Retrofitting newer style Inter rudders to 5.5.

Those are first gen inter rudders. I don't want to be a debbie downer, but the 5.5 (no dagger boards) might be a bit touchy with those. there are a bunch of 5.7 blades on the classifieds here right now. But don't let me stop you. If it works ... do it.

my bad .. they are on ebay ... http://www.ebay.com/itm/Nacra-5-0-5-7-Catamaran-Rudders-/280855330557?pt=Boat_Parts_Accessories_Gear&hash=item4164483efd&vxp=mtr#ht_500wt_1289

Edited by nhanson on Apr 02, 2012 - 05:38 PM.

those look to me like they'll work great for his 5.5. It looks like they're a touch longer (makes sense w/ skegs from the 570) but I doubt that's an issue. Maybe you're looking at my pic of the Inter rudder? I'm not planning on using it for anything other than my Inter. =)

Here's a pic of the 5.2/5.5's next to the inter (not to scale, just for quick comparison):

Also, the 5.5 most def. has daggers, not sure what you meant there.

N hanson, I have a 5.5 Uni and it has pretty big dagger boards, see my Avatar the up board is as tall as I am. The rudders from the 570 are longer and will help with the fact I have a hooter or soft spin set up on the boat. My only question at this point is rake, do I have it close enough or not. The first pix make me think it will be very close, I will know when I sail it. My plan is to sail it with one rudder down at a time and feel the helm, make adjustments and then do the other side. I can do that without the spin right off of the beach.

I don't think that the rudders and rake will affect each other at all in this case. The rudders may feel a little heavy but I don't think your rake will negate that (without drastically moving it forward, which isn't an option)

The 5.5 is balanced enough that I doubt the slightly larger rudders present any issue at all. You'll know soon enough. (hopefully the rest of us will too)

I agree with you Yurdle, I think they could even be better, a longer blade will give more stability. Also the rake adjustment is very easy on the Inter style castings. I will not know for sure for several weeks. Richard.