Interesting Sailboats - Page 155 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Boat Review and Purchase Forum
 Not a Member? 


Like Tree1266Likes
Reply
 
LinkBack Thread Tools
  #1541  
Old 10-19-2011
PCP's Avatar
PCP PCP is offline
Senior Member
 
Join Date: Dec 2004
Location: Portugal, West Coast
Posts: 16,170
Thanks: 21
Thanked 96 Times in 80 Posts
Rep Power: 10
PCP will become famous soon enough
Quote:
Originally Posted by Arpegecap View Post
- nice refresher on Prismatic coefficients.

Best,
Bob
Thanks.

New boat and nothing less than the actual Italian champion:

http://www.campionatoitalianoaltura2...triestewev.pdf

Another 38ft performance cruiser, an Italian one and as most of the Italian sailboats, a beauty: the NM 38.


































The boat looks great and those interiors seem very nice, especially the more modern (less wood) unfortunately they look a lot less impressive in reality:

NM 38 news Salone di Genova.wmv - YouTube

Nautilus Marine NM 38 prova in mare by www.blumag.it - YouTube



They say about the boat:

The hull and deck are constructed under a vacuum, using female moulds and are made in PVC "sandwich" style with unidirectional and biaxial fibers glass and laminated with epoxy resin (with a lifetime guarantee against osmosis).

The carbon fibers used to reinforce the hull bottom gives a greater structural rigidity. Hull and deck are subjected to a post-treatment cycle for maximum performance of mechanical rigidity.

The structure grid is made of carbon and support the loads of the keel, mast and chain-plates, making the entire craft highly secure, even in extreme conditions.

Bulkheads are of marine plywood which are attached to the hull and fixed on the deck. The anti-collision bulkheads forward and aft are made with the same techniques like the hull and deck, so the stern and the bow of the boat are lighter and passing the wave is more comfortable.




It seems great. It is a pity that this boat has a relatively low D/B ratio, 0.309 for a 1.95m draft. A crew seated on the side would not be indispensable but I bet this boat will reef rely soon without it and will have its performance noticeably handicapped. That and an interior a bit impersonal seem to me the only drawbacks for a boat that don't seem very expensive for its quality: 168 000€ without taxes.

About more 38 500€ more than the salona 38, but for having a boat with similar specs (vacuum infused and epoxy resins) the difference would be only 18 300€. However the Salona interiors seems a lot better to me.


Technical specifications
EC Certification: cat. A
Width overall: 11.40 mt
Length water line: 10.15 mt
Full beam: 3.58 mt
Draught: 1.97 / 2.30 mt
Displacement: 5.500 Kg
Ballast: 1.700 Kg
Berths: 2 / 3
Sail Area: 78 mq
Mainsail: 44 mq
Jib 105%: 34.5 mq
Spinnaker area (ORC): 100 mq



....

Last edited by PCP; 10-21-2011 at 08:01 PM.
Reply With Quote Share with Facebook
  #1542  
Old 10-19-2011
Top Sekret Ninja Sailor
 
Join Date: Mar 2008
Location: Somewhat near Naptown
Posts: 128
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
slap is on a distinguished road
Paulo -

In a recent post, you gave two different definitions of prismatic coefficient - one was not correct.


This one is incorrect - this one is the definition of block coefficient.

Quote:
Prismatic Coefficient is a mathematical measurement of the relative shape of the bow and stern of the boat. It displays the ratio of the underwater volume of the hull relative to a rectangular block.
And this is the correct one:

Quote:
We express the "full hull" property by the prismatic coefficient, which is the ratio of volume displaced to the product of waterline length and maximum cross-sectional area.
Reply With Quote Share with Facebook
  #1543  
Old 10-19-2011
Top Sekret Ninja Sailor
 
Join Date: Mar 2008
Location: Somewhat near Naptown
Posts: 128
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
slap is on a distinguished road
PT-11 Three Little Birds

One of the more notable boats at the Annapolis boat show this year was the PT-11 trimaran "Three Little Birds". It is 36 feet long.










The price is around $700K
Reply With Quote Share with Facebook
  #1544  
Old 10-20-2011
Member
 
Join Date: Feb 2011
Posts: 141
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 4
daviid is on a distinguished road
Hi Paulo

Very interesting information on hull speed - thanks very much!

David
Reply With Quote Share with Facebook
  #1545  
Old 10-20-2011
PCP's Avatar
PCP PCP is offline
Senior Member
 
Join Date: Dec 2004
Location: Portugal, West Coast
Posts: 16,170
Thanks: 21
Thanked 96 Times in 80 Posts
Rep Power: 10
PCP will become famous soon enough
Quote:
Originally Posted by slap View Post
Paulo -

In a recent post, you gave two different definitions of prismatic coefficient - one was not correct.


This one is incorrect - this one is the definition of block coefficient.

Quote:
Prismatic Coefficient is a mathematical measurement of the relative shape of the bow and stern of the boat. It displays the ratio of the underwater volume of the hull relative to a rectangular block.



And this is the correct one:

Quote:
We express the "full hull" property by the prismatic coefficient, which is the ratio of volume displaced to the product of waterline length and maximum cross-sectional area.

Slap, I was quoting, not giving definitions and both quotes seems correct to me. The problem here is that is difficult to translate mathematical definitions to words.

In fact both the Prismatic coefficient and the block coefficient are ratios to a box or a prismatic figure as you want to put it.

Block Coefficient... If you draw a box around the submerged part of the ship, it is the ratio of the box volume occupied by the ship.

Prismatic Coefficient... It displays the ratio of the immersed volume of the hull to a volume of a prism with equal length to the ship and cross-sectional area equal to the largest underwater section of the hull (midship section).



http://en.wikipedia.org/wiki/Hull_(watercraft)


These drawings explain it clearly:






http://www.marinetechs.com/Definitions,27



The guy you have said that had given an incorrect definition explains it more detailed (and correctly) on the linked text with this figure an comments:





From the diagram, the longitudinal Cp = Volume / (Am x Lpp) Volume = volume of hull at draft T Am = midship section area (at given draft T, in figure) Lpp = length between perpendiculars.



http://nasailor.com/2011/06/05/boat-...c-coefficient/

Regards

Paulo

Last edited by PCP; 10-20-2011 at 09:12 AM.
Reply With Quote Share with Facebook
  #1546  
Old 10-20-2011
PCP's Avatar
PCP PCP is offline
Senior Member
 
Join Date: Dec 2004
Location: Portugal, West Coast
Posts: 16,170
Thanks: 21
Thanked 96 Times in 80 Posts
Rep Power: 10
PCP will become famous soon enough
Slap,

Thanks for posting about the PT-11.




Lovely boat but with all the problems trimarans have versus same interior sized monohulls: price

The interior is functional but quite impersonal for living aboard. I guess not better than this one from the Corsair 37:








and this one is not so expensive and has the advantage of folding the arms for not paying the double in a marina.

I have to say that the PT 11 looks better (on the outside) and is probably a bit faster but the Corsair does also look good, particularly in its all carbon version that even so it is less expensive than the PT 11.





But if money is not a problem neither space at the marina or the stark interior, for the ones that like to have fun....what a bird!!!!!




















Regards

Paulo

Last edited by PCP; 10-20-2011 at 07:32 AM.
Reply With Quote Share with Facebook
  #1547  
Old 10-20-2011
PCP's Avatar
PCP PCP is offline
Senior Member
 
Join Date: Dec 2004
Location: Portugal, West Coast
Posts: 16,170
Thanks: 21
Thanked 96 Times in 80 Posts
Rep Power: 10
PCP will become famous soon enough



New 360º photo for the Salona 38. Inside and outside, lots of views.


360 - Salona Yachts


The design and quality are good but they have to find another upholsterer. The cushions don't match and that's not the first time that I have saw that on a Salona. How difficult is that? .

The head on the three cabin boat (this one) is too small. It is a good one on the two cabin boat.

Outside the cockpit is really great, except that table that the only advantage is that it can be taken away and mounted in no time. I know that they are studding a new one, hopefully better looking and with handholds for the ones that sail with the table on (it will also be a removable one).





Also a movie taken by the magazine Vela in the Genova boat show:


Salona 38 new.wmv - YouTube



....
Reply With Quote Share with Facebook
  #1548  
Old 10-20-2011
PCP's Avatar
PCP PCP is offline
Senior Member
 
Join Date: Dec 2004
Location: Portugal, West Coast
Posts: 16,170
Thanks: 21
Thanked 96 Times in 80 Posts
Rep Power: 10
PCP will become famous soon enough



The same for the Xp 38, I mean, the movie made by the same magazine in the Genoa boat show. They don't have yet a 360º photo of this one.


Xp 38 new.wmv - YouTube


The cockpit is very similar to the one from Salona and I just love the bowsprit. They guys from Salona are working in one for the 38 and I can just wait that it looks as awesome as this one.

The quality looks good but the Salona is warmer and the cabin of this one looks smaller. I guess that is because they have the head not in front but in the boat center and that makes the saloon smaller. This head is bigger than the one in the three cabin Salona (this is also the three cabin version), but smaller than the one in the Salona two cabin version.

Funny, I cannot find on the x yacht site the drawings for the two cabin version. This is the only version?


..
Reply With Quote Share with Facebook
  #1549  
Old 10-20-2011
PCP's Avatar
PCP PCP is offline
Senior Member
 
Join Date: Dec 2004
Location: Portugal, West Coast
Posts: 16,170
Thanks: 21
Thanked 96 Times in 80 Posts
Rep Power: 10
PCP will become famous soon enough
In the Genova boat show Vela Magazine made also movies about some other boats:

Sly 42 Fun

Sly 42 Fun new.wmv - YouTube


Bavaria 50 cruiser


Bavaria 50 Cruiser new - YouTube

also from FareVela:

http://www.yacht.de/multimedia/yacht...rt/a64063.html


Hanse 385


Hanse 385 new - YouTube

Not from Vela magazine, just a good advertiser from Hanse:

http://www.youtube.com/watch?v=Qlmxkl5KWzs


Catalina 355


Catalina 355 new - YouTube

and since we are talking about Catalina, another good movie made by the German magazine Yacht that tested the 375 (with 6 Beaufort)

http://www.yacht.de/multimedia/yacht...rt/a64063.html


....

Last edited by PCP; 10-20-2011 at 02:50 PM.
Reply With Quote Share with Facebook
  #1550  
Old 10-20-2011
PCP's Avatar
PCP PCP is offline
Senior Member
 
Join Date: Dec 2004
Location: Portugal, West Coast
Posts: 16,170
Thanks: 21
Thanked 96 Times in 80 Posts
Rep Power: 10
PCP will become famous soon enough
One that misses between those boats is the new jeanneau 379, Hanse 385 direct concurrent. Some movies too:


Sun Odyssey 379 - YouTube

Jeanneau Sun Odyssey 379 - Marine Ventures.mov - YouTube




The boat was tested by the German magazine Yacht. Some great photos of that test:




Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 4 (0 members and 4 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cruising sailboats for sale welch Cruising & Liveaboard Forum 10 04-25-2012 05:20 PM
THE Yacht Builder List T37Chef Boat Review and Purchase Forum 26 07-08-2011 05:51 AM
Noob wonderings and questions about sailing, life at sail and sailboats Vans General Discussion (sailing related) 49 06-20-2011 12:18 AM
A List of ALL sailboats made with layouts? Myblueheaven Boat Review and Purchase Forum 8 10-08-2010 11:32 AM
Failure to Navigate - interesting post on Panbo Blog & from the NewsReader Mass Bay Sailors 0 12-11-2006 06:15 PM


All times are GMT -4. The time now is 04:54 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.