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Natural roll period?

SD
Steven Dubnoff
Wed, Sep 19, 2007 9:06 PM

Does anyone know the method for determining the natural roll period
of a boat?  Is this something you can do yourself at the dock?

Thanks,

Steve

Steve Dubnoff
1966 Willard Pilothouse
www.mvnereid.com
sdubnoff@circlesys.com

Does anyone know the method for determining the natural roll period of a boat? Is this something you can do yourself at the dock? Thanks, Steve Steve Dubnoff 1966 Willard Pilothouse www.mvnereid.com sdubnoff@circlesys.com
T
trawlerdoc@aol.com
Wed, Sep 19, 2007 9:34 PM

It can be done at the dock. When we did Rollsdoc we extended the paravane arms and pulled down on them. You might enlist a few freinds and have them rock the boat from the dock. It'll only roll so fast. Easy to time.

Rodger

-----Original Message-----
From: Steven Dubnoff sdubnoff@circlesys.com
To: trawlers-and-trawlering@lists.samurai.com
Sent: Wed, 19 Sep 2007 5:06 pm
Subject: T&T: Natural roll period?

Does anyone know the method for determining the natural roll period
of a boat?  Is this something you can do yourself at the dock?

Thanks,

Steve

Steve Dubnoff
1966 Willard Pilothouse
www.mvnereid.com
sdubnoff@circlesys.com


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It can be done at the dock. When we did Rollsdoc we extended the paravane arms and pulled down on them. You might enlist a few freinds and have them rock the boat from the dock. It'll only roll so fast. Easy to time. Rodger -----Original Message----- From: Steven Dubnoff <sdubnoff@circlesys.com> To: trawlers-and-trawlering@lists.samurai.com Sent: Wed, 19 Sep 2007 5:06 pm Subject: T&T: Natural roll period? Does anyone know the method for determining the natural roll period of a boat? Is this something you can do yourself at the dock? Thanks, Steve Steve Dubnoff 1966 Willard Pilothouse www.mvnereid.com sdubnoff@circlesys.com _______________________________________________ http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering To unsubscribe or modify your subscription options (get password, change email address, etc) go to: http://lists.samurai.com/mailman/options/trawlers-and-trawlering Trawlers & Trawlering and T&T are trademarks of Water World Productions. Unauthorized use is prohibited. ________________________________________________________________________ Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com
BC
Bob Clinkenbeard
Wed, Sep 19, 2007 9:55 PM

Hmm....When I first stepped aboard my boat to do the seatrial,  I was
surprised that it rolled so easy....it is small.    I have never been
seasick and natural motion does not seem to bother me, but this boat is
smaller that any I have ever owned and I am concerned.  My plan is to get
some miles under the keel and see how I feel about it then....but since this
subject has come up..........
I have read since that these boats have a pretty good roll and some have
considered and added ballast.
How can I use the roll period information to consider if something needs to
be done to make my boat more comfortable..or not?
This is definitely a near shore and protected water boat that will hopefully
never see a moderate or rough sea.
Thanks,

Bob Clinkenbeard
24' custom trailer trawler
http://home.bellsouth.net/p/PWP-aboardbobbinalong

Snip.......

It can be done at the dock. When we did Rollsdoc we extended the paravane
arms and pulled down on them. You might enlist a few freinds and have them
rock the boat from the dock. It'll only roll so fast. Easy to time.

Snip........

Does anyone know the method for determining the natural roll period
of a boat?  Is this something you can do yourself at the dock?

Hmm....When I first stepped aboard my boat to do the seatrial, I was surprised that it rolled so easy....it is small. I have never been seasick and natural motion does not seem to bother me, but this boat is smaller that any I have ever owned and I am concerned. My plan is to get some miles under the keel and see how I feel about it then....but since this subject has come up.......... I have read since that these boats have a pretty good roll and some have considered and added ballast. How can I use the roll period information to consider if something needs to be done to make my boat more comfortable..or not? This is definitely a near shore and protected water boat that will hopefully never see a moderate or rough sea. Thanks, Bob Clinkenbeard 24' custom trailer trawler http://home.bellsouth.net/p/PWP-aboardbobbinalong Snip....... It can be done at the dock. When we did Rollsdoc we extended the paravane arms and pulled down on them. You might enlist a few freinds and have them rock the boat from the dock. It'll only roll so fast. Easy to time. Snip........ Does anyone know the method for determining the natural roll period of a boat? Is this something you can do yourself at the dock?
TN
Terrence Neill
Thu, Sep 20, 2007 5:13 AM

<snip

Does anyone know the method for determining the natural roll period
of a boat?  Is this something you can do yourself at the dock?

snip>

Any method you can use to get the boat rolling at the dock is all it
takes.
I can stand on the dock with one foot on the  boat's guard. By
transferring my weight appropriately I can make the boat roll quite
nicely. Any other method you use to make your boat roll will do.
Time it from the top of one roll to the top of the next.

That's it.

Shouldn't vary measurably for a big or small roll amplitude.

Terry
Tamarack

<snip > Does anyone know the method for determining the natural roll period > of a boat? Is this something you can do yourself at the dock? snip> Any method you can use to get the boat rolling at the dock is all it takes. I can stand on the dock with one foot on the boat's guard. By transferring my weight appropriately I can make the boat roll quite nicely. Any other method you use to make your boat roll will do. Time it from the top of one roll to the top of the next. That's it. Shouldn't vary measurably for a big or small roll amplitude. Terry Tamarack