F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

RoyJ wrote:

4x4ord wrote:
If it can average 42 mph it would reach the top of the hill in 10 minutes 50 seconds.
According to the drag formula it would require 89 HP tp overcome drag and rolling resistance at 42 mph.

320 minus 89 leaves 231 HP which is the required HP to raise the 39000 lbs 2120 feet in 6 minutes and 50 seconds.

Edit: I guess I should have quoted the definition of HP:
1 horsepower is the power required to raise 550 lbs 1 ft in 1 second

So 39000 lbs x 2120 ft / (620 seconds x 550) is 242.46 HP

I think I spot the error now - when I crunch the following:


39000x2120/550/231hp

I get 650 seconds, not 6:50s. 650 seconds translates to 10:50s, which is a more reasonable time for the Ram.

If the Ram did do it in 6:50s, then its average speed would be significantly higher, and we'd have to start the iterative process all over again...

It takes a whole sack of flour to make a big biscuit.