Mythbusters.
Clean = 26.4 mpg
Dirty = 24 mpg
Clean = 26.4 mpg
Dirty = 24 mpg
Clean car gets +10% mpg
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I don't buy that...
Just how dirty was the dirty car? Was there a scale model of Devils Peak on the roof?
I never would have guessed this to be true.
I never would have guessed this to be true.
Originally Posted By: rick9009
golf ball dimpled car got 29 mpg
Now that DOES make sense.....Too bad they cant make us like the way it would look.
golf ball dimpled car got 29 mpg
Now that DOES make sense.....Too bad they cant make us like the way it would look.
Originally Posted By: BuickGN
Just finished watching that myself. The clean one is believable though I didn't expect that large of a difference. The dimpled golfball one surprised me and them.
You cant hit a completely smooth golf ball more than 150 yards. It just stalls in the air and dies.
The dimples cut down on the adhesion the air has on the ball and allows it to "slip" through the air cleaner.
A smooth golf ball is much easier to hit straight though, it has very little spin. It's a give and take relationship.
Just finished watching that myself. The clean one is believable though I didn't expect that large of a difference. The dimpled golfball one surprised me and them.
You cant hit a completely smooth golf ball more than 150 yards. It just stalls in the air and dies.
The dimples cut down on the adhesion the air has on the ball and allows it to "slip" through the air cleaner.
A smooth golf ball is much easier to hit straight though, it has very little spin. It's a give and take relationship.
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Originally Posted By: LS2JSTS
The dimples cut down on the adhesion the air has on the ball and allows it to "slip" through the air cleaner.
It would be more accurate to say that it creates a more turbulent boundary layer which increases friction drag but delays boundary layer separation and thus decreases pressure drag.
The dimples cut down on the adhesion the air has on the ball and allows it to "slip" through the air cleaner.
It would be more accurate to say that it creates a more turbulent boundary layer which increases friction drag but delays boundary layer separation and thus decreases pressure drag.
I thought that even trying to explain was beyond me.....I saw a pro once who demonstrated on the range how big a difference the dimples make.
Maybe you know....something I've always wondered. Is it the spinning that the dimples help create that helps or is it the dimples themselves that break up the air around the ball?
Maybe you know....something I've always wondered. Is it the spinning that the dimples help create that helps or is it the dimples themselves that break up the air around the ball?
Reminds me of why we would wash the jets in the Service. They said it helps with "aerodynamic efficiency",less drag.
I could see a increase on maybe highway speeds, but I have never seen anywhere near that kind of difference. I used to keep pretty good records of my gas milage and it didn't seem to matter much whether it was clean or dirty. If it was mud bogging dirty I'd say more of it had to do with weight.
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Some Mythbusters stuff is just silly. Some is decent, but they do need the entertainment factor.
The one where they tried to disprove a car being blown off the road when a plow came by was just dumb. They could have simply measured the pressure on a like cross section'd sheet and said it was enough or not enough to do the job.
The one where they tried to disprove a car being blown off the road when a plow came by was just dumb. They could have simply measured the pressure on a like cross section'd sheet and said it was enough or not enough to do the job.
I like the one that they did with the mileage of a Pick-Up truck and it's bed.
That was cool.
That was cool.
I've never noticed better MPG but, the car sure does ride better!
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