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PostPosted: Thu May 01, 2014 8:45 pm 
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Apologies if this has been covered elsewhere.

I have a fully kitted out shed and as a bit of a laugh I was thinking of making a pair of Hobie 14 rudders.

I was thinking of using 25mm ply shaped to the right dimensions and then finishing it in some sort of marine paint / epoxy.

Is 25mm ply feasible for a 14 rudder?

Has anyone done this before or could they please point me to where I might find some information.

I don't want to spend $100's of dollars so a quick knockup of the blades with a jigsaw / router, round off the edges to give it the right profile and slap some sort of coating on it.

I've been doing some reading this product which seems like the go. http://www.yachtpaint.com/aus/diy/produ ... rdure.aspx

Am I dreaming or can this be done.

Cheers.


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PostPosted: Fri May 02, 2014 7:04 am 
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Location: High Point, NC
I'd tackle that route by using the plywood as a core and then glassing over the wood.


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PostPosted: Fri May 02, 2014 8:44 am 
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Location: Clinton Lake, KS
Search my threads. I have all the mahogany laying around to build a set, I just don't have it done yet.

Sent from my stone tablet


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PostPosted: Fri May 02, 2014 8:04 pm 
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Joined: Mon Jul 14, 2003 7:11 pm
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Location: Detroit, MI
Muz wrote:
Is 25mm ply feasible for a 14 rudder?

25 mm is the correct thickness, but there's plywood and there's plywood.
Marine ply is what you want - waterproof glue and lots of layers:
Image

Muz wrote:
Has anyone done this before or could they please point me to where I might find some information.

The Brazilians used to make wooden rudders - the Hobie 16 World Championship perpetual trophies are made from two of them.

Muz wrote:
I don't want to spend $100's of dollars so a quick knockup of the blades with a jigsaw / router, round off the edges to give it the right profile and slap some sort of coating on it.

Now that's where you go off track. You can't just "round off the edges" and expect them to behave nicely - they'll stall and ventilate at anything but very low speeds. They will be very twitchy at higher speeds and the boat will be difficult to control.

Instead of reading up on the finish paint, read up on this:
Image
http://books.google.com/books/about/The ... ZYUGNyuboC


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PostPosted: Sun May 04, 2014 5:06 pm 
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Thanks for all the answers.


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PostPosted: Sun May 04, 2014 5:34 pm 
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Location: Detroit, MI
I couldn't get on the Hobie Worlds site when I originally replied, but I can now - here's a photo of the Brazilian rudders turned into perpetual trophies for the World Champions:
Image


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PostPosted: Tue May 06, 2014 6:12 am 
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Brilliant.

Are there any templates on the web for these rudders? Had a bit of a look but I cant find any.


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PostPosted: Tue May 06, 2014 7:43 am 
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Muz wrote:
Brilliant.

Are there any templates on the web for these rudders? Had a bit of a look but I cant find any.

Email the IHCA - david.brookes(at)hobieclass.com - they have outline templates.


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PostPosted: Sat May 17, 2014 8:33 pm 
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MBounds wrote:
Muz wrote:
Brilliant.

Are there any templates on the web for these rudders? Had a bit of a look but I cant find any.

Email the IHCA - david.brookes(at)hobieclass.com - they have outline templates.


Many thanks.


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