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Posted: Tue Sep 05, 2006 9:56 am
by scottrunnr
What are venturi drains and how do you install them?
Posted: Tue Sep 05, 2006 11:26 am
by Kayak Jack
scottrunnr wrote:What are venturi drains and how do you install them?
A venturi generates the Bernoulli principle. A slip stream of fluid (liquid or a gas) exerts less pressure (a partial vacuum) sideways when it moves, than when it is stationary. That's what makes a carburetor work, perfume sprayers too.
When Mick achieves a hull speed of 0.002 Mach, it will suck his kayak dry.
Posted: Tue Sep 05, 2006 11:33 am
by jem
it's a drain that causes a suction effect. As the hull moves and water flows past the venturi on the hull outter skin, it sucks the water out of the other end.
Draw back is you have to be moving for them to work. Unless you go with like a battery powered pump or something.
Posted: Tue Sep 05, 2006 12:25 pm
by scottrunnr
Gotcha. I'll stick with the scuppers. Though I have to admit that I'm a bit apprehensive about cutting the holes in the hull for the scuppers.
Posted: Tue Sep 05, 2006 4:37 pm
by hairymick
Hi Guys,
My venturi's will be angled down and back at about 10 degrees so they will drain when stationary.
Posted: Tue Sep 05, 2006 5:44 pm
by Kayak Jack
Gonna have a check valve on those hummers?
Posted: Tue Sep 05, 2006 6:18 pm
by jem
hairymick wrote:Hi Guys,
My venturi's will be angled down and back at about 10 degrees so they will drain when stationary.
Are they 2 pieces with a tube connecting?
I guess I'm kinda lost on how you'll do it.
Posted: Tue Sep 05, 2006 7:12 pm
by jcubero
You could always seal yourself into the kayak with one of those rubber gaskets, then have a large plate of beans. The resulting positive pressure will keep the boat totally dry
Posted: Tue Sep 05, 2006 9:37 pm
by paddling4sharks
Mornin';
...be careful, sometimes the incomin' supercedes the outgoin'
Posted: Tue Sep 05, 2006 9:52 pm
by Kayak Jack
Pretty low wind signature, ehh?