Dinghy development: Rudder Blade Shape

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Rudder Blade Shape

Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=3071
Printed Date: 18 Aug 25 at 10:24pm
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com

Topic: Rudder Blade Shape

Posted By: Pabs
Subject: Rudder Blade Shape
Date Posted: 11 Jun 07 at 4:41pm

I am going to make a new rudder blade for my new 12. Could some one recomend me a good shape for a small lake sailed boat. I was thinking of basing it on the RS300 (RS600 also the same blade) rudder blade but making it a little bit smaller and thinner. what do people think is there a better shape? dimensions would be good

Cheers

Paul

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Boatless and Clubless

Replies:

Posted By: tickler
Date Posted: 11 Jun 07 at 7:37pm

Draw round our Tasar rudder!

Posted By: Iain C
Date Posted: 11 Jun 07 at 8:35pm

Keep it simple if it's your first build. I'd recommend a NACA0010 section (google it for the section), parallel sided with a semi elliptical bottom. Getting a nice symmetrical section is more important than planform (shape).

Chances are if you are too fussy about the planform you will end up with something that is not symmetrical in section...not good!

Have a look at the Cherub website, plenty of info on there. Good luck!

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RS700 GBR922 "Wirespeed"
Fireball GBR14474 "Eleven Parsecs"
Enterprise GBR21970
Bavaria 32 GBR4755L "Adastra"