SailNet Community - View Single Post - Full or fin keel?
View Single Post
post #508 of Old 10-03-2012
Senior Member
chucklesR's Avatar
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,979
Thanks: 10
Thanked 31 Times in 31 Posts
Rep Power: 12
Re: Full or fin keel?

Ted Brewer's Motion Comfort Ratio might be germane:
MCR = Disp / (2/3*((7/10 * LWL)+(1/3 *LOA))*Beam4/3 )

Now for me that's a little too much math so I go here The roll acceleration: What´s the best for crossing oceans? - Boat Design Forums
and look up a boat. Unfortunately mine is not listed.

Note the formula does not take in keel shape at all - a surprising lack considering the effect of lift and weight, moment arms and all that other 'stuff' that has kept this thread growing.
Of course it also shows Brewer designs as being seriously comfortable.

I also can't see where LOA comes in - my bow spit adds nothing to comfort - that should be LO deck.

Lessons learned are opportunities earned.
chucklesR is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome