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Search: Posts Made By: hugger-4641
Showing results 1 to 25 of 28
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Forum: Aerodynamics
01-25-2010, 07:28 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

In the full scale world they serve several purposes, one of which is improved aerodynamics and fuel effeciency. In the model world, it probably depends on the model and what it is used for, but for...
Forum: Aerodynamics
12-10-2009, 11:25 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Not that I agree with a all of the Mythbuster's methods or results, but in this case, if I am not mistaken, they used the same exact car for each test. Not three different cars of the same model. If...
Forum: Aerodynamics
11-10-2009, 07:25 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Exactly what I said in a prior post. Are we the only ones who've picked up on that.??:eek:
Forum: Aerodynamics
11-10-2009, 12:01 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

I never heard of that one, I'd like to see that plane with the holes in the wings!;)
Forum: Aerodynamics
11-09-2009, 08:32 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

I guess everything is subjective after you have a couple or twelve "time outs" then huh? :D
Forum: Aerodynamics
11-09-2009, 06:40 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

A properly designed airfoil"
According to what criteria?
All of the shapes are compromises
every last one of em
As weight us reduced or the power is increased ,the criteria for the
...
Forum: Aerodynamics
11-09-2009, 09:05 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Your light hearted attempt to dodge the point still supports it ;) If you don't include the F-14 engines, then you will will not get enough speed thus not enough "lift". Therefore, as you alluded in...
Forum: Aerodynamics
11-09-2009, 08:51 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Sorry, but no I do not have any pics. If I did, the Navy would soon have me in one of those concrete rooms with bars on one wall.:eek: However, I am trying to nail down a graphic from an old Popular...
Forum: Aerodynamics
11-06-2009, 09:14 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Hypothethical case in point, try to put the wing from an F-14 on a Cessna Citation and see if generates enough lift to fly.;)
Forum: Aerodynamics
11-06-2009, 09:08 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Who ever told you that didn't complete the sentence. You can create lift with almost any object if you have enough velocity of air moving over it. However, you must have "THE PROPER AIR FOIL" to...
Forum: Aerodynamics
11-06-2009, 08:50 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Good example, but again I must point out that this "drag" that propels the balloon is caused by wind moving past the balloon at a speed faster than the balloon itself is moving. Thus the relationship...
Forum: Aerodynamics
11-06-2009, 08:21 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Concerning the "low pressure" or "wake" area, you are partially correct. When the wing is at low AOA and in forward motion, lift is created along the top surface due to "Bernoulli's" law, but this is...
Forum: Aerodynamics
11-06-2009, 05:35 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Since we're in the mood to haggle, let me try another explaination. If you could magically remove drag and gravity from a plane in motion, lift would constantly pull the plane in a loop, but would do...
Forum: Aerodynamics
11-06-2009, 05:23 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

In that case you have changed the pattern of air flow over the wing. As this happens lift is lost and the underside of the wing is actually now a very large leading edge, and yes, drag may be created...
Forum: Aerodynamics
11-06-2009, 02:58 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Exactly what I meant but worded much better than I did.;)
Forum: Aerodynamics
11-06-2009, 02:44 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

If that makes it easier for you, stick with it. I do the same with batteries, Nicad and Nimh, are all "Nicads" to me when I am including Lipo's in the discussion. But I wouldn't argue with someone...
Forum: Aerodynamics
10-30-2009, 07:21 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Lift and drag are infinite in direction, either one can cause the motion of an object or oppose motion in any direction


[i]

The first statement could be interpreted as contridictory to...
Forum: Aerodynamics
10-28-2009, 05:53 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

http://wings.avkids.com/Book/Sports/instructor/golf-01.html

I think Pbs67 posted this link. It seems to support what I said about the golf ball. The travel distance/velocity is increased from...
Forum: Aerodynamics
10-27-2009, 02:57 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

A lot of people still hate the look of it! But anything with a 426 hemi has my attention!:D
Forum: Aerodynamics
10-27-2009, 02:04 PM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Didn't remember the vinyl top, but the rear fin and nose piece that followed on the Super Bird was an aerodynamic attempt that was right on track, but a little ahead of its time! Sure was odd...
Forum: Aerodynamics
10-27-2009, 11:39 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

I tend to agree on this, but it would be neat to have some data to support the opinion. Somebody send this to Myth Busters!!!;)
Forum: Aerodynamics
10-27-2009, 11:03 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Yes, I think we all agree on that, the question is which force contributes the most, "lift" from the spinning (magnus effect), or reduced loss of velocity due simply to reduced drag from the dimples?
Forum: Aerodynamics
10-27-2009, 08:18 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

After this I guess the next question would be:

If you could a hit another smooth ball and a dimpled ball with all variables equal but with a perfect back spin, which would go farther?

Then...
Forum: Aerodynamics
10-27-2009, 08:09 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

I've personally experienced the same thing, but I'm still not sure that this force actually carries the ball foward linearly more than the effect of reduced drag and resulting velocity. I guess a...
Forum: Aerodynamics
10-27-2009, 07:44 AM
Replies: 229
Views: 28,126
Posted By hugger-4641

RE: Golf ball dimples

Thanks for the link Darock. It seems it is not cut and dried to call it "lift", but since Wikipedia does, I'll go along with it. I think we all understand the same thing, we're just explaining...
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