Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 22-11-2009, 08:45   #1
Registered User

Join Date: Feb 2009
Posts: 1,321
Wind Vane Transducer Installation

Why is it that 99% of the wind vane transducers I have seen are fitted forward of the masthead, facing an undisturbed flow of air where it is not possible to sail and in an other hand receiving a flow of air disturbed by navigations lights and other items when sailing down wind?
__________________

__________________
chala is offline   Reply With Quote
Old 22-11-2009, 12:12   #2
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Sailing before the wind, a wind instrument will only measure the wind that gets past the vessel, which should be very little. Besides your sails should tell you from which direction the wind is coming, otherwise your sails will be thrashing around unfilled in which one would have little time to even view his instrument.
__________________

__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 23-11-2009, 20:17   #3
Registered User

Join Date: Feb 2009
Posts: 1,321
It is an accurate wind direction that is of importance to a helmsman or an autopilot, not so much the speed of the wind.
__________________
chala is offline   Reply With Quote
Old 23-11-2009, 20:35   #4
Moderator Emeritus
 
Pblais's Avatar

Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
Images: 15
Send a message via Skype™ to Pblais
Quote:
Why is it that 99% of the wind vane transducers I have seen are fitted forward of the masthead
On some boats they can't install the vane forward and have to install it backward. I have a boat that had it both ways and can't say it really matters in spite of most people doing it forward. It seems the better idea in any case.

They won't disqualify you for it. You need a place that can support the installation on the top of the mast head. I suppose you could do it sideways and calibrate it just fine too. The vortex from the mast will have an effect. If it really matters you'll never know.
__________________
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Pblais is offline   Reply With Quote
Old 03-12-2009, 21:25   #5
Registered User

Join Date: Feb 2009
Posts: 1,321
I would have thought that this type of obstruction on the front of the autopilot wind vane would have the same effect on the course keeping ability of the autopilot as the dangling of a steel can near the autopilot fluxgate compass.
Attached Thumbnails
Click image for larger version

Name:	winvaob.jpg
Views:	141
Size:	272.4 KB
ID:	11495  
__________________
chala is offline   Reply With Quote
Old 04-12-2009, 07:09   #6
Moderator Emeritus
 
Pblais's Avatar

Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
Images: 15
Send a message via Skype™ to Pblais
Quote:
I would have thought that this type of obstruction on the front of the autopilot wind vane would have the same effect on the course keeping ability of the autopilot as the dangling of a steel can near the autopilot fluxgate compass.
It's not clear to me what you are talking about.
__________________
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Pblais is offline   Reply With Quote
Old 04-12-2009, 07:29   #7
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,577
Images: 240
Quote:
Originally Posted by Pblais View Post
It's not clear to me what you are talking about.
Quote:
Originally Posted by chala View Post
I would have thought that this type of obstruction on the front of the autopilot wind vane would have the same effect on the course keeping ability of the autopilot as the dangling of a steel can near the autopilot fluxgate compass.
I suspect ...

A steel can (or any other magnetic material), placed in close proximity to a compass, will cause magnetic disturbances , resulting in compass error.

Likewise, installing anything in the airstream of a wind vane will cause aerodynamic anomalies, resulting in vane error.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 04-12-2009, 10:49   #8
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,825
What the heck is that thang?
__________________
Memento,homo, quia pulvis es, et in pulverem reverteris.
senormechanico is online now   Reply With Quote
Old 04-12-2009, 19:01   #9
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
Same with thongs, but made in SS.

b.
__________________
barnakiel is offline   Reply With Quote
Old 05-12-2009, 07:32   #10
Registered User

Join Date: Feb 2009
Posts: 1,321
You got it Gord:flowers:
Feed rubbish into a course computer and you get rubbish out.
__________________

__________________
chala is offline   Reply With Quote
Reply

Tags
installation

Thread Tools
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
We Need Help with an Aries Wind Vane Sally Bagshaw Seamanship & Boat Handling 32 24-03-2017 07:33
Which Wind Vane? Simes General Sailing Forum 36 19-01-2015 14:10
Pendulum Wind Vane vs Auxiliary Rudder Vane SimonV Seamanship & Boat Handling 8 03-02-2011 18:14
Wind Vane Only henryk Construction, Maintenance & Refit 34 04-05-2010 21:14
ST60 Wind transducer amytom Marine Electronics 3 25-03-2009 16:49



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 09:32.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.