Does this speed sound right?

[wvit100]

Re: Does this speed sound right?

Turbulent layer <br /><br /><br />Joaquim Peiro, of the aeronautics department at Imperial College London, says that the new design should, in principle, improve the flight of the golf ball.<br /><br />"With a hexagonal arrangement you can cover more of the ball than with dimples," Peiro says. "Probably you can affect a wider area of the flow past the ball."<br /><br />Dimples create a turbulent boundary layer as air flows past a golf ball. This allows air to "hug" the surface further round the ball as it passes, reducing the size of its wake and, consequently, its drag. For this reason a ball with dimples of the right depth is more aerodynamic than a smooth ball.<br /> http://www.newscientist.com/news/news.jsp?id=ns99991746

 

[wvit100]

Re: Does this speed sound right?

There are several products out there that attempt to break the bond between the water and the hull, roughing the hull up in the pad area, the area that touches the water at plane, with some fine sandpaper also works.<br /><br /><br />Racers have known that hydrophobic coatings can actually produce greater drag in spite of their smoothness. <br /><br />Products containing silicone and wax are not usually effective in marine drag reduction. Sea-Slide can boost your boat's performance. Because this durable drag reducing overcoat traps a thin layer of water next to your hull's surface, the power required to ply the water is greatly reduced.<br /><br />Sea-Slide is a patented urethane-based marine overcoat that uses a unique, bonded inter-polymer complex to bind water to the hull. This layer of water reduces friction between the hull and the surrounding water. Less resistance means less hydrodynamic drag, resulting in less turbulence and better speed and acceleration. In simpler terms, the boat’s hull becomes extra slippery when wet, allowing it to slide more easily through the surrounding water. For powerboats and personal watercrafts, this means less fuel is needed to achieve the same speeds. For sailboats, the reduced drag produces higher speeds in lighter winds<br /><br /> http://www.hheadproducts.com/seaslide.htm

 

[AdamB]

Re: Does this speed sound right?

Wow, this thread is getting interesting. Has anybody whos ever had a bottom painted with anti-foul recorded the max speed, then switched to a clean and smoothly waxed bottom and then recorded the speed to see the difference?

 

[tommays]

Re: Does this speed sound right?

i like kicking it back and forth look how many new viewpoints and products we learn about<br /><br />tommays