Print Page | Close Window

Swedish mainsail

Printed From: Sailrite Enterprises, Inc.
Category: Sailmaking
Forum Name: Sail Design
Forum Discription: Sail shape, two dimensional and three dimensional
Printed Date: 10 July 2020 at 11:39am

Topic: Swedish mainsail
Posted By: lumeij
Subject: Swedish mainsail
Date Posted: 02 September 2014 at 6:49am
In the Saillrite book on stormsail construction it is stated that a yacht with a Swedish mainsail consistently points higher then with a reefed mainsail. It is stated that despite the area being only about 50%, the most effective part is not affected. Would it be possible to get a more detailed explanation for this statement. I don't seem to be able to figure out why a Swedish mainsail would be more effective than a reefed mainsail with the same area, other than the fact that a Swedish mainsail doesn't have the bulk of the reefed mainsail hanging from or tied to the boom.

J.T. Lumeij

Posted By: MattGrant
Date Posted: 02 September 2014 at 7:34am
The tied bulk is the exact reason that the swedish main is more efficient. I suggest that you read "Sail Performance" by C.A. Marchaj for a complete understanding of why less lift is generated at the narrow top of a sail when compared to the wider foot section. If you disturb airflow at the foot of the sail you are hampering the effectiveness of that portion of the sail.

Best Regards,
Matt Grant

Posted By: anee
Date Posted: 14 February 2018 at 9:28am
Swedish main is totally more efficient! I aggree for 100%


Print Page | Close Window