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Golf ball dimples on the hull bottom?


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OK, so now Mythbusters is the go to authority on aero- and hydrodynamics? I think I'll trust people with actual degrees in the subject.

The problem is that water is far more "sticky" on a molecular level than air. It's also far more dense, and, well, it's just different as you can certainly tell. Therefore, it is false to assume the same things that work in air will work in water, even though they are both fluids.

Interesting

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Zack, they put the dimples in the clay that was already on the car .

How about we install air injectors [ Small air compressor ] in our hull so it's riding on a air cushion .

That's been done... ONR has at one point or another tried it all.

What does hold promise is the eventual development of a material that will mimic the properties of a dolphins skin (Yes, it's being worked on by the Government).

On a really fair bottom (think Americas Cup fair) an 800 to 1200 grit surface with Rain-Ex has some benefit. The downside... You would have to apply the Rain-Ex daily.

Jon

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On a hull you want to have protrusion instead of intrusion meaning outward dimples over inward this will break the suction instead of inducing it. Jon mentioned dolphin skin, but Mako shark skin is a better example because it is irregular. One thing to remember the fastest fishes have the smallest scales. This translates into more smaller irregularities are much better than less larger ones.

In the Bejing olympics alot of airtime was spent on the shark skin bathing suits that were worn, duplicating that in glass would be hard. Aluminum on the other hand is a can do substance. The two methods I've looked into are knurling like you learned in the metals shop of high school. Very labor intensive. and checkering like a gunstock again very labor intensive. Will it work yes is it worth the effort don't know.

Water creates 52 times more drag than air. as far as the dimpling of a golf ball and it's areodynamic enhancement ability. 2case I have personally worked on

1 was a set of bow tie aluminum heads the other was a crower small block chevy crank. The heads produced 9% better airflow up to .550 lift and 7% better over .650 lift under 28hg of vacume.

The crankshaft had no way of testing but it looked cool.

Lexus has put a panel under the car that is dimpled it has increased fuel mileage as well as reduced the interior noise level in that model

SRP has produce a piston with ridges with dimples that creates a cleaner more complete burn that the same compression ratio smooth piston That translates into more air velocity during the squish. Making the mixture better for combustion

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