You got that right.
Umm, yea keep your 59mpg... I'd like to live not die. Turning off the engine and going around a 25mph turn at 50... Ok no power steering, no power brakes. Sounds like a wreck waiting to happen to me.which is what happens when you take a 25 mph turn going 50. Cathy, Terry's wife, who is sitting next to me in the backseat, grabs my leg. I grab the door handle. As we come out of the 270-degree turn, Cathy says, "I hope you have upholstery cleaner."
Yup, Do the same in my cage.. Wish these kids tryin to race me, would understand how much saving gas means to me now-a-days..Fuck hypermilling, I can get decent mpg on my bike riding around like an asshole, so thats just what I'll do.
BTW, drafting behind tanker trucks is the best. The draft they leave is not turbulent and decently long, you can almost pull the clutch in and coast behind them forever.
Sure enough.Thats impossible.
One gallon of e85 ethanol contains 76,000 btus. Convert this number into horsepower hours and you get about 30 horsepower hours. Lets say the guy is going 50 miles per hour, it would take him 2 hours of driving to get 100 miles, and this engine would be limited to using the equivalent of 15 horsepower average this entire distance, and this is NOT taking into account the thermodynamic efficiency of an internal combustion engine, or the rolling and aerodynamic efficiency of his POS mustang. With these taken into account, he would have to be running his car at 50 mph on the equivalent of 5 or so horsepower.
Gasoline is approximately 125,000 btus per gallon, converted into horsepower hours it is about 50. With a gasoline engine operating at an extremely high 40% thermodynamic efficiency, we get closer to 20 horsepower hours. A stock 5.0 mustang can get about 20mpg, so on this same 2 hour, 100 mile trip, it is more believable that the car uses about 100 horsepower hours (or 5 gallons of [email protected]% efficiency) giving the car an average power usage of 50 horsepower.
I don't believe for 1 second that you can get a 5.0 mustang to get 100mpg on anything other than snake oil.
To get 100mpg on any car, you would have to vastly improve the aerodynamics and the mechanical and rolling resistance before you should even think about improving the engine. This means hard skinny tires, a ridiculously slippery shape, a tiny frontal area, fewer moving parts, and less weight.
I got about 8.5 hp, is your math right?Sure enough.
Force of drag = 1/2p * v^2 * Cd * A / 29.91
p=fluid density (0.076 pounds per cubic foot is typical for air)
v=velocity relative to the fluid (MPH)
Cd=Coefficient of drag (~0.28 for a Corvette)
A=Frontal area (~21.3 sq. feet for a Corvette)
29.91=Constant to take common American measurement units into account (feet, pounds, MPH)
Even in a slippery Corvette, you suffer at 60 MPH from 27.277 pounds of aerodynamic drag.
Force [lbf] = 0.5 * 0.076 * 60^2 * 0.28 * 21.3 / 29.91
Force = 0.5 * 0.076 * 3600 * 0.28 * 21.3 / 29.91
Force = 27.277
Converted to HP at the engine, we'll assume a 1 foot radius at the rear tires, a 20% loss in the drivetrain, a 0.5:1 ratio in the transmission, and a 3.42:1 ratio in the rear end. The result? A requirement of 20 pounds of force at the crank. If the RPMs are at 1,500, that's a horsepower requirement of 5.7 HP.