 |
|
09-11-2011, 10:32
|
#16
|
Registered User
Join Date: Jul 2011
Location: Mexico City
Boat: Negotiating purchase of 2nd hand yacht
Posts: 460
|
Re: Motion Comfort
Quote:
Originally Posted by Bash
Yeah, it goes up with boat size.
So we needed Ted Brewer to tell us that larger boats tend to be more comfy than smaller boats?
|
He did say it was a Tongue in Cheek measurement.  He knew it was cause consternation on forums like this.
__________________
When I was a boy my momma would send me down to the corner store with $1 and I would come back with 5 potatoes, 2 loaves of bread, 3 bottles of milk, a hunk of cheese, a box of tea and 6 eggs. Can't do that now, too many f**kn security cameras.
|
|
|
09-11-2011, 10:37
|
#17
|
Registered User
Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,769
|
Re: Motion Comfort
Yeah... there's a 30 footer on the list with real high numbers.. wierd. The HC38 looks pretty high, but frankly I hated the motion of that boat in a stiff chop. Alot of the numbers are pretty close together. Not sure this is a a useful tool at all....
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
|
|
|
09-11-2011, 10:38
|
#18
|
Senior Cruiser

Join Date: Jan 2010
Location: PORTUGAL
Posts: 31,297
|
Re: Motion Comfort
Quote:
Originally Posted by Bash
Yeah, it goes up with boat size.
So we needed Ted Brewer to tell us that larger boats tend to be more comfy than smaller boats?
|
Well.... always looks sexier with lotsa Math thrown in...
But for a LOA of 20.9 and W/L of 16.3 she's a lot more comfortable a ride than you'd think...
Have not lost the kettle yet...
I do also think keel/hull shape affects things a lot as well..
__________________

You can't oppress a people for so many decades and have them say.. "I Love You.. ".
"It is better to die standing proud, than to live a lifetime on ones knees.."
Self Defence is no excuse for Genocide...
|
|
|
09-11-2011, 10:39
|
#19
|
CF Adviser
Join Date: Dec 2008
Location: sausalito
Boat: 14 meter sloop
Posts: 7,260
|
Re: Motion Comfort
Quote:
Originally Posted by Target9000
It goes up with boat size GENERALLY. But you can see in the list I posted, this doesn't always hold true.
Spencer 53, Motion Comfort=35.31
Spray 38 Centennial (Roberts), Motion Comfort=46.39
|
I'll take the Spencer any day, thank you very much.
__________________
cruising is entirely about showing up--in boat shoes.
|
|
|
09-11-2011, 10:42
|
#20
|
Registered User
Join Date: May 2009
Posts: 1,379
|
Re: Motion Comfort
Quote:
Originally Posted by Bash
I'll take the Spencer any day, thank you very much.
|
Duh! Who wouldn't? The one guy sitting in the back looking at CR as some sort of holy grail because a boat broker whispered it into his ear along with dropping Ted Brewer's name?
__________________
Let your heart tell you where to go, but let your brain tell you how to get there.
|
|
|
09-11-2011, 10:44
|
#21
|
Marine Service Provider
Join Date: Aug 2010
Location: north carolina
Boat: command yachtsdouglas32
Posts: 3,113
|
Re: Motion Comfort
Quote:
Originally Posted by Cheechako
Has little to do with the full keel. More to do with the hull shape, amount of overhang and short waterline etc. Narrow boats, with very round bilges and long overhangs will roll and pitch in the right water. It's an interesting thing. When I lived aboard in Seattle, I used to watch boats at the dock during windy weather. There was one rather new design by a noted designer that always rolled a lot tied to the dock. It was supposedly an offshore fast design. It rolled so much that once it looked like it might actually have a mast clash with the boat next door.
|
was it a C&C 29?..I see one at a marina here that cant keep still, rolls from side to side at the slightest wake..looks like its going to hit the boats mast that are beside it...DVC
|
|
|
09-11-2011, 10:49
|
#22
|
Registered User
Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,769
|
Re: Motion Comfort
Saga....43?
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
|
|
|
09-11-2011, 10:56
|
#23
|
Registered User
Join Date: Aug 2009
Location: Hudson Valley N.Y.
Boat: contessa 32
Posts: 826
|
Re: Motion Comfort
O.K. Its not the speed that makes one comfortable/uncomfortable its the accelerations.
Big difference; at 600mph I can enjoy my drink on a 747,but be miserable at 6 kts. When a boat is being jerked(slammed) about in any of the 6( or is it 7?) different motions a boat experiences in a seaway. Mass and hull form are the biggest factors;mass confers inertia so smaller accelerations.Hull form determines how the hull reacts to the forces (seastate) acting upon its various sections. Rock on the bottom=no accelerations. Ping pong ball=wild ride.
|
|
|
09-11-2011, 10:57
|
#24
|
Registered User
Join Date: Apr 2011
Posts: 2,492
|
Re: Motion Comfort
Mine rolls a bit under power, and also pitches back and forth a bit. But put up the sails, especially going upwind, she settles down nicely and really slices through a chop.
|
|
|
09-11-2011, 11:45
|
#25
|
Registered User
Join Date: Jul 2005
Location: Bellingham
Boat: Outbound 44
Posts: 9,319
|
Re: Motion Comfort
Quote:
Originally Posted by Cheechako
Saga....43?
|
It is listed in the Sail Calculator as 28.02
The original posters description seems a little off. Saying that there is a set of conditions offshore that are comfortable in a 42 ft boat doesn't say much about comfort. There is also a set of conditions that sux in almost any under 50 ft boat.
I just don't put any credence in the Motion Comfort ratio. I have a fair amount of experience offshore in two boats that are close to the same length and similar design weight. One has ratio of 36 and the other 21. I am far less likely to get seasick on the one with the 21 ratio. It is just a much more comfortable ride in medium or rough weather for me and my susceptibility to seasickness. Comfort is in the eye of the beholder.
__________________
Paul
|
|
|
09-11-2011, 12:00
|
#26
|
Registered User
Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,769
|
Re: Motion Comfort
Maybe that formula does work! Although this was rolling....
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
|
|
|
09-11-2011, 12:28
|
#27
|
Registered User
Join Date: Apr 2010
Location: B.C. Canada / San Carlos, Sonora
Boat: Tayana 37
Posts: 168
|
Re: Motion Comfort
Not to worry Boatman, as long as you can lay on the floor without holding on!
__________________
When we remember we are all mad, the mysteries disappear and life stands explained.
Mark Twain
|
|
|
09-11-2011, 12:29
|
#28
|
Registered User
Join Date: Aug 2010
Location: Naples, FL
Boat: Leopard Catamaran
Posts: 2,584
|
Re: Motion Comfort
Where are Hunters and Macgregors on that list?
|
|
|
09-11-2011, 12:30
|
#29
|
Senior Cruiser

Join Date: Jan 2010
Location: PORTUGAL
Posts: 31,297
|
Re: Motion Comfort
Quote:
Originally Posted by Bluefuss
Not to worry Boatman, as long as you can lay on the floor without holding on! 
|
My Man....
__________________

You can't oppress a people for so many decades and have them say.. "I Love You.. ".
"It is better to die standing proud, than to live a lifetime on ones knees.."
Self Defence is no excuse for Genocide...
|
|
|
09-11-2011, 13:15
|
#30
|
Registered User
Join Date: Nov 2007
Boat: Beneteau FIRST 42
Posts: 1,836
|
Re: Motion Comfort
Because its a set formula set for a determined condition, if you change the condition, you also change the end result..
If the boat is rising and falling to be uncomfortable, you change directions to sail in the trough and the comfort changes..
It seems that the comfort motion of the boat has as much to do with the person opperating it as much as the type of boat it is..
|
|
|
 |
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Rate This Thread |
Linear Mode
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Advertise Here
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
Vendor Spotlight |
|
|