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[quote=BigWhoop]First off it would be class legal for the Hobie 16, but not most other classes.

1.1  Rudder blades made of another material, yet 
conforming to the size, shape and minimum 
weight of the standard rudder blades, may be 
used. Rudder blades must conform within the 
minimum and maximum dimensions that are 
found within the profile plans. Profile plans are 
available through the IHCA. 
 
1.2  The maximum thickness of a rudder blade(s) 
shall not exceed 1.015 in. (25.8 mm.), tapering 
over a distance of 2 ft. (60.96 cm) to a maxi- 
mum thickness of 1/2 in. (12.7 mm), 2 in. (50.8 
mm) from the bottom tip of the rudder. These 
dimensions are for reference purposes only. 
Please refer to profile plans for exact dimen- 
sions. Profile plans are available through the 
IHCA.

They have to weigh as much as an EPO rudder, about 3 pounds. The original EPO rudders have a foam core and about three layers of glass and epoxy over that. So you don't need to make the core all that strong if you put enough glass over the top.

That being said a plastic rudder costs $25 to $55 depending. Shipping is usually around $25. For what it's worth as stock rudder weighs about 7 pounds.[/quote]

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