Tongue weight limits and wdh

valhalla360 wrote:


I understand perfectly what you are saying.

So when the WDH is connected and fully engaged...Does the frame and suspension of your truck see:

- The receiver load (and associated moment arm).

or

- The theoretical trailer hitch load that would be present with the WDH portion of the hitch disengaged.

Not sure you do understand. The weight of the trailer hitch is somewhat irrelevant. The 2 frames (vehicle and trailer) see bending stresses placed on them by the spring bars, however much is placed on them. The net effect is the rear suspension on the vehicle sees less weight on it than a conventional setup.

ktmrfs wrote:
It reduces the reciever LOAD. It doesn't alter the trailer tongue weight.

READ and TRY to understand the mechanics involved! It's a pretty simple statics problem.

I understand perfectly what you are saying.

So when the WDH is connected and fully engaged...Does the frame and suspension of your truck see:

- The receiver load (and associated moment arm).

or

- The theoretical trailer hitch load that would be present with the WDH portion of the hitch disengaged.

valhalla360 wrote:


Funny...the very first post in the diagram is a statement "TV Receiver Load WDH Removes 300lb"

:R

valhalla360 wrote:

ktmrfs wrote:

Huntindog wrote:
If you really want to "know" how it works. click on this link.
Or you can find it in the towing forum.
It has been a sticky there for years.


Ron Gratz explains WD

yes, great reference and a good summary of a force analysis one would learn in a statics 101 ME class.

Funny...the very first post in the diagram is a statement "TV Receiver Load WDH Removes 300lb"

It reduces the reciever LOAD. It doesn't alter the trailer tongue weight.

READ and TRY to understand the mechanics involved! It's a pretty simple statics problem.

ktmrfs wrote:

Huntindog wrote:
If you really want to "know" how it works. click on this link.
Or you can find it in the towing forum.
It has been a sticky there for years.


Ron Gratz explains WD

yes, great reference and a good summary of a force analysis one would learn in a statics 101 ME class.

Funny...the very first post in the diagram is a statement "TV Receiver Load WDH Removes 300lb"

Huntindog wrote:
If you really want to "know" how it works. click on this link.
Or you can find it in the towing forum.
It has been a sticky there for years.


Ron Gratz explains WD

yes, great reference and a good summary of a force analysis one would learn in a statics 101 ME class.

Also, thanks all for helping me realize I haven't completely forgotten all my highschool and college physics and statics and dynamics learnins....

Huntindog wrote:
Try to imagine a tiny scale that would fit between the top of the ball and the coupler. What it would measure is the actual TW.... And that scale would read the same no matter what is done with WD.

You can put yourself in the "I don't understand" category, as well as the
"I don't read so well" category, since you quoted Ron Gratz, whoever that is, and his thread on here.
I looked at it for about 45seconds and he understands and halfway down the first page, he says this...
"No, the load on the BALL actually INCREASES by the assumed 1700#. The load on the receiver DECREASES by 300# as explained above."

Take a number, back of the line, try again when it's your turn...

Edit, in your tiny scale example, it would not be a measurement of tongue weight, it would be a measurement of the force that the coupler is applying to the hitch ball. A component of which is the remaining effective tongue weight after distribution and another component of which is the force applied to the connection (irrespective of tongue weight, actually).

ktmrfs wrote:


the force the reciever places on the axles change, the force on the axles changes all due to the force from the WD hitch the actual WEIGHT of the trailer tongue does NOT change.

You're correct, anything besides this is wrong... but it is fun to watch people who think they know what they're talking about!