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Old 04-09-2012, 10:55 PM   #11
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I have always noticed oscillating vorticies coming off the stern. Didn't think it was a big deal. Mostly from the prop I figured.

Todd
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Old 04-11-2012, 03:37 PM   #12
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hmm...that does sound like a mess of free play on the drive...you might need to go inside and check the rack and pinion steering arm...see if it's extremely worn...

vortex shedding really doesn't apply with fluids and boats......http://en.wikipedia.org/wiki/Vortex_shedding

it mainly applies to poles or buildings in turbulant air....boats don't usually exibit this phenomina ...what your probably seeing behind your boat is eddy turbulance from the props making swirling formations of water.......

what he's experiencing is bow wander..

SP
I checked The Rack and Pinion, Everything is Tight.... no end Play (Axial or Radial), So I guess it normal.... The Piston does go in and out as the Leg is moved (3 or 4 inches)(but the Steering Wheel doesn't move (if I move the LEG more than 3-4in then the Steering Wheel will move)

Todd
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Old 04-16-2012, 03:38 PM   #13
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Quote:
Originally Posted by seapuppy View Post
hmm...that does sound like a mess of free play on the drive...you might need to go inside and check the rack and pinion steering arm...see if it's extremely worn...

vortex shedding really doesn't apply with fluids and boats......http://en.wikipedia.org/wiki/Vortex_shedding

it mainly applies to poles or buildings in turbulant air....boats don't usually exibit this phenomina ...what your probably seeing behind your boat is eddy turbulance from the props making swirling formations of water.......

what he's experiencing is bow wander..

SP


Hey SP, ran across this article today. It was sent in an iBoats email that I normally delete but it caught my eye

http://www.iboats.com/review_monthly..._article2.html

Seems CountryME is dead on here with Vortex Shedding as the cause


Still does not help Todd with his 3 to 4 inches of free play, sorry about that.
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Old 04-16-2012, 06:08 PM   #14
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Hey SP, ran across this article today. It was sent in an iBoats email that I normally delete but it caught my eye

http://www.iboats.com/review_monthly..._article2.html

Seems CountryME is dead on here with Vortex Shedding as the cause


Still does not help Todd with his 3 to 4 inches of free play, sorry about that.

One of the things that it talks about is "Put the tabs down. If you have trim tabs, try putting them down all the way. These can act as horizontal stabilizers to keep the stern from wagging. "
my other boat had smart Tabs and it didn't have this problem, but this boat does not have Tabs sooooo another reason I should get some smart tabs..lol when I have the budget $$$

WOW Who Knew!!!! LOL

Thanks SP and Country ME

Todd
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Old 04-16-2012, 07:01 PM   #15
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Don't plan on tabs eliminating the problem Todd. I've got hydro tabs on mine and, while they do help a bit, it still wanders around.

I just learned to give it very small corrections.

Dan
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