2017 F-450 Super Ike Gaunlet

jims1 wrote:
I would like to see a 5th wheel at 20000lbs behind it. Something with 60-70sqft of frontal area. Not knocking it, but test it for the RV user.

The truck alone is 50-70 depending upon how out fitted. A BIG 5w with a bedroom slide is typically in the 110-120 total sw ft of frontal area. My old TT was 90! One could notice it vs when i pulled a 9500 lbs bobcat behind it. It took more HP to move the 15K gcw TT than the 18K equipment trailer setup by 20-25HP. But 50HP to hold 60 up ea 1% grade vs 45 with the TT. So after about 3%, i was faster with the tt than the equipment trailer. I also got better mileage with the ET than the TT by about 1mpg. I made a trip across the state of washington with the eT and my small trackhoe. 15K same as TT, made 2 mpg better, pulled most of the grade a gear taller, and 7-10 mph faster.
Frontal area does make a difference in how well one will pull.

Marty