Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 01-11-2018, 15:31   #1
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: 1987 Cabo Rico 38 #117
Posts: 3,875
Carbon Fiber Wind Generator Mast

Hi all,

We are in the process of buying a new boat that does not have a wind gen, which we want to add. Our current boat has a wind gen and a stainless steel mast that is a beast.... weighs a ton.

I was thinking that I would rather go with lightweight components on the new boat since itís much more performance oriented, including a carbon fiber wind generator mast. However I donít know if carbon fiber tubes are an appropriate selection for a wind generator or the details on how you would spec out the mast.

Looking for feedback...

-z
__________________

zboss is offline   Reply With Quote
Old 01-11-2018, 16:38   #2
Registered User

Join Date: Dec 2009
Location: Australia
Boat: building Roberts Mauritius 43ft
Posts: 901
Re: Carbon Fiber Wind Generator Mast

I found a sail board mast on the rubbish dump and brought it home as I have wondered if that would make a wind generator mast. (the wind generators I have looked at are quite light). The mast is f/g, slightly bendy and light-weight.

Maybe that is the way to go?

Clive
Attached Thumbnails
Click image for larger version

Name:	Temp sailboard mast.JPG
Views:	75
Size:	23.2 KB
ID:	179995  
__________________

coopec43 is offline   Reply With Quote
Old 01-11-2018, 16:52   #3
Registered User

Join Date: Feb 2013
Location: Rio Dulce, Guatemala
Boat: Seafarer36c
Posts: 4,944
Re: Carbon Fiber Wind Generator Mast

We have a large wind generator and it's mounted on a 1 1/2"seamless SS tube with a wall thickness of only .060". It's light.
Ecos is offline   Reply With Quote
Old 01-11-2018, 17:09   #4
Registered User

Join Date: Jun 2018
Boat: Aluminium Ketch 37ft 1956
Posts: 142
Re: Carbon Fiber Wind Generator Mast

I did what you are thinking about but probably in a different setting. The fiberglass (not even carbon) tube I used is about 5ft length and on top of my mizzen mast. It holds an Air Breeze. The fiberglass tube is in a foot which has a supporting 3 inch collar. That's it, no wires or other supports.


It's been up there for 3 years. Atlantic crossing included. I did not worry about the strength of the fiberglass tube at all, once I tested it...
Attached Thumbnails
Click image for larger version

Name:	glasfiber.jpg
Views:	76
Size:	4.3 KB
ID:	179996  
Standbly is offline   Reply With Quote
Old 01-11-2018, 17:34   #5
cruiser

Join Date: Jun 2010
Location: Easton, MD
Boat: Catalina 22 Capri, 15' Catboat, Bristol 35.5
Posts: 2,293
Re: Carbon Fiber Wind Generator Mast

Aluminum would also work. Carbon fiber would be lighter but not as durable or crush resistant.
kmacdonald is offline   Reply With Quote
Old 01-11-2018, 18:08   #6
Registered User

Join Date: Mar 2017
Posts: 289
Re: Carbon Fiber Wind Generator Mast

Stanbly is right. For smaller items, the difference in weight between carbon fiber and fiberglass is pretty negligible (you just have to make the fiberglass thicker to match the carbon rigidity) while the cost difference is significant.

Now, passerelles, biminis, and other larger structures greatly benefit from going carbon as the weight difference will be larger.

Here's a great video describing the difference between the materials regarding strength and stiffness:
Thalas is offline   Reply With Quote
Old 01-11-2018, 18:53   #7
Registered User
 
mrybas's Avatar

Join Date: May 2010
Location: East Coast USA or out cruising
Boat: Lock Crowther 150
Posts: 503
Re: Carbon Fiber Wind Generator Mast

Click image for larger version

Name:	IMG_0323.jpg
Views:	89
Size:	61.6 KB
ID:	179998Click image for larger version

Name:	IMG_0195.jpg
Views:	91
Size:	101.8 KB
ID:	179999

I laid up a 12í carbon pole over a 3Ē PVC pipe that was used as a mold. 3í of the pole is buried below the deck and glassed to the inside of the hull. I havenít weighed it, but Iíd guess itís about 15-20 lbs.
The pole probably cost about $350 in material and a couple days of work, but itís a fairly easy project. I looked at buying a carbon tube, but they were all well over a boat buck.
Another option is to find a broken carbon mast from a beach cat or something with a similar size section.
I have a broken M32 mast that I was as going to use, but looked too large to be esthetically pleasing.
mrybas is offline   Reply With Quote
Old 02-11-2018, 09:22   #8
Registered User

Join Date: May 2008
Location: Currently cruising the eastern Caribbean
Boat: Lagoon 42, Minx
Posts: 51
Re: Carbon Fiber Wind Generator Mast

Sailboard masts are designed to carry the forces of the sail in decreasing amounts as you go from the base towards the top, with additional rush reinforcement in the expected area of the boom attachment Also for gust control, the mast will frequently be manufactured to be more flexible at the top. Either or both features are undesirable in a wind generator mast. The last thing you want is a wind generator whipping around.
singlespeed is offline   Reply With Quote
Old 02-11-2018, 09:57   #9
Registered User

Join Date: Nov 2015
Location: Fl
Boat: Wauquiez Hood 38
Posts: 1,169
Re: Carbon Fiber Wind Generator Mast

I raced across the North Atlantic on a 40' trimaran with an AirX on a carbon fiber windsurfer mast. The struts were made from carbon hockey sticks. Worked fine.
__________________
Keth

Boat Vinyl Lettering and Graphics
Bleemus is offline   Reply With Quote
Old 02-11-2018, 11:57   #10
Registered User

Join Date: May 2012
Location: Brazil
Boat: waiting for our Fountaine Pajot Astrťa 42.
Posts: 64
Re: Carbon Fiber Wind Generator Mast

Interesting ideas !
Anybody can tell us if it is more or less prone to transmitting the vibrations ?
Luc bulterys is offline   Reply With Quote
Old 02-11-2018, 17:49   #11
Registered User

Join Date: Dec 2009
Location: Australia
Boat: building Roberts Mauritius 43ft
Posts: 901
Re: Carbon Fiber Wind Generator Mast

Quote:
Originally Posted by singlespeed View Post
Sailboard masts are designed to carry the forces of the sail in decreasing amounts as you go from the base towards the top, with additional rush reinforcement in the expected area of the boom attachment Also for gust control, the mast will frequently be manufactured to be more flexible at the top. Either or both features are undesirable in a wind generator mast. The last thing you want is a wind generator whipping around.
Singlespeed

Looking at the mast I have the wind generator wouldn't whip around as you'd only use the bottom half which would be quite stiff. But I agree with you, you need to keep it as steady as possible.

However many people mount them on top of their mizzen mast - hardly a stable platform in an even moderate sea.

Wind speeds at the masthead can be 50 percent greater than at sea level due to wind shear, so the higher up you put it, the more power youíll get. Of course, the pendulum effect of a moving boat means that putting a wind generator higher up will increase the effects of pitch and roll

Clive
coopec43 is offline   Reply With Quote
Old 03-11-2018, 14:57   #12
Senior Cruiser
 
44'cruisingcat's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 8,776
Images: 69
Re: Carbon Fiber Wind Generator Mast

Aluminium tube would be nearly as light and much cheaper.
__________________
"You CANNOT be serious!"


John McEnroe
44'cruisingcat is offline   Reply With Quote
Old 08-11-2018, 07:22   #13
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: 1987 Cabo Rico 38 #117
Posts: 3,875
Re: Carbon Fiber Wind Generator Mast

My problem with Aluminum is the look. I don't want a mashup of stainless and aluminum. I like the idea of laying up a little carbon fiber around a fiberglass pole. What would that layup look like?
zboss is offline   Reply With Quote
Old 08-11-2018, 07:28   #14
Registered User

Join Date: Nov 2015
Location: Fl
Boat: Wauquiez Hood 38
Posts: 1,169
Re: Carbon Fiber Wind Generator Mast

Why go through all that hassle when it has already been done for you? Get a windsurfer mast and two carbon hockey sticks. Voila.
__________________
Keth

Boat Vinyl Lettering and Graphics
Bleemus is offline   Reply With Quote
Old 08-11-2018, 07:29   #15
Registered User

Join Date: May 2012
Location: Richmond CA
Boat: Freedom 40
Posts: 189
Re: Carbon Fiber Wind Generator Mast

Quote:
Originally Posted by mrybas View Post
Attachment 179998Attachment 179999

I laid up a 12í carbon pole over a 3Ē PVC pipe that was used as a mold. 3í of the pole is buried below the deck and glassed to the inside of the hull. I havenít weighed it, but Iíd guess itís about 15-20 lbs.
The pole probably cost about $350 in material and a couple days of work, but itís a fairly easy project. I looked at buying a carbon tube, but they were all well over a boat buck.
Another option is to find a broken carbon mast from a beach cat or something with a similar size section.
I have a broken M32 mast that I was as going to use, but looked too large to be esthetically pleasing.
Nice work. Did you remove the PVC pipe? And if yes, details.
__________________

__________________
Erik
bad.wabbit is offline   Reply With Quote
Reply

Tags
generator, mast, wind, wind generator

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pulling the carbon fiber mast this week... gamayun Construction, Maintenance & Refit 9 21-02-2016 10:05
For Sale: CARBON FIBER MAST WITH HARDWARE FOR GAFF OR CUTTER boatpro Classifieds Archive 0 24-07-2015 17:12
Want To Buy: Broken carbon fiber mast or boom wanted OB1985 Classifieds Archive 0 12-10-2013 16:24
C&C 115 Carbon Fiber mast track problem mt7555 Construction, Maintenance & Refit 1 16-08-2013 07:21
For Sale: Carbon Fiber Mast and Boom acharne Classifieds Archive 13 18-06-2011 16:37



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 01:42.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.