Heavy winds? - Page 4 - SailNet Community

   Search Sailnet:

 forums  store  

Quick Menu
Boat Reviews  
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Hatches and Portlights
Interior And Galley
Marine Electronics
Other Items
Plumbing and Pumps
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here

Go Back   SailNet Community > Skills and Seamanship > Learning to Sail
 Not a Member? 

Like Tree8Likes
LinkBack Thread Tools
Old 12-19-2012
blt2ski's Avatar
Senior Member
Join Date: May 2005
Posts: 6,836
Thanks: 0
Thanked 25 Times in 24 Posts
Rep Power: 10
blt2ski will become famous soon enough
Re: Heavy winds?

Originally Posted by Cruisingdad View Post
Please make sure to emphasize "... YOU ARE the "BEST LOOKING..." SOunds better that way. Also helps to keep my fellow male mods (the not good looking ones) in check!!

"WHO" claims you to be the BEST looking MALE mod?!?!?! not me!

Winston is he best looking MALE mod! Didn't know he was a mod did ya! Time to delete ol CD with that spikey collared ugly thingy of a dog! Yep. that is my story and I am sticken to it!

So with that, when do you come up here to the NW next?

She drives me boat,
I drives me dinghy!
Reply With Quote Quick reply to this message Share with Facebook
Old 12-22-2012
Senior Member
Join Date: Nov 2005
Location: Milton, DE
Posts: 592
Thanks: 2
Thanked 7 Times in 7 Posts
Rep Power: 10
Flybyknight is on a distinguished road
Re: Heavy winds?

Originally Posted by lapworth View Post
I was out the other day with a cold North wind on the bay. There was only a few white caps so I believe the wind was around 12 knts at most. I like to get the boat moving between 3.5 to 2.5 knts. I am trolling. Almost all summer there in these conditions I would use small jib and main. Yesterday with this setup I was doing almost 5. So I reefer and that only slowed me down to 4-4.5. Finally decided to drop main. Now I was sailing at 3-3.5 knts. Are cold winds heavier then warm winds making your boat sail faster. Also i was sailing across channel so current would be a very small factor.
To answer your question, air density at 80 degrees is 0.070 lbs./cubic ft. while at 30 deg. it's 0.081lbs. But since the major driving force was the Bernoulli effect, I think that the cold air gives a different perception, imho.
dugsmith98 likes this.
Reply With Quote Quick reply to this message Share with Facebook
Old 12-22-2012
Join Date: Mar 2012
Location: Richmond ky
Posts: 748
Thanks: 47
Thanked 11 Times in 11 Posts
Rep Power: 4
Lou452 is on a distinguished road
Re: Heavy winds?

This is way out of my limit . Bernoulli did most of his work of I think in fluid dynamics. Fluid that you can not compress. Air can compress more than fluid. Some fluid can because it has gases inside. I fly, I sail I fit pipe with fluids and gases and changing of state from gases to fluid super heat and so on. This could be the point when we need to ask the PE to explain. I will just have to take his word he will pull out a lot of math with letters an such, I will stay with my first and the majority. Cold air has more lift and power. Any PE want to jump in this? Regards ,Lou
Reply With Quote Quick reply to this message Share with Facebook
Old 12-23-2012
sealover's Avatar
Senior Member
Join Date: Jun 2009
Posts: 357
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 6
sealover is on a distinguished road
Re: Heavy winds?

My question about the anemometer - mine is three little cups on short plastic arms, all of which rotate about an axle. When the wind is making the whole mess rotate, it's more or less "filling" one of those cups at any time, but the other two are heading (backwards) back into the wind. Maybe nice weather stations take temperature into account when converting shaft rpm into wind speed?

Air feels a whole lot heavier when riding a motorcycle without a windshield. 23 degrees is the coldest I've ridden any real distance. Noticeably different lean-forward angle compared to 95 degrees. Not that I care at 23 degrees. I'm just cussing and hanging on for dear life.
Keep the expenses low and the good times high.

S/V Waitara
Venture 21
PA Freshwater / Chesapeake
Reply With Quote Quick reply to this message Share with Facebook
Old 12-23-2012
Faster's Avatar
Just another Moderator
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,083
Thanks: 99
Thanked 281 Times in 271 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Re: Heavy winds?

With an anemometer the cups are pushed, on the 'wrong way' side of rotation you're fighting the drag.. I think the density difference will even out/cancel in this case.

Bernoulli is an 'easy' way to explain lift but it's not the true science.

As an extreme illustration, think of standing on a dock with 5 knots of wind.. no problem... then go stand in a creek with 5 knots of current running... good luck staying on your feet. Same velocity a lot more force....

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)
Reply With Quote Quick reply to this message Share with Facebook

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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

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
Tacking in heavy winds Jetexas Learning to Sail 8 12-18-2012 03:17 PM
Heavy winds take a toll in New Bedford harbor - SouthCoastToday.com NewsReader News Feeds 0 11-09-2012 11:40 PM
Where I've Been (Pic Heavy) Cruisingdad General Discussion (sailing related) 16 11-06-2011 08:07 PM
Sailors faced heavy winds at Dauphin Island Race (Pensacola News Journal) NewsReader News Feeds 0 05-02-2006 02:16 AM
Good for heavy AND light winds? jbarros Boat Review and Purchase Forum 4 09-30-2003 11:03 AM

All times are GMT -4. The time now is 05:19 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, 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.