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Search: Posts Made By: Sport_Pilot
Showing results 1 to 22 of 22
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Forum: Aerodynamics
02-02-2010, 04:08 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

You forgot the accessories, the power for the water pump, altenator, air pumps, etc. I had to account for that and more when I took my PE test many years ago.
Forum: Aerodynamics
02-02-2010, 01:56 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

And you can have torque without movement. which nobody wants for a plane.
Forum: Aerodynamics
02-02-2010, 01:54 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

I think he came up with the another unit of power you mentioned, the Watt.
Forum: Aerodynamics
02-01-2010, 01:19 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

Unless this was a small dog, he should have been able to pass the golf balls. So why open him up?
Forum: Aerodynamics
01-25-2010, 08:47 AM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

The big open space in wheel pants is clearance to prevent dirt and mud from jamming the wheel.
Forum: Aerodynamics
01-11-2010, 08:19 AM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

Actually it was 12% at one speed at a constant rate. The millage from acceleration and climbing uphill would be the same, so there would be much less than a 12% improvement on epa millage.
Forum: Aerodynamics
12-10-2009, 01:08 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

The mythbusters car was a later model Ford Taurus 2001 or so. the one with the blunt rear as opposed to the sharper smother rear of the earlier models. They put a layer of clay on it, tested the...
Forum: Aerodynamics
10-28-2009, 07:11 AM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

Maybe if you point the tail to the rear, and it is made to fall off when it hits the ground?
Forum: Aerodynamics
10-28-2009, 07:10 AM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

I couldn't find anything. Except that dimples on a Russian sub, put there for a special missle, caused it to be easier to track by sonar.
Forum: Aerodynamics
10-27-2009, 02:47 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

When it came out many people hated the car. It was geared for race at Daytona and did not accelerate well, and not many people wanted to go 200MPH on the interstate!
Forum: Aerodynamics
10-27-2009, 02:45 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

I gather the vinyl was holding the steel foil roof together?
Forum: Aerodynamics
10-27-2009, 02:44 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

Not very definitive. One car, with wackey people, doing a show for entertainment. They get almost as much wrong as right.
Forum: Aerodynamics
10-27-2009, 11:52 AM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

The dimples also contribute to the magnus effect. Baseballs were produced for a while without stitching, but taken off the market because they would not curve or sink, or at least not as much.
Forum: Aerodynamics
10-27-2009, 10:05 AM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

By numbers I mean actual measured values. There are a lot of numbers made up by proffessors used simply as examples, or test problems, then picked up as fact, when it never was fact.
Forum: Aerodynamics
10-27-2009, 08:19 AM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

And how much less if spinning foward from the top, and how much more if spinning foward from the bottom.

Surely there are some imperical measurements out there. It would be a good college...
Forum: Aerodynamics
10-27-2009, 07:57 AM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

I have seen balls hit downward from a small clif gain altitude. If you top the ball the foward spin will push the ball down. I have seen these hit with the edge of the club, go up and quickly go...
Forum: Aerodynamics
10-26-2009, 11:54 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

I wasn't upset or offended. Not sure you meant to respond to my post. Having seen golf balls arc up from the back spin, I have a hard time believing the drag is more important than the lift. Any...
Forum: Aerodynamics
10-26-2009, 03:49 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

Now that you have read a few web pages on this. Tell me how much the drag is, how much that slows the ball down, and how much lift is created from the spinning ball.
Forum: Aerodynamics
10-26-2009, 03:25 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

Sorry it was a dupe.
Forum: Aerodynamics
10-26-2009, 03:22 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

I may be wrong, but I believe that the way most clubs are angled to the back to hit the ball up in the air creates backspin, thus producing lift. I know people have measured the drag of the ball and...
Forum: Aerodynamics
10-26-2009, 01:04 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

They probably forgot to account for something that changed the fuel flow readings. Temperature, humidity, pressure, or strange vapors emitting from the clay.
Forum: Aerodynamics
10-26-2009, 12:40 PM
Replies: 229
Views: 28,125
Posted By Sport_Pilot

RE: Golf ball dimples

Golf balls are dimpled simply to keep them from rolling off gently sloped greens. However they do make the ball travel further. But because of increased lift not reduced drag. The mythbustes...
Showing results 1 to 22 of 22


 
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