speed on different tacks - 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 > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 07-22-2012
Junior Member
 
Join Date: Jul 2012
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
ClydeEStarr is on a distinguished road
speed on different tacks

I sail a Columboa 8.7 circa 1977. The boat sails faster on starboard tack than on port - 6 knots vs 4.5 - 5 knots. Boat weight is evenly distributed - mast is straight. Tension on shrouds is OK. I have not checked with GPS. Can this be a knotmeter/paddlewheel problem?

Clyde
Reply With Quote Share with Facebook
  #2  
Old 07-22-2012
Senior Member
 
Join Date: Feb 2012
Location: New Orleans Louisiana
Posts: 1,931
Thanks: 6
Thanked 43 Times in 41 Posts
Rep Power: 3
Stumble is on a distinguished road
Re: speed on different tacks

Clyde,

It absolutely could be.

Also look at trim placement, and rig tune. Side to side rig tension should be a little different due to small differences in rig geometry.
__________________
Greg Rubin
Attorney
Reply With Quote Share with Facebook
  #3  
Old 07-22-2012
Senior Member
 
Join Date: Feb 2008
Location: N. VA
Posts: 656
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 7
dacap06 is on a distinguished road
Send a message via Yahoo to dacap06
Re: speed on different tacks

I'd borrow a hand held GPS and check your speed with that. Be sure either to check it during slackwater time or else account for the current speed when you measure speed over ground (SOG) with your GPS.
__________________
T. P. Donnelly
S/V Tranquility Base
1984 Islander 30 Bahama
Pasadena, MD
Reply With Quote Share with Facebook
  #4  
Old 07-23-2012
marcusc130's Avatar
Senior Member
 
Join Date: Oct 2011
Location: Jamestown, RI
Posts: 112
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3
marcusc130 is on a distinguished road
speed on different tacks

If the paddle wheel isn't mounted midline, or if it's getting some turbulence from the keel or rudder, that could cause a problem. Is the problem consistent? Many times I notice a faster tack when I'm sailing, due to current or prevailing winds.
Reply With Quote Share with Facebook
  #5  
Old 07-24-2012
grumpy old man
 
Join Date: Apr 2011
Posts: 3,647
Thanks: 1
Thanked 74 Times in 70 Posts
Rep Power: 4
bobperry will become famous soon enough
Re: speed on different tacks

I agree with Marcus. If your speedo is off to one side it is getting different flows off the keel and that could account for the different reading.
__________________
Please visit my blog. It's fun to read.


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

Bob's Blog ....

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


Please also visit my new web site
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 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
Starboard and Port tacks? ImASonOfaSailor General Discussion (sailing related) 74 07-30-2012 08:58 PM
VMG with lots of tacks Barquito Racing 9 07-20-2012 02:01 PM


All times are GMT -4. The time now is 06:19 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.