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Old 11-04-2012, 01:09 PM   #24 (permalink)
Mustang Dave
Intermediate EcoDriver
 
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Join Date: May 2009
Location: Northern Arizona - It's a DRY cold..
Posts: 671

Trigger - '07 Ford Mustang V6 Premium Coupe
Team Mustang
Sports Cars
90 day: 32.76 mpg (US)

Big Red (retired) - '89 Ford F-250 4wd Custom
90 day: 18.13 mpg (US)

Big Red II - '13 Ford F-150 FX4
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Quote:
Originally Posted by wungun View Post
Exponentially means just that...
And easy way to look at it is, to double your speed requires 4times the power.
So if your increasing your speed from 10mph to 20mph, it'll still require 4 times the power...except at those speeds, you might only be using 3hp to maintain 10mph (or 12hp for 20mph.)
But if you're doing 50mph, and you want to do 100mph, where it might be 50hp to do 50, you'll need 200hp to do 100mph...and exponential jump!

Someone correct me if I'm wrong....
Doubling your speed requires 8 times the power. Drag force is 4X as much at double the speed.
Power is a function of force * velocity.
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Quote:
Originally Posted by thatguitarguy View Post
Just 'cuz you can't do it, don't mean it can't be done...
Quote:
Originally Posted by elhigh View Post
The presence of traffic is the single most complicating factor of hypermiling. I know what I'm going to do, it's contending with whatever the hell all these other people are going to do that makes things hard.
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