Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
Jayco RV Owners Forum
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-23-2023, 10:48 AM   #1
Senior Member
 
Join Date: Nov 2016
Location: San Antonio
Posts: 2,924
Safe Comfortable Towing: Frontal Area Versus Weight

As we've discussed before with TT we are pulling a sail behind us. If that is a big part of the equation, than given the same frontal area, will there be a big difference between a 4,000 and 5,500 pound TT? If it was truly just the weight then the difference would be bigger than if weight is a secondary factor.

In my case my tow rating is 12,000 so I'm comfortably under the specifications in either case.
TaftCoach is offline   Reply With Quote
Old 12-23-2023, 11:04 AM   #2
Senior Member
 
craigav's Avatar
 
Join Date: Mar 2017
Location: North Texas
Posts: 3,562
While there are mathematical equations that can help determine the drag coefficient (most often used in the design of aircraft) it is hard for any RV'r to know what the effect of the frontal area wind drag is. I will add though that what I believe Truck manufactures consider over other aspects is primarily the weight of the trailer and the truck's ability to handle that amount of weight both in starting and stopping. If one could remove the wind drag and the drag of the tires/axles then keeping a very heavy trailer moving would take very little energy. ~CA
__________________
2010 GreyHawk 31SS
craigav is offline   Reply With Quote
Old 12-23-2023, 12:04 PM   #3
Senior Member
 
Grumpy's Avatar
 
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 16,066
Quote:
Originally Posted by craigav View Post
If one could remove the wind drag and the drag of the tires/axles then keeping a very heavy trailer moving would take very little energy. ~CA
Yep. That's why speed also plays a major factor in fuel economy. Wind resistance has a steeper curve between 70 & 80 than between 50 & 60.
Grumpy is online now   Reply With Quote
Old 12-23-2023, 03:15 PM   #4
Senior Member
 
Join Date: Oct 2022
Location: Central
Posts: 195
When I towed my TT, the fuel economy wasn't that much different than when I towed my enclosed utility trailer. Their frontal areas were similar, both larger area than my truck. The weight of my TT was at least double that of my enclosed trailer.

With my class C RV, I didn't see any difference between flat towing my Jeep Wrangler or my enclosed trailer. Both have a frontal area less then my class C.
LukeDagny is offline   Reply With Quote
Old 12-24-2023, 03:42 PM   #5
Senior Member
 
Join Date: Oct 2023
Location: Columbus
Posts: 128
frontal area is primarily just a concern for aerodynamic drag. The faster you go, the more the sail matters. It doesn't really affect stability (as much as other factors), braking, or dynamics.

That far under the limit, weight is almost the least concern for towing once you're up to speed (where frontal area matters) but it does play into almost everything else. Braking most obviously, stability (especially the distribution), etc. Assuming a safe distribution for both, you'd be hard pressed to tell that difference in weights other than one accelerates slightly worse than the other.

With campers though, the weight is probably a result of a larger/longer trailer which may affect the stability and dynamics to feel heavier.
__________________
-Russell
"You don't get to judge me for how I fix what you break."
2018 Eagle HT 28.5 RSTS/2004 Chevy 2500HD 6.0 MANUAL
Russc25 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Jayco, Inc. or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 09:42 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.