how to make a marconi sail - Page 2 - 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
  #11  
Old 05-04-2013
Junior Member
 
Join Date: Mar 2013
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
tommad is on a distinguished road
Re: how to make a marconi sail

Hey my first post so go easy on me.
The sail has to look like an airplane wing if you want marconi effect.
You need lateral resistance also preferably in the shape of a foil, to get the same kind of lift under water. Sails up top high pressure on the front side, low on the loured side, therefor fast flow adhering to the back side of the sail, causing marconi basically sucking forward and wind ward. Under water with pressure on the leeward and low on windward. Same but opposite. Again sucking you forward and if well built to windward. So basically you have an airplane wing turned on it side on the top of the boat, and one at the bottom of the boat. (airplane on it's side) Thrust is caused by the pressure and the lateral resistance, that's the fuel. the "lift" is cause by the marconni effect.

Basically I think of it as an airplane turned 90 degrees
tm
Reply With Quote Share with Facebook
  #12  
Old 05-05-2013
Senior Member
 
Join Date: Jan 2011
Posts: 666
Thanks: 0
Thanked 17 Times in 17 Posts
Rep Power: 4
Frogwatch is on a distinguished road
Re: how to make a marconi sail

What he needs for his kayak are called "Leeboards" and consist of rotatable daggerboards on either side of the hull. They rotate up or down. Down for sailing to prevent the boat going sideways (making leeway) and up for shallow water. They can be on a common axle running across the deck of the kayak and should project about a foot below the bottom of the kayak.
What do you use as a rudder?
Leeboards are a common feature on some shoal draft boats (check out the designs of Michalak and Bolger)
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
How to make my own sail? MattMcc804 Learning to Sail 9 05-06-2013 11:18 PM
What can I EASILY make out of an old sail vtsailguy Gear & Maintenance 26 02-19-2013 09:41 AM
make a gale sail SailingChance General Discussion (sailing related) 18 01-23-2013 02:54 PM
converting marconi to gaff rig BenMP Gear & Maintenance 12 11-29-2010 12:11 AM
gaff rigged? Full Battened Marconi? jbarros Boat Review and Purchase Forum 11 08-06-2003 11:03 AM


All times are GMT -4. The time now is 11:14 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