Performance with dinghy on the foredeck - SailNet Community
 1Likes
Reply
 
LinkBack Thread Tools
post #1 of 24 Old 04-30-2012 Thread Starter
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,254
Thanks: 0
Thanked 27 Times in 27 Posts
Rep Power: 8
 
Performance with dinghy on the foredeck

I am going to be building a dinghy that will fit on the foredeck of my Bristol 27. Will the additional windage have a huge effect on performace?

Bristol 27
Cirque
Barquito is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 24 Old 04-30-2012
Senior Member
 
Join Date: Dec 2006
Posts: 296
Thanks: 10
Thanked 3 Times in 3 Posts
Rep Power: 9
 
Re: Performance with dinghy on the foredeck

on my ship[pearson 32] i fell there is better preformance with 8 foot walker on deck as opposed to towing maybe a half a knot which is a lot in 24 hrs=12 natical miles extra made good plus it wont swamp in high seas
norsearayder is offline  
Quote Quick Reply Share with Facebook
post #3 of 24 Old 04-30-2012
I don't discuss my member
 
zz4gta's Avatar
 
Join Date: Aug 2007
Location: Chesapeake Bay
Posts: 2,530
Thanks: 0
Thanked 31 Times in 31 Posts
Rep Power: 8
 
Re: Performance with dinghy on the foredeck

Only when the wind blows. The answer is yes, it'll effect performance. Windage and weight on the bow are bad. Dragging something behind you is also slow. Pick your poison. You will definitely notice it when the wind pipes ups.

Merit 25 # 764 "Audrey"
zz4gta is offline  
Quote Quick Reply Share with Facebook
post #4 of 24 Old 04-30-2012
Senior Member
 
jackdale's Avatar
 
Join Date: Dec 2008
Location: Calgary, AB, Canada
Posts: 9,031
Thanks: 27
Thanked 59 Times in 56 Posts
Rep Power: 7
 
Re: Performance with dinghy on the foredeck

In my experience windage has less effect on vessel performance than drag.

Crew performance is affected by having something to work around on the foredeck.

I do not want to worry about towing a tender in following seas. We get the tender on deck before heading into bluewater.

__________________
ISPA Yachtmaster Offshore Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203, 204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)
jackdale is offline  
Quote Quick Reply Share with Facebook
The Following User Says Thank You to jackdale For This Useful Post:
sharkbait (03-30-2014)
post #5 of 24 Old 04-30-2012
tdw
Super Fuzzy Moderator
 
tdw's Avatar
 
Join Date: Oct 2006
Location: Sydney Australia
Posts: 16,478
Thanks: 15
Thanked 103 Times in 97 Posts
Rep Power: 10
     
Re: Performance with dinghy on the foredeck

I hate towing when under sail. For whatever reason it just irritates me. OTOH, stowing on the fore deck when under 35' can be a pain if you need to get up front for any reason. whatever you decide the dinghy needs to be as minimal as possible.

Andrew B

“Life is a trick, and you get one chance to learn it.”
― Terry Pratchett, Nation

Malo 39 Classic
tdw is offline  
Quote Quick Reply Share with Facebook
post #6 of 24 Old 05-01-2012
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 11,101
Thanks: 46
Thanked 229 Times in 214 Posts
Rep Power: 7
   
Re: Performance with dinghy on the foredeck

I would think the minimum length for a dink is 8ft, which is nearly a third the length of your vessel. I just don't think its practical to haul it on deck, regardless of windage. An inflatable (ie deflatable) would be best IMHO.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Minnewaska is offline  
Quote Quick Reply Share with Facebook
post #7 of 24 Old 05-01-2012 Thread Starter
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,254
Thanks: 0
Thanked 27 Times in 27 Posts
Rep Power: 8
 
Re: Performance with dinghy on the foredeck

Quote:
How often do you think you would use your dinghy, for getting provisions, or exploring on shore ? What about a Kayak instead ?
How Many Feet do you have for dinghy space ? Do you have a roller furling and how is your anchor connected to boat (anchor roller) ?
I think I would only put the dinghy on deck if I were to be on longer passages, or if I expect bad weather. O/w, I would want easier access to the dinghy. The dinghy is about 7'6". It will extend to about the mooring cleat, which is a couple feet from the bow. Because the dinghy is a sharpie rather than a pram, there will be a constant foot or so of side-deck space all the way to the bow. There is still room at the bow, but, it is a little bit of a concern that I do have hank-on sails. I will probably be a bit more conservative with my sail choice so I don't have to change much. I just don't like the idea of dragging my dink through the short steep waves of Lake Michigan in the middle of the night.

Quote:
I would think the minimum length for a dink is 8ft, which is nearly a third the length of your vessel. I just don't think its practical to haul it on deck, regardless of windage. An inflatable (ie deflatable) would be best IMHO.
The two major down sides to using an inflatable for me is that most don't row very well (don't want OB), and the cost. After this summer, I may agree with you. We'll see.

My concern with the original post was that I might be creating enough windage up front that I will not be able to keep the bow into the wind. I suppose in higher wind, the boat will heel and mostly block the dinghy from the wind.
sidney777 likes this.

Bristol 27
Cirque
Barquito is offline  
Quote Quick Reply Share with Facebook
post #8 of 24 Old 05-01-2012
S/V Lilo, Islander 32
 
Join Date: Apr 2008
Location: Lafayette, Oregon
Posts: 249
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 8
 
Re: Performance with dinghy on the foredeck

We build a Spindrift 11 foot nesting dingy, nested its about 6 foot long. We went for the hard dingy for the same reasons, I like to row and don;t want an outboard. Eventually it will have a sailing rig as well.

We put it on the bow of our Islander 32, which is a bit bigger then your boat. I haven't really noticed any windage issues but then again, I'm not exactly a performance sailor, and might simply not be noticing the difference. In either case, I would say its not a drastic amount.

I'm curious what design your planning to build, our if it's your own design, and if this is your first boat you'll be building, or if you've built others. The plans for the spin drift come in a 9 foot nesting version as well, which nests to under 5 feet. Might be worth investigating if your open to other options. spindrift

We also like the nesting version for ease of loading and unloading. Both halves float independently so you can lift and lower them one at a time, and assemble it in the water. Plus it makes a great conversation starter!

S/V Lilo
1964 Islander 32
Saint Helens, OR
IslanderGuy is offline  
Quote Quick Reply Share with Facebook
post #9 of 24 Old 05-01-2012 Thread Starter
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,254
Thanks: 0
Thanked 27 Times in 27 Posts
Rep Power: 8
 
Re: Performance with dinghy on the foredeck

Quote:
I'm curious what design your planning to build, our if it's your own design, and if this is your first boat you'll be building, or if you've built others. The plans for the spin drift come in a 9 foot nesting version as well, which nests to under 5 feet. Might be worth investigating if your open to other options.
I built a D4 (www.bateau.com/freeplans.php) about 5 years ago out of 1/4" exterior ply. It is falling apart a little, but worked very well. The one I'm doing this summer will be the Polliwog, by Devlin (Devlin Designing Boat Builders). It is just a little shorter, has a longitudinal bench, and with 4 mm okoume, will weigh a lot less. I thought about doing a nesting boat, but didn't want to have to assemble the boat to get to shore after a passage.

Bristol 27
Cirque
Barquito is offline  
Quote Quick Reply Share with Facebook
post #10 of 24 Old 05-01-2012
S/V Lilo, Islander 32
 
Join Date: Apr 2008
Location: Lafayette, Oregon
Posts: 249
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 8
 
Re: Performance with dinghy on the foredeck

The Polliwog's a sharp looking boat! good choice. I like Devlin designs to, although I've mostly looked at his larger stuff as he had several for sale in a marina near ours a few years back. Looks like she'll compliment the big boat nicely too. I think rowing a boat like that around the anchorage will be worth a few degrees of pointing if it comes to that

S/V Lilo
1964 Islander 32
Saint Helens, OR
IslanderGuy is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Can anyone identify this part on my foredeck photogrocker Gear & Maintenance 13 11-26-2011 03:48 PM
Masthead/ foredeck combination light simpsoned Electrical Systems 9 08-15-2011 06:03 PM
Foredeck and Cockpit Awning Question. patrickrea Gear & Maintenance 13 01-27-2009 09:27 AM
Heineken High Performance Dinghy Open, 11/12 Oct Bowgirl Racing 8 10-20-2008 11:56 AM
N35 Foredeck Hatch DanLegg Niagara 0 09-16-2008 11:29 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome