Rudders on Miracle: falling apart, delaminating

Yeah, pretty much. Except if it were me ... oh the evil I have done starting out that way, I'd use West epoxy. Remove the shredded bit. Glue everything back into alignment. Remove a couple or three of layers thickness of material along the break line. Add in four or five layers of new glass cloth along the break line coming out maybe a touch thicker (stronger) than before. Spray some white stuff over the top. Go sailing. I'll try and put up the pictures I made of a very similar repair on my 21 rudder a year or so ago.

'new'? How frustrating. You definitely need to repair that sooner rather than later.

Finally started working on rudders. When I sanded off some of loose pieces, it just started crumbling on pieces. Inside of rudder some weird crumbling stuff? What is that? I expected foam, wood ... but not this!

What to do now?
BTW: Is H20 rudders are different from rest of hobie cats? Can I use other cats rudders? Anybody sell rudders in good condition?

Andrew,
That looks like an improperly done old repair, but very fixable as mentioned above.

I have a set of Nacra 5.8/6.0 rudders if you really want to go that route.

IMO, since the rudder isn't currently usable (so you don't lose time on the water no matter what you do), you should drop about $150 and get all the proper stuff to fix. I'm terrible at top/finish coats, and probably haven't accounted for it in the $150 above, but I know for that price you can rebuild that thing and have a structurally sound foil.

Just don't skimp -- do it right. If it lasts twice as long (1yr vs 2, as doing it wrong won't last long) it's worth it.

I'll second that. I finally started working on my hulls, and I'm having to deal with a number of "not quite" repairs where someone took an easier route. They don't last, and they're even worse to re-do later.

$150 doesn't sound unreasonable for what it'll take. I just picked up top coat stuff for my hulls and rudders today, and that's about right.

Tom