TrailManor Owner's Forum  

Go Back   TrailManor Owner's Forum > TrailManor Technical Discussions > Towing and Hitching
Register FAQ Members List Calendar Mark Forums Read

Reply
 
Thread Tools Display Modes
Old 09-07-2020, 12:57 PM   #1
CamperBink
Member
 
CamperBink's Avatar
 
Join Date: Jul 2020
Location: MN
Posts: 5
Default Tongue weight 2922 KS

The specs list 434 - ish lbs tongue weight. This is a bit higher than I would like for the unloaded app 3400 lb dry weight. Does that tongue weight perhaps include the propane tanks? Have any of you with the 2922 KS checked actual tongue weight, loaded or unloaded? Thx.
__________________
Minnesota-Arizona 2922 KS
CamperBink is offline   Reply With Quote
Old 09-07-2020, 01:36 PM   #2
Bill
Site Team
 
Bill's Avatar
 
Join Date: Feb 2003
Location: The mountains of Scottsdale, AZ, and the beaches of Maine
Posts: 10,088
Default

I'm not sure exactly where you are going with this, and I'm not sure where your 3400 pound dry weight came from - I see 3130 pounds dry. Using the specs on the TM site, I'm finding the following.

RVers have always been taught that the tongue weight of a trailer must be at least 10% of the towed weight. TMers have always been taught that TMs have a higher tongue weight because the TM axle is farther back than it is on most trailers, to make the trailer sway-proof. And TMs do indeed seem to be sway-proof. The price of moving the axle back, of course, is increased tongue weight, and for TMs, the number has been 14% (there is no spec on this, but it is what I, and others, were told at the TM factory years ago). The spec sheet for the 2922 shows that the dry weight - not same as unloaded weight! - is 3130 pounds, and the tongue weight is 434. A few taps on the calculator shows that 434 is 14% of 3130. So the specified tongue weight applies to the specified dry weight - not the loaded weight.

So now what happens when you start loading up the trailer? The spec sheet shows that the Load Capacity is 1350 pounds. So if you load it to the max, the gross towed weight is 4480 pounds. And 14% of 4480 is 627 pounds, which is a whopper of a tongue weight. To keep to a 500 pound tongue weight, you have to keep the loaded weight to about 3600, since 14% of 3600 is 500 pounds. That gives you about 3600-3130 = 470 pounds above dry weight to work with, and much of that is taken up with things like the air conditioner and the awning. I admit that I'm having trouble with this answer, so you might want to confirm it with the factory. They don't have everything quite up to speed yet, and perhaps they use a slightly different definition of "dry weight". But the numbers do seem to be in line with my knowledge of the 2720 series.

I'm not a degreed mechanical engineer - my degrees are elsewhere. I would love to have someone show me a different answer. But this is where I end up. I'm not sure exactly where you are going with this, and I'm not sure where your 3400 pound dry weight came from. But I think (someone please correct me if I am wrong) that the term "dry weight" includes the propane tanks themselves, since they are not options, but does not include the propane in those tanks.

Bill
__________________
2020 2720QS (aka 2720SL)
2014 Ford F-150 4WD 5.0L
Bill's Tech Stuff album
Bill is offline   Reply With Quote
Old 09-07-2020, 06:10 PM   #3
oldstick
TrailManor Master
 
Join Date: Mar 2014
Location: GA
Posts: 504
Default

I would tend to agree with Bill. On average the tongue weights for a single axle TM tend to be higher than 10% of the trailer weight due to the rearward location of the axle. So determine the actual weight of the loaded trailer, with any extra options like AC, awning, full propane tanks, full water tanks, extra cargo etc. It would not be that surprising to me if the tongue weight pushed 500 or more. As Bill said, sway should not be a problem but you still need a truck/SUV rated for that much tongue weight. Otherwise you are into the realm where a load leveling hitch is mandatory.
oldstick is offline   Reply With Quote
Old 09-08-2020, 05:30 PM   #4
CamperBink
Member
 
CamperBink's Avatar
 
Join Date: Jul 2020
Location: MN
Posts: 5
Default

Thanks - I was wondering what was included in that tongue weight. Propane tanks, then, but not fuel, obviously. I assume the optional tongue jack is not included. I plan to actually measure as soon as I am able, but was wondering whether I will need to remove a tank or make some other change to be sure it stays under 500 lbs. Very helpful. Thanks.
__________________
Minnesota-Arizona 2922 KS
CamperBink is offline   Reply With Quote
Old 09-21-2020, 12:55 AM   #5
CA2619
Site Sponsor
 
Join Date: Sep 2020
Location: Southern California
Posts: 10
Default

The actual trailer weight with options should be on the sticker inside the kitchen cabinet door. This sticker will also list the GVWR for the trailer and break down the carrying capacity with full water and propane weights. The storage in the rear of the 2922 will affect the tongue weight making it lighter. There is a trailer weight distribution calculator on engineersedge.com that is very interesting.
CA2619 is offline   Reply With Quote
Old 10-19-2020, 09:13 AM   #6
lisasTM
Member
 
Join Date: Oct 2020
Posts: 6
Question propane tanks amplyify tongue weight ?

We are borrowing a friends trailmanor and planning to tow with 2019 Highlander XLE. We have installed Redarc brake controller and tough tow WDH. BUT, we are still a bit worried about damaging new Highlander by towing TrailManor with too much tongue weight.
We decided to measure the tongue weight using the methods suggested at Curt. https://www.curtmfg.com/trailer-part...ers/learn-more

First set of measurements using scale at local dump:
highlander w/o trailmanor attached 4940 lbs (2 highlander axles on scale)
highlander WITH trailmanor attached 5500 lbs (2 highlander axles on scale)
----------------------------------------------------------------
tongue weight 5500 - 4940 = 560 lbs

Then we removed 2 propane tanks (30lbs x 2 = 60lbs)
from the tip of the tongue and repeated measurement at local dump
highlander WITH trailmanor attached 5380 lbs (2 highlander axles on scale)
---------------------------------------------------------------------------------
new tongue weight is 5360 - 4040 = 440 lbs.

QUESTION IS: how is it possible to remove 60lbs and change tongue weight by 120 lbs = 560-440 ??

we also did the other method that CURT suggests with a bathroom scale and got pretty much the same result ??

Can anyone explain why ?? What the heck ?

total rig weight including us was 8460 on dump scale
TM only was 3520 on dump scale loaded with water, propane tanks, battery and spare tire
lisasTM is offline   Reply With Quote
Old 10-19-2020, 09:30 AM   #7
Larryjb
Site Sponsor
 
Join Date: Nov 2016
Location: Vancouver BC
Posts: 1,518
Default

I thought I had replied to this question already, but here's my answer again...

The 30 lb on the tank is for the tank only. A full 30 lb tank should weight in about 55 lbs. For 2 full 30 lb tanks, this comes to 110 lbs, pretty close to the 120 lbs you are trying to account for.
__________________
Larry

2002 Tahoe
2008 4.6 Explorer
2001 2720SD

Various TM images that you may or may not find elsewhere:
http://www.trailmanorowners.com/forum/album.php?u=11700
Larryjb is offline   Reply With Quote
Old 10-20-2020, 01:26 PM   #8
lisasTM
Member
 
Join Date: Oct 2020
Posts: 6
Default

thanks, we'll check ...husband said he measured 30 lbs for each propane tank on bathroom scale.
lisasTM is offline   Reply With Quote
Reply

Tags
2922, tongue weight


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ford Flex w/ Tow package, a 3023 and 575 # tongue weight Sauropod Towing and Hitching 14 03-02-2014 08:16 PM
2922 KD Tongue Weight MarkoPolo Towing and Hitching 8 07-07-2013 05:31 PM
Tongue weight of 2619 KParis Prospective Owner Questions 4 08-10-2010 05:57 PM
Understanding RV Weight Terms Bill TrailManor Technical Library 0 01-12-2010 02:30 PM
Tongue Weight of 02 TM2619 fcatwo General TrailManor Topics 2 03-25-2005 07:55 AM


All times are GMT -6. The time now is 05:40 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 2022 Trailmanor Owners Page.