The TV series MythBusters recently did an episode where they concluded that dimpling a car like a golf ball makes it more aerodynamic. The reason car manufacturers don't manufacturers cars like a golf ball with aerodynamic dimples is because they don't think it would sell.
What was the result of the car dimple experiment?
To keep the experiment consistent, all 1,082 dimples removed from the clay exterior were put in a box and then set in the back seat so that the car would weigh exactly the same as before dimpling. At constant 65 mph speed, the cleaner car gave 26 MPG and the dimpled one gave an amazing 29 MPG.
What is the independent variable in the dimpled car experiment?
In our car example, the independent variable is the shape of the car's body. The dependent variable — what we measure as the effect of the car's profile — could be speed, gas mileage or a direct measure of the amount of air pressure exerted on the car.
Does adding dimples to a car increase its gas mileage Mythbusters?
Yes. Apparently, covering your car in clay and dimpling it like a golf ball will result in a significant increase in gas mileage.
Does adding dimples to a car?
The theory is that, like a golf ball, the dimples would reduce the car's drag through the air, thus allowing it to travel the same distance at the same speed using less fuel. The result? Over 29 mpg.
29 related questions foundWhy do dimples reduce drag?
First, dimples allow air to flow more smoothly around a ball's surface, which decreases the wake and low-pressure area behind the ball, resulting in less drag. Second, the dimples increase lift by causing the air to move faster at the top of the ball, creating lower pressure there.
How do golf ball dimples reduce drag?
Dimples on a golf ball create a thin turbulent boundary layer of air that clings to the ball's surface. This allows the smoothly flowing air to follow the ball's surface a little farther around the back side of the ball, thereby decreasing the size of the wake.
Why are cars not dimpled like golf balls?
The dimples in a golf ball promote an earlier transition to turbulent flow and thus reduce the pressure drag of the golf ball, so it can fly further. In a car, the size is large enough to develop a turbulent boundary layer early on. Dimples would not help, but increase drag slightly.
How many pips are on a golf ball?
Most often, the number of dimples per golf ball falls between 300 and 500.
Is high gas mileage good or bad?
Gas mileage is determined by the number of miles a vehicle can go on one gallon of gas. Hence the term “miles per gallon (mpg).” The higher the mpg rating, the better or more efficient a car is, and the lower the mpg rating, the worse it is.
What is the controlled variable in car?
Dependent variable: the time it takes for the car to go down the slope. Controlled variable: the height of the slope, the car, the unit of time e.g. minutes and the length of the slope.
Which was varied by the experimenter?
Independent Variable - An independent variable is a factor that is intentionally varied by the experimenter in order to see if it affects the dependent variable.
Do clean cars get better gas mileage?
While it might seem weird that a clean car can achieve better fuel economy, it's not. In fact, it really comes down to aerodynamics. The protruding dirt and debris on your car create a rougher surface for the outside air to flow around.
Is it worth running in the rain MythBusters?
But is it better to walk or run in the rain? The pair simulated a rain storm and discovered that walking was better. However, when they revisited the experiment in real rain they found out that it was better to run.
Does waxing a car increase gas mileage?
When it comes to aerodynamics, a waxed or clean car will allow air to move freely across the surface (less resistance). Unlike a clean surface, a dirty car limits the amount of airflow, causing increased friction and less MPG. Unfortunately, we didn't coin this finding, but the experts at MythBusters did it for us.
What are the small indentations on a golf ball called?
Golf balls can have dimples that are deep, shallow, large or small. Some golf balls have different sizes of dimples on the same ball. Dimples come in all different shapes, including circles, ovals, teardrops and even hexagons like a soccer ball.
Why is Bubba Watson's driver pink?
The driver is part of a year-long campaign sponsored by Ping. Every time Bubba drives the ball over 300 yards, Ping will donate $300 dollars to his charity.
What are the dots on a golf ball called?
This is called the Magnus effect. The dimples on a golf ball deform the air around the ball quickly causing a turbulent airflow that results in more Magnus lift than a smooth ball would experience.
What is the effect of dimples?
The dimples act as artificial turbulators, creating turbulence next to the ball surface and creating two layers of air going around the ball. The top layer is going faster than the bottom layer, i.e., air clings to the ball's surface, which creates turbulence.
Do dimples reduce skin friction?
In effect it's a positive trade-off: "The ball pays a skin friction penalty, but gains a pressure drag advantage," Maughmer says. The difference is huge in terms of the distance a golf ball can be driven, he adds. Dimpled balls can travel nearly twice as far as smooth ones.
How many dimples does a Pro V1 have?
Generally speaking, you will find anywhere from 300 to 500 dimples on golf balls. For instance, Titleist Pro V1x features 328 dimples. As for its predecessor Pro V1 (how many dimples are on a Titleist Pro V1 golf ball), it has 352 dimples.
How many dimples are on a regulation ball?
On American golf balls, there are usually 336 dimples, while there are 330 on a British ball. However these numbers can vary widely. Golf balls have anywhere from 300-500 dimples.
What golf ball has the most dimples?
The golf ball with the most dimples is the Dimple 1070. This golf ball has 1,070 dimples. However, these balls can not be used in any competitions as they are not regulation-grade balls. The regulation golf ball with the most dimples is the Mizuno RB 566, with 566 dimples.
