43
Views: 5,112
Posted By Profxd
Robert, the full weight of the trailer tongue and...

Robert, the full weight of the trailer tongue and the weight of the WDH count as payload on the TV. Is that too complicated for you? Thereís nothing convoluted about it and those that know the...
Forum: Hitches, Couplers & Balls 09-22-2020, 03:20 AM
Replies: 43
Views: 5,112
Posted By Profxd
“For the tow vehicle, payload while towing gets a...

“For the tow vehicle, payload while towing gets a little convoluted which is why many of us suggest using axle limits, towing limit, and gross combined limit for the tow vehicle. The payload number...
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