DIY Bowsprit - SailNet Community
 2Likes
Reply
 
LinkBack Thread Tools
post #1 of 12 Old 01-15-2014 Thread Starter
Junior Member
 
Join Date: Jan 2014
Posts: 2
Thanks: 4
Thanked 0 Times in 0 Posts
Rep Power: 0
 
DIY Bowsprit

I have been thinking of adding a bowsprit to my J24. Not to use for racing, just for the light air cruising days. I would fly a genaker. Could a retrofit kit damage the bow with unsupported upward forces? Would the tack of the standard 150 genoa chaff on the pole attached to the deck? Is it worth it, or should I just attach the tack of the genaker to the tack of the genny (inside the forestay)?
sugerpeople is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 12 Old 01-15-2014
Senior Member
 
Lake Superior Sailor's Avatar
 
Join Date: Aug 2011
Location: Eagle River Wi.
Posts: 959
Thanks: 0
Thanked 8 Times in 8 Posts
Rep Power: 4
 
Re: DIY Bowsprit

Sail mag did a nice write up on that, you might want to read last month.....Dale

Reluctant Lady
Cal 28, 1967
Lake Superior
Where God got it done!
Lake Superior Sailor is offline  
Quote Quick Reply Share with Facebook
post #3 of 12 Old 01-15-2014
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,522
Thanks: 104
Thanked 309 Times in 299 Posts
Rep Power: 10
     
Re: DIY Bowsprit

Adding such a sprit can really enhance the use of an Asymm.. but don't underestimate the loads it might see, esp lifting loads.

Our son put one on his (then) Ranger 29.. he added a bow eye low on the stem and ran a dyneema 'bobstay' to handle that load. It was about an 18-24 inch extension and worked well for him.
christian.hess likes this.

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is online now  
Quote Quick Reply Share with Facebook
The Following User Says Thank You to Faster For This Useful Post:
sugerpeople (01-19-2014)
post #4 of 12 Old 01-15-2014 Thread Starter
Junior Member
 
Join Date: Jan 2014
Posts: 2
Thanks: 4
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: DIY Bowsprit

I read the article in Sail, that's where I got the idea from, but unfortunately it raised more questions than answered.
sugerpeople is offline  
Quote Quick Reply Share with Facebook
post #5 of 12 Old 01-15-2014
Sea Sprite 23 #110 (20)
 
mad_machine's Avatar
 
Join Date: Dec 2012
Location: Atlantic City, NJ
Posts: 3,217
Thanks: 5
Thanked 69 Times in 60 Posts
Rep Power: 3
 
Re: DIY Bowsprit

I will have to find the article. I had dreams of rerigging my SS23 into a cutter

Art Haberland
__________________

In the end all that matters is how fully you loved, how gently you lived, and how gracefully you let go of things that did not belong to you -Buddha

__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mad_machine is offline  
Quote Quick Reply Share with Facebook
The Following User Says Thank You to mad_machine For This Useful Post:
sugerpeople (01-19-2014)
post #6 of 12 Old 01-15-2014
Senior Member
 
Join Date: Feb 2012
Location: New Orleans Louisiana
Posts: 2,335
Thanks: 7
Thanked 80 Times in 76 Posts
Rep Power: 4
 
Re: DIY Bowsprit

It really, really depends on what you want to fly from it, and in what conditions. The requirements for a code sail, a genniker, and a deep running asym are vastly different because of the different luff tension that is applied. So first figure out what you expect to fly from the pole, then figure out how far out it you want it to be.

If you are just flying a runner from a short pole just about anything will work. The loads are pretty light, and the shorter the pole the smaller the leaver arm. If you want to fly a code at the end of a long pole... Well the leaver arm is longer, and the halyard tension is substantial.

I wouldn't even bother trying to calculate this from first principle. Go take a look at the Selden retrofit pole, and match what you install to what they have designed. Alternatively buy it from them, I have had a lot of luck with their retrofit stuff to date.

Greg Rubin
Attorney
Stumble is offline  
Quote Quick Reply Share with Facebook
The Following User Says Thank You to Stumble For This Useful Post:
sugerpeople (01-19-2014)
post #7 of 12 Old 01-16-2014
Senior Member
 
SchockT's Avatar
 
Join Date: May 2012
Location: North Vancouver, BC
Posts: 1,428
Thanks: 1
Thanked 27 Times in 25 Posts
Rep Power: 4
 
Re: DIY Bowsprit

If you are talking about light air cruising with a modest sized chute then you don't have too much to worry about assuming your deck is structurally sound and not spongy. The Selden kits rely on a couple of bolts through the deck with a backing plate to take the whole load.

On the other hand, if you think you might be tempted to try the setup out in phrf racing with a full crew hiking on a power reach, then you might want to consider over engineering it a bit!

1979 Santana 30 Tall Rig
Hull#101
SchockT is offline  
Quote Quick Reply Share with Facebook
post #8 of 12 Old 01-16-2014
Member
 
Join Date: Sep 2012
Posts: 74
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 3
 
Re: DIY Bowsprit

Quote:
Originally Posted by Faster View Post
Our son put one on his (then) Ranger 29.. he added a bow eye low on the stem and ran a dyneema 'bobstay' to handle that load. It was about an 18-24 inch extension and worked well for him.
I did one using dyneema and a pc. of Hobie-cat boom on my Catalina 27. It stood the test this summer when the old C27 hit 7+ in 20+kt winds. I love it, and the "old salts" around me were rather impressed.
I would have to draw a picture because it is dis-assembled on the hard now.
If you need me to, let me know.
Cheers,
Joel H.
christian.hess likes this.
Joel H. is offline  
Quote Quick Reply Share with Facebook
post #9 of 12 Old 01-16-2014
Sea Sprite 23 #110 (20)
 
mad_machine's Avatar
 
Join Date: Dec 2012
Location: Atlantic City, NJ
Posts: 3,217
Thanks: 5
Thanked 69 Times in 60 Posts
Rep Power: 3
 
Re: DIY Bowsprit

my reasons for a sprit are for a genny. The working sail on my Sprite already overlaps the mast some. plans are to reduce it some ( sail singlehanded) and make it self tacking and then as the rig is a fractional, add a sprit to run a furling genny

Art Haberland
__________________

In the end all that matters is how fully you loved, how gently you lived, and how gracefully you let go of things that did not belong to you -Buddha

__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mad_machine is offline  
Quote Quick Reply Share with Facebook
post #10 of 12 Old 01-16-2014
"Nubile Southern Sailor"
 
christian.hess's Avatar
 
Join Date: Sep 2013
Location: Columbus, Ga
Posts: 4,522
Thanks: 181
Thanked 181 Times in 177 Posts
Rep Power: 2
 
Re: DIY Bowsprit

dont go too crazy in length as j24s can get squirelly off the wind...make sure all crew are way aft...not to mention changes in helm feel.

I thought a good compromise is to have a retractable chute pole like many racing boats have...especially dinghies(i14, skiffs, 49ers, etc)

you can make a sprit from pvc filled with foam and wrapped etc...have sturdy mounts(eyes) through bolted and backed up with plates down below and then a simple pulley system to retrieve and retract the pole

or you could go way simple and just add a small stainless sprit with a very small cable or dyneema to save weight down to the waterline with a turnbuckle up top...or not even just tie it up taught since the chute will pull upwards...

basically no longer than a foot is all you need to get the chute clear of the bow

just some thoughts

we have a j24 down here that we used to regularly do all sorts of fun stuff to it to "improve" sailing characterustics...jajaja

Islander 36 now FOR SALE!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
christian.hess is offline  
Quote Quick Reply Share with Facebook
Reply

Tags
bowsprit , diy , j24

Quick Reply
Message:
Options

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
DIY - discussion on building a DIY hookah diving compressor stopher2 Gear & Maintenance 150 10-08-2014 04:02 PM
Retractable Bowsprit DIY Joel H. General Discussion (sailing related) 41 01-15-2013 09:12 AM
bowsprit wood Windkiller Gear & Maintenance 27 11-20-2011 09:41 AM
Bowsprit glegh Sailboat Design and Construction 5 04-13-2009 11:08 AM
bent bowsprit sailhog Gear & Maintenance 7 04-27-2007 08:40 PM

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