DN NA Class  

DN America Forums

July 08, 2020, 12:33:28 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Search Login Register  
Pages: [1]
  Print  
Author Topic: Sail shape  (Read 4639 times)
DN 5449
Class Member
*
Posts: 366


« on: December 27, 2010, 05:48:59 AM »

Sailing in about 8- 10 mph winds yesterday with smooth ice and about 1" of light snow cover,I noticed while going upwind my lower telltales where showing a stall while my upper ones where showing a little luff.At the time I felt like I was pretty much on the wind and played around with easing the sail and also trying to come up with unnoticable increase in speed.Also at the same time noticed the bottom of my sail (near the window) was luffing slightly,almost looked like the effect you get when sailing on a boat with a jib and the jib is back winding the main.This luff was only noticed at the lower 1/3 of the sail.I am sailing with a 2007 FO1 Boston sail,that still seems very crispy.I was also sailing with shrouds slightly looser,and mast a little straighter.
Normally if I read this on a sailboat with a traveller it would indicate to me to travell inward,not sure what the main is telling me here?
Logged
Ken Smith
ADMIN

Posts: 290


sail often, travel light


« Reply #1 on: December 27, 2010, 04:36:15 PM »

Well, it might be telling you you need a flatter sail.  At least for max speed.  A fuller sail lets you accelerate from the start and out of tacks.  Its a trade-off.

Or it might be telling you to bend the mast more.

Or it might be telling you that the mast is over-rotating.  Move the boom or deck blocks to pull some of the rotation out of the mast when sheeted to be two-blocked.  Try alternate mast base location for pivot.

Or it might be telling you to move to Florida.  No one else seems to be able to be sailing....
Logged

Ken Smith
DN4137US
Geoff Sobering
Class Officer
***
Posts: 461



WWW
« Reply #2 on: December 27, 2010, 04:50:26 PM »

More outhaul tension to flatten the lower sail?
Logged

Man Why You Even Got to Do a Thing
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1 RC3 | SMF © 2001-2006, Lewis Media Valid XHTML 1.0! Valid CSS!